/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/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-15 20:21:41,546 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 20:21:41,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 20:21:41,585 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 20:21:41,586 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 20:21:41,596 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 20:21:41,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 20:21:41,601 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 20:21:41,603 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 20:21:41,607 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 20:21:41,608 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 20:21:41,610 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 20:21:41,610 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 20:21:41,613 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 20:21:41,615 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 20:21:41,616 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 20:21:41,617 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 20:21:41,618 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 20:21:41,620 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 20:21:41,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 20:21:41,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 20:21:41,629 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 20:21:41,630 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 20:21:41,630 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 20:21:41,635 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 20:21:41,635 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 20:21:41,635 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 20:21:41,638 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 20:21:41,639 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 20:21:41,639 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 20:21:41,640 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 20:21:41,640 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 20:21:41,641 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 20:21:41,643 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 20:21:41,644 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 20:21:41,644 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 20:21:41,644 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 20:21:41,645 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 20:21:41,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 20:21:41,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 20:21:41,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 20:21:41,648 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf [2020-10-15 20:21:41,689 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 20:21:41,689 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 20:21:41,691 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 20:21:41,691 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 20:21:41,691 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 20:21:41,691 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 20:21:41,691 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 20:21:41,692 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 20:21:41,692 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 20:21:41,692 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 20:21:41,693 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 20:21:41,693 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 20:21:41,693 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 20:21:41,694 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 20:21:41,694 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 20:21:41,694 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 20:21:41,694 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 20:21:41,695 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 20:21:41,695 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 20:21:41,695 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 20:21:41,695 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 20:21:41,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 20:21:41,696 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 20:21:41,696 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 20:21:41,696 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 20:21:41,696 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 20:21:41,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 20:21:41,697 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 20:21:41,697 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-15 20:21:41,967 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 20:21:41,982 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 20:21:41,986 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 20:21:41,987 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 20:21:41,988 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 20:21:41,988 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-2.i [2020-10-15 20:21:42,064 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e33ee4ca8/6ea16bea5a5b48e392450628f77d6256/FLAG687487d4d [2020-10-15 20:21:42,543 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 20:21:42,544 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-2.i [2020-10-15 20:21:42,565 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e33ee4ca8/6ea16bea5a5b48e392450628f77d6256/FLAG687487d4d [2020-10-15 20:21:42,861 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e33ee4ca8/6ea16bea5a5b48e392450628f77d6256 [2020-10-15 20:21:42,870 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 20:21:42,871 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-15 20:21:42,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 20:21:42,873 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 20:21:42,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 20:21:42,877 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:21:42" (1/1) ... [2020-10-15 20:21:42,880 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57e773e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:42, skipping insertion in model container [2020-10-15 20:21:42,880 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:21:42" (1/1) ... [2020-10-15 20:21:42,887 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 20:21:42,942 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 20:21:43,398 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 20:21:43,412 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 20:21:43,487 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 20:21:43,555 INFO L208 MainTranslator]: Completed translation [2020-10-15 20:21:43,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:43 WrapperNode [2020-10-15 20:21:43,556 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 20:21:43,556 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-15 20:21:43,557 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-15 20:21:43,557 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-15 20:21:43,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:43" (1/1) ... [2020-10-15 20:21:43,580 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:43" (1/1) ... [2020-10-15 20:21:43,599 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-15 20:21:43,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 20:21:43,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 20:21:43,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 20:21:43,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:43" (1/1) ... [2020-10-15 20:21:43,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:43" (1/1) ... [2020-10-15 20:21:43,610 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:43" (1/1) ... [2020-10-15 20:21:43,610 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:43" (1/1) ... [2020-10-15 20:21:43,615 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:43" (1/1) ... [2020-10-15 20:21:43,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:43" (1/1) ... [2020-10-15 20:21:43,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:43" (1/1) ... [2020-10-15 20:21:43,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 20:21:43,625 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 20:21:43,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 20:21:43,625 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 20:21:43,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:43" (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 [2020-10-15 20:21:43,685 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-15 20:21:43,685 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-15 20:21:43,686 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-15 20:21:43,686 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-15 20:21:43,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-15 20:21:43,686 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-15 20:21:43,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-15 20:21:43,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-15 20:21:43,688 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-15 20:21:43,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 20:21:43,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 20:21:43,690 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-15 20:21:44,015 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 20:21:44,015 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-15 20:21:44,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:21:44 BoogieIcfgContainer [2020-10-15 20:21:44,017 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 20:21:44,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 20:21:44,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 20:21:44,021 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 20:21:44,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:21:42" (1/3) ... [2020-10-15 20:21:44,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@578bb1df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:21:44, skipping insertion in model container [2020-10-15 20:21:44,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:43" (2/3) ... [2020-10-15 20:21:44,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@578bb1df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:21:44, skipping insertion in model container [2020-10-15 20:21:44,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:21:44" (3/3) ... [2020-10-15 20:21:44,024 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-2.i [2020-10-15 20:21:44,036 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-15 20:21:44,036 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-15 20:21:44,043 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 20:21:44,044 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-15 20:21:44,067 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,067 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,068 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,068 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,068 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,069 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,069 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,069 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,069 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,070 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,070 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,070 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,070 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,071 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,071 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,071 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,071 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,072 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,072 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,072 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,073 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,073 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,073 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,073 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,074 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,074 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,074 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,074 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,078 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,078 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,079 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,079 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,079 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,079 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,085 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,085 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,085 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,086 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,086 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,086 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:44,101 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-15 20:21:44,117 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-15 20:21:44,118 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-15 20:21:44,118 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-15 20:21:44,118 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 20:21:44,118 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 20:21:44,118 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-15 20:21:44,119 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 20:21:44,119 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 20:21:44,129 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-15 20:21:44,131 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-15 20:21:44,134 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-15 20:21:44,136 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-15 20:21:44,172 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-15 20:21:44,172 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-15 20:21:44,177 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. [2020-10-15 20:21:44,179 INFO L117 LiptonReduction]: Number of co-enabled transitions 924 [2020-10-15 20:21:45,355 INFO L132 LiptonReduction]: Checked pairs total: 911 [2020-10-15 20:21:45,355 INFO L134 LiptonReduction]: Total number of compositions: 45 [2020-10-15 20:21:45,362 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-15 20:21:45,373 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-15 20:21:45,375 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-15 20:21:45,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-15 20:21:45,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:45,382 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-15 20:21:45,382 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:45,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:45,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-10-15 20:21:45,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:45,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357642815] [2020-10-15 20:21:45,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:45,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:45,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357642815] [2020-10-15 20:21:45,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 20:21:45,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-15 20:21:45,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089196102] [2020-10-15 20:21:45,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 20:21:45,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:45,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 20:21:45,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 20:21:45,629 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-15 20:21:45,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:45,694 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-15 20:21:45,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 20:21:45,696 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-15 20:21:45,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:45,708 INFO L225 Difference]: With dead ends: 75 [2020-10-15 20:21:45,708 INFO L226 Difference]: Without dead ends: 42 [2020-10-15 20:21:45,709 INFO L677 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 [2020-10-15 20:21:45,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-15 20:21:45,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-15 20:21:45,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 20:21:45,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-15 20:21:45,745 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-15 20:21:45,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:45,745 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-15 20:21:45,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 20:21:45,746 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-15 20:21:45,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 20:21:45,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:45,747 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:45,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 20:21:45,747 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:45,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:45,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-10-15 20:21:45,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:45,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804167381] [2020-10-15 20:21:45,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:45,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:45,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:45,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804167381] [2020-10-15 20:21:45,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 20:21:45,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 20:21:45,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704350564] [2020-10-15 20:21:45,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 20:21:45,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:45,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 20:21:45,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 20:21:45,824 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-15 20:21:45,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:45,853 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-15 20:21:45,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 20:21:45,854 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-15 20:21:45,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:45,855 INFO L225 Difference]: With dead ends: 56 [2020-10-15 20:21:45,855 INFO L226 Difference]: Without dead ends: 50 [2020-10-15 20:21:45,856 INFO L677 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 [2020-10-15 20:21:45,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-15 20:21:45,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-15 20:21:45,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 20:21:45,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-15 20:21:45,863 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-15 20:21:45,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:45,864 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-15 20:21:45,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 20:21:45,865 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-15 20:21:45,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 20:21:45,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:45,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:45,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 20:21:45,866 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:45,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:45,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-10-15 20:21:45,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:45,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402021008] [2020-10-15 20:21:45,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:45,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:45,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:45,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402021008] [2020-10-15 20:21:45,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 20:21:45,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 20:21:45,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943189446] [2020-10-15 20:21:45,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 20:21:45,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:45,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 20:21:45,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-15 20:21:45,947 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-10-15 20:21:46,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:46,020 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-10-15 20:21:46,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 20:21:46,021 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 20:21:46,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:46,022 INFO L225 Difference]: With dead ends: 78 [2020-10-15 20:21:46,023 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 20:21:46,023 INFO L677 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 [2020-10-15 20:21:46,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 20:21:46,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-10-15 20:21:46,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 20:21:46,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-15 20:21:46,032 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-10-15 20:21:46,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:46,032 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-15 20:21:46,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 20:21:46,033 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-15 20:21:46,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 20:21:46,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:46,034 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:46,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 20:21:46,034 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:46,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:46,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-10-15 20:21:46,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:46,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273564739] [2020-10-15 20:21:46,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:46,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:46,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:46,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273564739] [2020-10-15 20:21:46,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 20:21:46,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 20:21:46,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416231265] [2020-10-15 20:21:46,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 20:21:46,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:46,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 20:21:46,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-15 20:21:46,145 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-10-15 20:21:46,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:46,234 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-15 20:21:46,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 20:21:46,237 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 20:21:46,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:46,238 INFO L225 Difference]: With dead ends: 54 [2020-10-15 20:21:46,238 INFO L226 Difference]: Without dead ends: 43 [2020-10-15 20:21:46,238 INFO L677 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 [2020-10-15 20:21:46,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-15 20:21:46,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-15 20:21:46,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-15 20:21:46,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-10-15 20:21:46,243 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-10-15 20:21:46,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:46,244 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-10-15 20:21:46,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 20:21:46,244 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-10-15 20:21:46,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 20:21:46,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:46,245 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:46,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 20:21:46,245 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:46,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:46,246 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-10-15 20:21:46,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:46,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258466706] [2020-10-15 20:21:46,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:46,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:46,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:46,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258466706] [2020-10-15 20:21:46,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 20:21:46,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 20:21:46,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145850814] [2020-10-15 20:21:46,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 20:21:46,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:46,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 20:21:46,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-15 20:21:46,304 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-10-15 20:21:46,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:46,372 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-10-15 20:21:46,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 20:21:46,372 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 20:21:46,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:46,373 INFO L225 Difference]: With dead ends: 57 [2020-10-15 20:21:46,373 INFO L226 Difference]: Without dead ends: 51 [2020-10-15 20:21:46,374 INFO L677 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 [2020-10-15 20:21:46,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-15 20:21:46,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-10-15 20:21:46,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-15 20:21:46,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-15 20:21:46,379 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-10-15 20:21:46,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:46,379 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-15 20:21:46,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 20:21:46,379 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-15 20:21:46,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 20:21:46,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:46,380 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:46,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 20:21:46,380 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:46,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:46,381 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-10-15 20:21:46,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:46,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463513853] [2020-10-15 20:21:46,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:46,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:46,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:46,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463513853] [2020-10-15 20:21:46,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116261809] [2020-10-15 20:21:46,435 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 [2020-10-15 20:21:46,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:46,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:46,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 20:21:46,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:46,556 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:21:46,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:46,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:46,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-15 20:21:46,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783072040] [2020-10-15 20:21:46,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 20:21:46,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:46,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 20:21:46,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-15 20:21:46,577 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-10-15 20:21:46,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:46,679 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-10-15 20:21:46,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 20:21:46,680 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-15 20:21:46,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:46,680 INFO L225 Difference]: With dead ends: 48 [2020-10-15 20:21:46,680 INFO L226 Difference]: Without dead ends: 43 [2020-10-15 20:21:46,681 INFO L677 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 [2020-10-15 20:21:46,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-15 20:21:46,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-15 20:21:46,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-15 20:21:46,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-10-15 20:21:46,685 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-10-15 20:21:46,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:46,686 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-10-15 20:21:46,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 20:21:46,686 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-10-15 20:21:46,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 20:21:46,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:46,687 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:46,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-15 20:21:46,888 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:46,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:46,890 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-10-15 20:21:46,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:46,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888594689] [2020-10-15 20:21:46,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:46,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:46,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:46,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888594689] [2020-10-15 20:21:46,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186738714] [2020-10-15 20:21:46,961 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 [2020-10-15 20:21:47,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:47,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:47,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 20:21:47,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:47,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:47,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:47,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-15 20:21:47,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750762048] [2020-10-15 20:21:47,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 20:21:47,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:47,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 20:21:47,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-15 20:21:47,025 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-10-15 20:21:47,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:47,088 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-15 20:21:47,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 20:21:47,088 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-15 20:21:47,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:47,089 INFO L225 Difference]: With dead ends: 54 [2020-10-15 20:21:47,089 INFO L226 Difference]: Without dead ends: 48 [2020-10-15 20:21:47,090 INFO L677 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 [2020-10-15 20:21:47,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-15 20:21:47,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-15 20:21:47,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 20:21:47,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-10-15 20:21:47,094 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-10-15 20:21:47,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:47,095 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-10-15 20:21:47,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 20:21:47,095 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-10-15 20:21:47,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 20:21:47,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:47,096 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:47,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:47,306 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:47,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:47,307 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-10-15 20:21:47,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:47,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382076508] [2020-10-15 20:21:47,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:47,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:47,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:47,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382076508] [2020-10-15 20:21:47,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499278978] [2020-10-15 20:21:47,369 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 [2020-10-15 20:21:47,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 20:21:47,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:47,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 20:21:47,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:47,439 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:47,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:47,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:47,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-15 20:21:47,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741930999] [2020-10-15 20:21:47,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 20:21:47,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:47,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 20:21:47,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-15 20:21:47,454 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-10-15 20:21:47,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:47,541 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-10-15 20:21:47,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 20:21:47,541 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-15 20:21:47,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:47,542 INFO L225 Difference]: With dead ends: 58 [2020-10-15 20:21:47,542 INFO L226 Difference]: Without dead ends: 52 [2020-10-15 20:21:47,543 INFO L677 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 [2020-10-15 20:21:47,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-15 20:21:47,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-15 20:21:47,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-15 20:21:47,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-15 20:21:47,547 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-10-15 20:21:47,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:47,547 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-15 20:21:47,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 20:21:47,548 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-15 20:21:47,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 20:21:47,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:47,549 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:47,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:47,759 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:47,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:47,760 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-10-15 20:21:47,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:47,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513917809] [2020-10-15 20:21:47,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:47,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:47,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:47,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513917809] [2020-10-15 20:21:47,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104247230] [2020-10-15 20:21:47,826 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 [2020-10-15 20:21:47,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:47,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 20:21:47,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:47,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:47,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:47,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-15 20:21:47,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233076831] [2020-10-15 20:21:47,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 20:21:47,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:47,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 20:21:47,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-15 20:21:47,888 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-10-15 20:21:48,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:48,027 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-15 20:21:48,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 20:21:48,027 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-15 20:21:48,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:48,028 INFO L225 Difference]: With dead ends: 78 [2020-10-15 20:21:48,028 INFO L226 Difference]: Without dead ends: 72 [2020-10-15 20:21:48,029 INFO L677 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 [2020-10-15 20:21:48,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-15 20:21:48,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-10-15 20:21:48,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 20:21:48,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-10-15 20:21:48,034 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-10-15 20:21:48,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:48,034 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-10-15 20:21:48,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 20:21:48,035 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-10-15 20:21:48,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 20:21:48,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:48,035 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:48,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:48,246 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:48,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:48,247 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-10-15 20:21:48,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:48,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318733038] [2020-10-15 20:21:48,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:48,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:48,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:48,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318733038] [2020-10-15 20:21:48,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129039021] [2020-10-15 20:21:48,294 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 [2020-10-15 20:21:48,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:48,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:48,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 20:21:48,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:48,362 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:48,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:48,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:48,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-15 20:21:48,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282511939] [2020-10-15 20:21:48,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 20:21:48,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:48,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 20:21:48,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-15 20:21:48,373 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-10-15 20:21:48,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:48,536 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-10-15 20:21:48,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 20:21:48,536 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-15 20:21:48,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:48,537 INFO L225 Difference]: With dead ends: 62 [2020-10-15 20:21:48,537 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 20:21:48,538 INFO L677 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 [2020-10-15 20:21:48,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 20:21:48,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-10-15 20:21:48,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-15 20:21:48,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-15 20:21:48,544 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-15 20:21:48,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:48,547 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-15 20:21:48,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 20:21:48,547 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-15 20:21:48,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 20:21:48,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:48,548 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:48,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-15 20:21:48,760 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:48,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:48,762 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-10-15 20:21:48,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:48,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375343751] [2020-10-15 20:21:48,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:48,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:48,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:48,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375343751] [2020-10-15 20:21:48,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41769128] [2020-10-15 20:21:48,839 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 [2020-10-15 20:21:48,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 20:21:48,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:48,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 20:21:48,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:48,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:48,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:48,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-15 20:21:48,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467572876] [2020-10-15 20:21:48,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 20:21:48,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:48,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 20:21:48,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-15 20:21:48,905 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-10-15 20:21:49,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:49,001 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-10-15 20:21:49,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 20:21:49,001 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-15 20:21:49,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:49,002 INFO L225 Difference]: With dead ends: 64 [2020-10-15 20:21:49,002 INFO L226 Difference]: Without dead ends: 58 [2020-10-15 20:21:49,003 INFO L677 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 [2020-10-15 20:21:49,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-15 20:21:49,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-10-15 20:21:49,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-15 20:21:49,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-10-15 20:21:49,008 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-10-15 20:21:49,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:49,009 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-10-15 20:21:49,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 20:21:49,012 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-10-15 20:21:49,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 20:21:49,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:49,013 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:49,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:49,227 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:49,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:49,228 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-10-15 20:21:49,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:49,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630251076] [2020-10-15 20:21:49,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:49,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:49,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:49,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630251076] [2020-10-15 20:21:49,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520619414] [2020-10-15 20:21:49,285 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 [2020-10-15 20:21:49,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:49,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:49,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 20:21:49,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:49,359 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:49,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:49,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:49,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-15 20:21:49,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714120087] [2020-10-15 20:21:49,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 20:21:49,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:49,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 20:21:49,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:49,371 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-10-15 20:21:49,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:49,521 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-10-15 20:21:49,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 20:21:49,521 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-15 20:21:49,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:49,522 INFO L225 Difference]: With dead ends: 61 [2020-10-15 20:21:49,522 INFO L226 Difference]: Without dead ends: 55 [2020-10-15 20:21:49,523 INFO L677 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 [2020-10-15 20:21:49,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-15 20:21:49,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-15 20:21:49,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-15 20:21:49,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-15 20:21:49,528 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-10-15 20:21:49,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:49,528 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-15 20:21:49,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 20:21:49,528 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-15 20:21:49,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 20:21:49,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:49,529 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:49,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:49,737 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:49,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:49,738 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-10-15 20:21:49,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:49,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270237744] [2020-10-15 20:21:49,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:49,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:49,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:49,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270237744] [2020-10-15 20:21:49,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202549506] [2020-10-15 20:21:49,835 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 [2020-10-15 20:21:49,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:49,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:49,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 20:21:49,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:49,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:49,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:49,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-15 20:21:49,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054029380] [2020-10-15 20:21:49,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 20:21:49,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:49,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 20:21:49,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-15 20:21:49,961 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-10-15 20:21:50,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:50,132 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-15 20:21:50,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 20:21:50,133 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-15 20:21:50,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:50,134 INFO L225 Difference]: With dead ends: 77 [2020-10-15 20:21:50,134 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 20:21:50,140 INFO L677 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 [2020-10-15 20:21:50,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 20:21:50,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-10-15 20:21:50,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-15 20:21:50,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-10-15 20:21:50,147 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-10-15 20:21:50,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:50,147 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-10-15 20:21:50,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 20:21:50,148 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-10-15 20:21:50,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 20:21:50,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:50,153 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:50,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-15 20:21:50,367 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:50,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:50,367 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-10-15 20:21:50,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:50,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721284649] [2020-10-15 20:21:50,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:50,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:50,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:50,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721284649] [2020-10-15 20:21:50,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657115322] [2020-10-15 20:21:50,461 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 [2020-10-15 20:21:50,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 20:21:50,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:50,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 20:21:50,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:50,529 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:50,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:50,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:50,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-15 20:21:50,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383312653] [2020-10-15 20:21:50,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 20:21:50,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:50,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 20:21:50,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:50,538 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-10-15 20:21:50,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:50,736 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-10-15 20:21:50,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 20:21:50,736 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-15 20:21:50,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:50,737 INFO L225 Difference]: With dead ends: 58 [2020-10-15 20:21:50,737 INFO L226 Difference]: Without dead ends: 50 [2020-10-15 20:21:50,737 INFO L677 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 [2020-10-15 20:21:50,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-15 20:21:50,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-10-15 20:21:50,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-15 20:21:50,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-10-15 20:21:50,740 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-10-15 20:21:50,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:50,741 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-10-15 20:21:50,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 20:21:50,741 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-10-15 20:21:50,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 20:21:50,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:50,742 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:50,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:50,943 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:50,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:50,943 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-10-15 20:21:50,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:50,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374387073] [2020-10-15 20:21:50,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:50,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:50,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:50,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374387073] [2020-10-15 20:21:50,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045407834] [2020-10-15 20:21:50,991 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 [2020-10-15 20:21:51,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:51,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 20:21:51,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:51,054 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:21:51,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:51,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:51,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-15 20:21:51,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322354027] [2020-10-15 20:21:51,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 20:21:51,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:51,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 20:21:51,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:51,074 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-10-15 20:21:51,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:51,241 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-10-15 20:21:51,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 20:21:51,242 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-15 20:21:51,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:51,243 INFO L225 Difference]: With dead ends: 60 [2020-10-15 20:21:51,243 INFO L226 Difference]: Without dead ends: 55 [2020-10-15 20:21:51,243 INFO L677 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 [2020-10-15 20:21:51,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-15 20:21:51,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-10-15 20:21:51,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 20:21:51,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-15 20:21:51,251 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-10-15 20:21:51,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:51,252 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-15 20:21:51,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 20:21:51,252 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-15 20:21:51,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 20:21:51,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:51,253 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:51,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-15 20:21:51,454 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:51,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:51,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-10-15 20:21:51,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:51,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76023392] [2020-10-15 20:21:51,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:51,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:51,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:51,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76023392] [2020-10-15 20:21:51,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594075520] [2020-10-15 20:21:51,513 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 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 [2020-10-15 20:21:51,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:51,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:51,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 20:21:51,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:51,583 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:21:51,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:51,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:51,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 20:21:51,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264663387] [2020-10-15 20:21:51,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 20:21:51,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:51,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 20:21:51,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:51,595 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-10-15 20:21:51,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:51,776 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-10-15 20:21:51,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 20:21:51,778 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-15 20:21:51,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:51,779 INFO L225 Difference]: With dead ends: 54 [2020-10-15 20:21:51,779 INFO L226 Difference]: Without dead ends: 49 [2020-10-15 20:21:51,780 INFO L677 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 [2020-10-15 20:21:51,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-15 20:21:51,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-15 20:21:51,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-15 20:21:51,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-10-15 20:21:51,783 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-10-15 20:21:51,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:51,783 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-10-15 20:21:51,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 20:21:51,783 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-10-15 20:21:51,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 20:21:51,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:51,784 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:51,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-15 20:21:51,992 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:51,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:51,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-10-15 20:21:51,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:51,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269753932] [2020-10-15 20:21:51,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:52,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:52,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:52,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269753932] [2020-10-15 20:21:52,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022242356] [2020-10-15 20:21:52,059 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 [2020-10-15 20:21:52,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:21:52,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:52,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 20:21:52,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:52,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:52,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:52,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-15 20:21:52,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781389067] [2020-10-15 20:21:52,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 20:21:52,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:52,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 20:21:52,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:52,129 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-10-15 20:21:52,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:52,216 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-10-15 20:21:52,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 20:21:52,216 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-15 20:21:52,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:52,217 INFO L225 Difference]: With dead ends: 60 [2020-10-15 20:21:52,217 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 20:21:52,217 INFO L677 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 [2020-10-15 20:21:52,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 20:21:52,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-15 20:21:52,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 20:21:52,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-15 20:21:52,223 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-10-15 20:21:52,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:52,223 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-15 20:21:52,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 20:21:52,240 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-15 20:21:52,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 20:21:52,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:52,241 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:52,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-15 20:21:52,442 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:52,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:52,442 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-10-15 20:21:52,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:52,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698990133] [2020-10-15 20:21:52,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:52,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:52,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:52,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698990133] [2020-10-15 20:21:52,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233402591] [2020-10-15 20:21:52,526 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 [2020-10-15 20:21:52,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:52,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:52,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 20:21:52,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:52,583 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:52,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:52,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:52,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 20:21:52,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354978412] [2020-10-15 20:21:52,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 20:21:52,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:52,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 20:21:52,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:52,596 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-10-15 20:21:52,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:52,718 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-10-15 20:21:52,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 20:21:52,719 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-15 20:21:52,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:52,719 INFO L225 Difference]: With dead ends: 66 [2020-10-15 20:21:52,719 INFO L226 Difference]: Without dead ends: 60 [2020-10-15 20:21:52,720 INFO L677 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 [2020-10-15 20:21:52,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-15 20:21:52,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-15 20:21:52,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-15 20:21:52,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-15 20:21:52,723 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-10-15 20:21:52,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:52,723 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-15 20:21:52,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 20:21:52,724 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-15 20:21:52,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 20:21:52,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:52,724 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:52,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-15 20:21:52,933 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:52,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:52,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-10-15 20:21:52,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:52,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682276] [2020-10-15 20:21:52,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:52,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:52,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:52,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682276] [2020-10-15 20:21:52,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58037573] [2020-10-15 20:21:52,996 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 [2020-10-15 20:21:53,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:21:53,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:53,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 20:21:53,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:53,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:53,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:53,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-15 20:21:53,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486382599] [2020-10-15 20:21:53,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 20:21:53,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:53,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 20:21:53,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:53,052 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-10-15 20:21:53,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:53,193 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-10-15 20:21:53,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 20:21:53,196 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-15 20:21:53,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:53,197 INFO L225 Difference]: With dead ends: 67 [2020-10-15 20:21:53,197 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 20:21:53,197 INFO L677 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 [2020-10-15 20:21:53,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 20:21:53,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-10-15 20:21:53,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-15 20:21:53,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-10-15 20:21:53,201 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-10-15 20:21:53,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:53,202 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-10-15 20:21:53,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 20:21:53,202 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-10-15 20:21:53,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 20:21:53,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:53,202 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:53,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:53,409 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:53,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:53,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-10-15 20:21:53,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:53,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839542358] [2020-10-15 20:21:53,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:53,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:53,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:53,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839542358] [2020-10-15 20:21:53,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311515061] [2020-10-15 20:21:53,471 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 [2020-10-15 20:21:53,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:21:53,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:53,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 20:21:53,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:53,538 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:53,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:53,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:53,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 20:21:53,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244736715] [2020-10-15 20:21:53,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 20:21:53,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:53,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 20:21:53,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:53,549 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-10-15 20:21:53,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:53,731 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-10-15 20:21:53,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 20:21:53,732 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-15 20:21:53,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:53,733 INFO L225 Difference]: With dead ends: 69 [2020-10-15 20:21:53,733 INFO L226 Difference]: Without dead ends: 63 [2020-10-15 20:21:53,734 INFO L677 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 [2020-10-15 20:21:53,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-15 20:21:53,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-10-15 20:21:53,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 20:21:53,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-15 20:21:53,738 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-10-15 20:21:53,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:53,738 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-15 20:21:53,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 20:21:53,739 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-15 20:21:53,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 20:21:53,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:53,739 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:53,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:53,949 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:53,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:53,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-10-15 20:21:53,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:53,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546057847] [2020-10-15 20:21:53,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:53,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:54,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:54,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546057847] [2020-10-15 20:21:54,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929703291] [2020-10-15 20:21:54,003 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 [2020-10-15 20:21:54,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:54,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 20:21:54,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:54,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:54,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:54,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-15 20:21:54,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334097646] [2020-10-15 20:21:54,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 20:21:54,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:54,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 20:21:54,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:54,070 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-10-15 20:21:54,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:54,246 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-15 20:21:54,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:21:54,247 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-15 20:21:54,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:54,248 INFO L225 Difference]: With dead ends: 88 [2020-10-15 20:21:54,248 INFO L226 Difference]: Without dead ends: 82 [2020-10-15 20:21:54,249 INFO L677 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 [2020-10-15 20:21:54,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-15 20:21:54,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-10-15 20:21:54,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 20:21:54,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-10-15 20:21:54,253 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-10-15 20:21:54,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:54,253 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-10-15 20:21:54,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 20:21:54,254 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-10-15 20:21:54,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 20:21:54,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:54,254 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:54,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:54,460 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:54,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:54,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-10-15 20:21:54,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:54,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130362917] [2020-10-15 20:21:54,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:54,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:54,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:54,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130362917] [2020-10-15 20:21:54,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769896738] [2020-10-15 20:21:54,515 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 [2020-10-15 20:21:54,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:54,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:54,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 20:21:54,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:54,607 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:54,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:54,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:54,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 20:21:54,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387739771] [2020-10-15 20:21:54,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 20:21:54,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:54,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 20:21:54,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:54,628 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-10-15 20:21:54,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:54,869 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-10-15 20:21:54,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:21:54,869 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-15 20:21:54,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:54,870 INFO L225 Difference]: With dead ends: 69 [2020-10-15 20:21:54,870 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 20:21:54,871 INFO L677 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 [2020-10-15 20:21:54,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 20:21:54,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-10-15 20:21:54,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-15 20:21:54,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-15 20:21:54,874 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-15 20:21:54,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:54,874 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-15 20:21:54,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 20:21:54,874 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-15 20:21:54,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:21:54,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:54,876 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:55,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-15 20:21:55,085 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:55,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:55,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-10-15 20:21:55,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:55,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826319296] [2020-10-15 20:21:55,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:55,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:55,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:55,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826319296] [2020-10-15 20:21:55,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511737942] [2020-10-15 20:21:55,170 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 [2020-10-15 20:21:55,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:21:55,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:55,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 20:21:55,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:55,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:55,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:55,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-15 20:21:55,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176595500] [2020-10-15 20:21:55,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 20:21:55,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:55,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 20:21:55,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:55,238 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-10-15 20:21:55,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:55,364 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-10-15 20:21:55,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 20:21:55,364 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-15 20:21:55,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:55,365 INFO L225 Difference]: With dead ends: 74 [2020-10-15 20:21:55,365 INFO L226 Difference]: Without dead ends: 68 [2020-10-15 20:21:55,366 INFO L677 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 [2020-10-15 20:21:55,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-15 20:21:55,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-10-15 20:21:55,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-15 20:21:55,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-15 20:21:55,368 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-15 20:21:55,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:55,368 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-15 20:21:55,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 20:21:55,369 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-15 20:21:55,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:21:55,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:55,369 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:55,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-15 20:21:55,577 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:55,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:55,578 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-10-15 20:21:55,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:55,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495236580] [2020-10-15 20:21:55,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:55,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:55,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:55,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495236580] [2020-10-15 20:21:55,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749884640] [2020-10-15 20:21:55,647 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 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 [2020-10-15 20:21:55,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:55,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:55,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 20:21:55,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:55,711 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:55,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:55,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:55,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 20:21:55,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107495244] [2020-10-15 20:21:55,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:21:55,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:55,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:21:55,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:21:55,723 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-15 20:21:55,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:55,904 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-10-15 20:21:55,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 20:21:55,905 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 20:21:55,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:55,906 INFO L225 Difference]: With dead ends: 71 [2020-10-15 20:21:55,906 INFO L226 Difference]: Without dead ends: 65 [2020-10-15 20:21:55,907 INFO L677 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 [2020-10-15 20:21:55,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-15 20:21:55,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-10-15 20:21:55,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 20:21:55,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-15 20:21:55,910 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-15 20:21:55,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:55,910 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-15 20:21:55,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:21:55,910 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-15 20:21:55,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:21:55,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:55,911 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:56,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-15 20:21:56,114 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:56,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:56,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-10-15 20:21:56,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:56,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962290858] [2020-10-15 20:21:56,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:56,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:56,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:56,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962290858] [2020-10-15 20:21:56,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844260619] [2020-10-15 20:21:56,179 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 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 [2020-10-15 20:21:56,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:21:56,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:56,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 20:21:56,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:56,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:56,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:56,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-15 20:21:56,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368345568] [2020-10-15 20:21:56,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 20:21:56,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:56,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 20:21:56,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:56,238 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-15 20:21:56,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:56,394 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-10-15 20:21:56,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 20:21:56,395 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-15 20:21:56,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:56,395 INFO L225 Difference]: With dead ends: 68 [2020-10-15 20:21:56,395 INFO L226 Difference]: Without dead ends: 62 [2020-10-15 20:21:56,396 INFO L677 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 [2020-10-15 20:21:56,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-15 20:21:56,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-15 20:21:56,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-15 20:21:56,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-15 20:21:56,398 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-15 20:21:56,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:56,398 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-15 20:21:56,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 20:21:56,399 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-15 20:21:56,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:21:56,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:56,399 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:56,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-15 20:21:56,609 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:56,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:56,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-10-15 20:21:56,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:56,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341897180] [2020-10-15 20:21:56,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:56,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:56,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:56,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341897180] [2020-10-15 20:21:56,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399391555] [2020-10-15 20:21:56,674 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 [2020-10-15 20:21:56,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:21:56,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:56,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 20:21:56,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:56,737 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:56,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:56,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:56,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 20:21:56,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607130362] [2020-10-15 20:21:56,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:21:56,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:56,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:21:56,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:21:56,748 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-15 20:21:57,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:57,031 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-10-15 20:21:57,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:21:57,032 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 20:21:57,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:57,032 INFO L225 Difference]: With dead ends: 67 [2020-10-15 20:21:57,033 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 20:21:57,033 INFO L677 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 [2020-10-15 20:21:57,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 20:21:57,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-10-15 20:21:57,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 20:21:57,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-15 20:21:57,035 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-15 20:21:57,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:57,036 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-15 20:21:57,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:21:57,036 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-15 20:21:57,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:21:57,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:57,036 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:57,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-15 20:21:57,246 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:57,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:57,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-10-15 20:21:57,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:57,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231895266] [2020-10-15 20:21:57,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:57,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:57,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:57,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231895266] [2020-10-15 20:21:57,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394244225] [2020-10-15 20:21:57,303 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 [2020-10-15 20:21:57,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:57,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 20:21:57,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:57,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:57,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:57,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-15 20:21:57,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641765729] [2020-10-15 20:21:57,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 20:21:57,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:57,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 20:21:57,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:57,362 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-15 20:21:57,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:57,555 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-15 20:21:57,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:21:57,555 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-15 20:21:57,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:57,556 INFO L225 Difference]: With dead ends: 83 [2020-10-15 20:21:57,556 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 20:21:57,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:21:57,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 20:21:57,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-10-15 20:21:57,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 20:21:57,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-10-15 20:21:57,559 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-10-15 20:21:57,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:57,559 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-10-15 20:21:57,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 20:21:57,559 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-10-15 20:21:57,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:21:57,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:57,560 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:57,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:57,768 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:57,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:57,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-10-15 20:21:57,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:57,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141438668] [2020-10-15 20:21:57,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:57,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:57,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:57,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141438668] [2020-10-15 20:21:57,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668524217] [2020-10-15 20:21:57,823 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 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 [2020-10-15 20:21:57,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:57,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:57,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:57,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:57,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:57,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:57,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 20:21:57,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726018740] [2020-10-15 20:21:57,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:21:57,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:57,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:21:57,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:21:57,894 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-10-15 20:21:58,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:58,134 INFO L93 Difference]: Finished difference Result 62 states and 149 transitions. [2020-10-15 20:21:58,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:21:58,134 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 20:21:58,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:58,135 INFO L225 Difference]: With dead ends: 62 [2020-10-15 20:21:58,135 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 20:21:58,136 INFO L677 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 [2020-10-15 20:21:58,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 20:21:58,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-10-15 20:21:58,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-15 20:21:58,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-10-15 20:21:58,139 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-10-15 20:21:58,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:58,139 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-10-15 20:21:58,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:21:58,139 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-10-15 20:21:58,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:21:58,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:58,140 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:58,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-15 20:21:58,347 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:58,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:58,348 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-10-15 20:21:58,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:58,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433373399] [2020-10-15 20:21:58,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:58,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:58,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:58,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433373399] [2020-10-15 20:21:58,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722362136] [2020-10-15 20:21:58,401 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 [2020-10-15 20:21:58,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:21:58,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:58,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 20:21:58,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:58,494 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:21:58,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:58,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:58,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 20:21:58,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44740929] [2020-10-15 20:21:58,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:21:58,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:58,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:21:58,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:21:58,505 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-10-15 20:21:58,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:58,739 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-10-15 20:21:58,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:21:58,739 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 20:21:58,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:58,740 INFO L225 Difference]: With dead ends: 68 [2020-10-15 20:21:58,740 INFO L226 Difference]: Without dead ends: 63 [2020-10-15 20:21:58,740 INFO L677 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 [2020-10-15 20:21:58,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-15 20:21:58,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-10-15 20:21:58,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 20:21:58,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-15 20:21:58,743 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-10-15 20:21:58,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:58,743 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-15 20:21:58,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:21:58,743 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-15 20:21:58,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:58,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:58,744 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:58,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-15 20:21:58,945 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:58,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:58,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-10-15 20:21:58,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:58,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711869681] [2020-10-15 20:21:58,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:58,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:59,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:59,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711869681] [2020-10-15 20:21:59,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018167065] [2020-10-15 20:21:59,013 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 [2020-10-15 20:21:59,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:59,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:59,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:59,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:59,088 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:21:59,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:59,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:59,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 20:21:59,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393117039] [2020-10-15 20:21:59,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:21:59,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:59,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:21:59,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:21:59,106 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-10-15 20:21:59,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:59,438 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-10-15 20:21:59,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:21:59,439 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 20:21:59,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:59,440 INFO L225 Difference]: With dead ends: 60 [2020-10-15 20:21:59,440 INFO L226 Difference]: Without dead ends: 55 [2020-10-15 20:21:59,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:21:59,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-15 20:21:59,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-10-15 20:21:59,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 20:21:59,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-10-15 20:21:59,444 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-10-15 20:21:59,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:59,444 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-10-15 20:21:59,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:21:59,445 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-10-15 20:21:59,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:59,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:59,445 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:59,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:59,646 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:59,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:59,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-10-15 20:21:59,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:59,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902090308] [2020-10-15 20:21:59,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:59,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:59,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:59,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902090308] [2020-10-15 20:21:59,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704842399] [2020-10-15 20:21:59,732 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 [2020-10-15 20:21:59,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 20:21:59,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:59,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:59,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:59,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:59,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:59,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-15 20:21:59,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600899686] [2020-10-15 20:21:59,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:21:59,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:59,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:21:59,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:21:59,788 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-10-15 20:21:59,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:59,910 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-10-15 20:21:59,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 20:21:59,910 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-15 20:21:59,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:59,911 INFO L225 Difference]: With dead ends: 66 [2020-10-15 20:21:59,911 INFO L226 Difference]: Without dead ends: 60 [2020-10-15 20:21:59,911 INFO L677 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 [2020-10-15 20:21:59,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-15 20:21:59,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-10-15 20:21:59,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 20:21:59,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-10-15 20:21:59,913 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-10-15 20:21:59,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:59,914 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-10-15 20:21:59,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:21:59,915 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-10-15 20:21:59,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:59,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:59,916 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:00,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:00,126 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:00,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:00,126 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-10-15 20:22:00,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:00,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559843284] [2020-10-15 20:22:00,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:00,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:00,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:00,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559843284] [2020-10-15 20:22:00,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983527426] [2020-10-15 20:22:00,211 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 [2020-10-15 20:22:00,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 20:22:00,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:00,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:22:00,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:00,271 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:00,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:00,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:00,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 20:22:00,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128478388] [2020-10-15 20:22:00,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:22:00,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:00,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:22:00,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:22:00,284 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-10-15 20:22:00,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:00,440 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-10-15 20:22:00,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 20:22:00,440 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 20:22:00,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:00,441 INFO L225 Difference]: With dead ends: 74 [2020-10-15 20:22:00,441 INFO L226 Difference]: Without dead ends: 68 [2020-10-15 20:22:00,442 INFO L677 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 [2020-10-15 20:22:00,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-15 20:22:00,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-10-15 20:22:00,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-15 20:22:00,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-10-15 20:22:00,445 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-10-15 20:22:00,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:00,445 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-10-15 20:22:00,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:22:00,445 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-10-15 20:22:00,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:22:00,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:00,446 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:00,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-15 20:22:00,657 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:00,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:00,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-10-15 20:22:00,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:00,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17497613] [2020-10-15 20:22:00,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:00,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:00,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:00,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17497613] [2020-10-15 20:22:00,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931764744] [2020-10-15 20:22:00,728 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 [2020-10-15 20:22:00,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:00,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:22:00,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:00,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:00,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:00,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-15 20:22:00,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984738677] [2020-10-15 20:22:00,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:22:00,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:00,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:22:00,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:22:00,808 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-10-15 20:22:00,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:00,987 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-10-15 20:22:00,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:22:00,988 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-15 20:22:00,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:00,988 INFO L225 Difference]: With dead ends: 75 [2020-10-15 20:22:00,988 INFO L226 Difference]: Without dead ends: 69 [2020-10-15 20:22:00,989 INFO L677 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 [2020-10-15 20:22:00,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-15 20:22:00,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-10-15 20:22:00,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-15 20:22:00,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-15 20:22:00,992 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-10-15 20:22:00,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:00,992 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-15 20:22:00,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:22:00,993 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-15 20:22:00,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:22:00,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:00,994 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:01,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:01,202 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:01,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:01,202 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-10-15 20:22:01,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:01,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749010953] [2020-10-15 20:22:01,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:01,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:01,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:01,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749010953] [2020-10-15 20:22:01,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872154530] [2020-10-15 20:22:01,283 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 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 [2020-10-15 20:22:01,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:01,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:01,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:22:01,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:01,336 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:01,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:01,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:01,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 20:22:01,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560813807] [2020-10-15 20:22:01,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:22:01,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:01,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:22:01,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:22:01,349 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-10-15 20:22:01,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:01,584 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-10-15 20:22:01,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:22:01,584 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 20:22:01,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:01,585 INFO L225 Difference]: With dead ends: 79 [2020-10-15 20:22:01,585 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 20:22:01,586 INFO L677 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 [2020-10-15 20:22:01,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 20:22:01,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-10-15 20:22:01,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 20:22:01,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-15 20:22:01,588 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-10-15 20:22:01,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:01,588 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-15 20:22:01,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:22:01,588 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-15 20:22:01,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:22:01,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:01,589 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:01,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-15 20:22:01,790 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:01,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:01,790 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-10-15 20:22:01,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:01,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74055193] [2020-10-15 20:22:01,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:01,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:01,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:01,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74055193] [2020-10-15 20:22:01,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281305230] [2020-10-15 20:22:01,853 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 [2020-10-15 20:22:01,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 20:22:01,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:01,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:22:01,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:01,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:01,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:01,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-15 20:22:01,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184591431] [2020-10-15 20:22:01,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:22:01,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:01,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:22:01,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:22:01,923 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-10-15 20:22:02,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:02,141 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-10-15 20:22:02,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:22:02,142 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-15 20:22:02,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:02,142 INFO L225 Difference]: With dead ends: 79 [2020-10-15 20:22:02,143 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 20:22:02,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:22:02,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 20:22:02,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-10-15 20:22:02,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-15 20:22:02,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-10-15 20:22:02,146 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-10-15 20:22:02,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:02,146 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-10-15 20:22:02,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:22:02,146 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-10-15 20:22:02,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:22:02,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:02,147 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:02,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:02,356 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:02,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:02,356 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-10-15 20:22:02,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:02,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856502653] [2020-10-15 20:22:02,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:02,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:02,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:02,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856502653] [2020-10-15 20:22:02,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840937161] [2020-10-15 20:22:02,426 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 [2020-10-15 20:22:02,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:02,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:02,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:22:02,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:02,480 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:02,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:02,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:02,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 20:22:02,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689286369] [2020-10-15 20:22:02,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:22:02,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:02,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:22:02,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:22:02,498 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-10-15 20:22:02,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:02,820 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-10-15 20:22:02,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:22:02,821 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 20:22:02,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:02,822 INFO L225 Difference]: With dead ends: 76 [2020-10-15 20:22:02,822 INFO L226 Difference]: Without dead ends: 70 [2020-10-15 20:22:02,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:22:02,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-15 20:22:02,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-10-15 20:22:02,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 20:22:02,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-15 20:22:02,827 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-10-15 20:22:02,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:02,827 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-15 20:22:02,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:22:02,827 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-15 20:22:02,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:22:02,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:02,828 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:03,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-15 20:22:03,038 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:03,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:03,039 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-10-15 20:22:03,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:03,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72304102] [2020-10-15 20:22:03,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:03,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:03,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72304102] [2020-10-15 20:22:03,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723429723] [2020-10-15 20:22:03,101 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 [2020-10-15 20:22:03,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 20:22:03,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:03,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:22:03,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:03,161 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:03,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:03,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-15 20:22:03,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464672807] [2020-10-15 20:22:03,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:22:03,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:03,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:22:03,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:22:03,162 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-10-15 20:22:03,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:03,422 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-10-15 20:22:03,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:22:03,423 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-15 20:22:03,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:03,424 INFO L225 Difference]: With dead ends: 96 [2020-10-15 20:22:03,424 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 20:22:03,425 INFO L677 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 [2020-10-15 20:22:03,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 20:22:03,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-10-15 20:22:03,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 20:22:03,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-10-15 20:22:03,428 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-10-15 20:22:03,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:03,429 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-10-15 20:22:03,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:22:03,429 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-10-15 20:22:03,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:22:03,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:03,430 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:03,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-15 20:22:03,639 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:03,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:03,640 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-10-15 20:22:03,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:03,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866978819] [2020-10-15 20:22:03,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:03,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:03,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:03,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866978819] [2020-10-15 20:22:03,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961561399] [2020-10-15 20:22:03,721 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 [2020-10-15 20:22:03,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 20:22:03,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:03,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:22:03,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:03,784 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:03,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:03,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:03,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 20:22:03,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086022825] [2020-10-15 20:22:03,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:22:03,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:03,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:22:03,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:22:03,797 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-10-15 20:22:04,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:04,218 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-10-15 20:22:04,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:22:04,218 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 20:22:04,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:04,219 INFO L225 Difference]: With dead ends: 77 [2020-10-15 20:22:04,220 INFO L226 Difference]: Without dead ends: 69 [2020-10-15 20:22:04,220 INFO L677 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 [2020-10-15 20:22:04,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-15 20:22:04,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-10-15 20:22:04,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-15 20:22:04,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-15 20:22:04,224 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-15 20:22:04,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:04,224 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-15 20:22:04,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:22:04,225 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-15 20:22:04,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:22:04,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:04,226 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:04,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-15 20:22:04,435 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:04,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:04,436 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-10-15 20:22:04,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:04,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614568311] [2020-10-15 20:22:04,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:04,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:04,556 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:04,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614568311] [2020-10-15 20:22:04,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412517537] [2020-10-15 20:22:04,557 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 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 [2020-10-15 20:22:04,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:04,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:22:04,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:04,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:04,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:04,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-15 20:22:04,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114406631] [2020-10-15 20:22:04,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:22:04,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:04,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:22:04,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:22:04,616 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-10-15 20:22:04,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:04,768 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-15 20:22:04,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 20:22:04,772 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-15 20:22:04,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:04,772 INFO L225 Difference]: With dead ends: 84 [2020-10-15 20:22:04,773 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 20:22:04,773 INFO L677 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 [2020-10-15 20:22:04,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 20:22:04,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-10-15 20:22:04,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 20:22:04,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-15 20:22:04,776 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-15 20:22:04,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:04,776 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-15 20:22:04,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:22:04,776 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-15 20:22:04,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:22:04,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:04,777 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:04,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-15 20:22:04,978 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:04,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:04,978 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-10-15 20:22:04,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:04,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699951741] [2020-10-15 20:22:04,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:04,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:05,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:05,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699951741] [2020-10-15 20:22:05,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442345753] [2020-10-15 20:22:05,071 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 [2020-10-15 20:22:05,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:05,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:05,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:22:05,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:05,136 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:05,145 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:05,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:05,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 20:22:05,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294141693] [2020-10-15 20:22:05,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:22:05,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:05,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:22:05,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:22:05,146 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-15 20:22:05,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:05,377 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-10-15 20:22:05,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:22:05,377 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 20:22:05,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:05,378 INFO L225 Difference]: With dead ends: 81 [2020-10-15 20:22:05,378 INFO L226 Difference]: Without dead ends: 75 [2020-10-15 20:22:05,379 INFO L677 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 [2020-10-15 20:22:05,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-15 20:22:05,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-10-15 20:22:05,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 20:22:05,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-15 20:22:05,381 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-15 20:22:05,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:05,382 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-15 20:22:05,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:22:05,382 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-15 20:22:05,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:22:05,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:05,382 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:05,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-15 20:22:05,583 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:05,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:05,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-10-15 20:22:05,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:05,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132589417] [2020-10-15 20:22:05,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:05,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:05,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:05,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132589417] [2020-10-15 20:22:05,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987494153] [2020-10-15 20:22:05,695 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 [2020-10-15 20:22:05,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 20:22:05,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:05,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:22:05,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:05,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:05,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:05,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-15 20:22:05,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647350975] [2020-10-15 20:22:05,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:22:05,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:05,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:22:05,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:22:05,781 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-15 20:22:06,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:06,033 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-15 20:22:06,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:22:06,033 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-15 20:22:06,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:06,034 INFO L225 Difference]: With dead ends: 78 [2020-10-15 20:22:06,034 INFO L226 Difference]: Without dead ends: 72 [2020-10-15 20:22:06,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:22:06,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-15 20:22:06,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-10-15 20:22:06,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 20:22:06,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-15 20:22:06,037 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-15 20:22:06,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:06,037 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-15 20:22:06,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:22:06,037 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-15 20:22:06,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:22:06,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:06,037 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:06,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-15 20:22:06,247 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:06,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:06,247 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-10-15 20:22:06,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:06,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491373429] [2020-10-15 20:22:06,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:06,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:06,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:06,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491373429] [2020-10-15 20:22:06,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043822399] [2020-10-15 20:22:06,330 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 [2020-10-15 20:22:06,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:06,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:06,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:22:06,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:06,390 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:06,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:06,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:06,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 20:22:06,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86457135] [2020-10-15 20:22:06,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:22:06,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:06,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:22:06,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:22:06,400 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-15 20:22:06,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:06,709 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-15 20:22:06,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:22:06,710 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 20:22:06,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:06,710 INFO L225 Difference]: With dead ends: 77 [2020-10-15 20:22:06,711 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 20:22:06,711 INFO L677 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 [2020-10-15 20:22:06,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 20:22:06,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-10-15 20:22:06,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 20:22:06,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-15 20:22:06,713 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-15 20:22:06,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:06,713 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-15 20:22:06,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:22:06,714 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-15 20:22:06,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:22:06,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:06,714 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:06,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-15 20:22:06,920 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:06,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:06,920 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-10-15 20:22:06,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:06,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026853687] [2020-10-15 20:22:06,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:06,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:06,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:06,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026853687] [2020-10-15 20:22:06,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462633665] [2020-10-15 20:22:06,994 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 [2020-10-15 20:22:07,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 20:22:07,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:07,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:22:07,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:07,056 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:07,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:07,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-15 20:22:07,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327417860] [2020-10-15 20:22:07,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:22:07,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:07,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:22:07,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:22:07,058 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-15 20:22:07,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:07,303 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-10-15 20:22:07,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:22:07,304 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-15 20:22:07,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:07,305 INFO L225 Difference]: With dead ends: 74 [2020-10-15 20:22:07,305 INFO L226 Difference]: Without dead ends: 68 [2020-10-15 20:22:07,305 INFO L677 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 [2020-10-15 20:22:07,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-15 20:22:07,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-10-15 20:22:07,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 20:22:07,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-15 20:22:07,308 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-15 20:22:07,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:07,309 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-15 20:22:07,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:22:07,309 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-15 20:22:07,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:22:07,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:07,309 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:07,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:07,518 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:07,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:07,519 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-10-15 20:22:07,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:07,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557166740] [2020-10-15 20:22:07,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:07,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:07,594 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:07,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557166740] [2020-10-15 20:22:07,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146186671] [2020-10-15 20:22:07,595 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 [2020-10-15 20:22:07,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 20:22:07,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:07,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:22:07,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:07,653 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:07,664 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:07,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:07,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 20:22:07,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132031831] [2020-10-15 20:22:07,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:22:07,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:07,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:22:07,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:22:07,666 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-15 20:22:08,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:08,017 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-10-15 20:22:08,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:22:08,017 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 20:22:08,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:08,018 INFO L225 Difference]: With dead ends: 73 [2020-10-15 20:22:08,018 INFO L226 Difference]: Without dead ends: 67 [2020-10-15 20:22:08,019 INFO L677 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 [2020-10-15 20:22:08,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-15 20:22:08,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-10-15 20:22:08,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 20:22:08,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-15 20:22:08,022 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-15 20:22:08,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:08,023 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-15 20:22:08,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:22:08,023 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-15 20:22:08,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:22:08,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:08,023 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:08,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-15 20:22:08,232 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:08,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:08,232 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-10-15 20:22:08,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:08,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266631808] [2020-10-15 20:22:08,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:08,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:08,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266631808] [2020-10-15 20:22:08,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466802458] [2020-10-15 20:22:08,302 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 [2020-10-15 20:22:08,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:08,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:22:08,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:08,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:08,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:08,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-15 20:22:08,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065250894] [2020-10-15 20:22:08,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:22:08,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:08,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:22:08,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:22:08,357 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-15 20:22:08,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:08,641 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-15 20:22:08,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:22:08,641 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-15 20:22:08,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:08,642 INFO L225 Difference]: With dead ends: 89 [2020-10-15 20:22:08,642 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 20:22:08,643 INFO L677 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 [2020-10-15 20:22:08,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 20:22:08,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-15 20:22:08,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-15 20:22:08,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-10-15 20:22:08,645 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-10-15 20:22:08,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:08,646 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-10-15 20:22:08,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:22:08,646 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-10-15 20:22:08,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:22:08,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:08,646 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:08,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:08,854 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:08,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:08,854 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-10-15 20:22:08,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:08,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938914303] [2020-10-15 20:22:08,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:08,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:08,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:08,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938914303] [2020-10-15 20:22:08,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770355482] [2020-10-15 20:22:08,925 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 [2020-10-15 20:22:08,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:08,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:08,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:22:08,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:09,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:09,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:09,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 20:22:09,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892689768] [2020-10-15 20:22:09,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:22:09,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:09,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:22:09,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:22:09,012 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-10-15 20:22:09,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:09,370 INFO L93 Difference]: Finished difference Result 68 states and 165 transitions. [2020-10-15 20:22:09,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:22:09,371 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 20:22:09,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:09,371 INFO L225 Difference]: With dead ends: 68 [2020-10-15 20:22:09,372 INFO L226 Difference]: Without dead ends: 60 [2020-10-15 20:22:09,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:22:09,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-15 20:22:09,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2020-10-15 20:22:09,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-15 20:22:09,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-10-15 20:22:09,374 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-10-15 20:22:09,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:09,374 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-10-15 20:22:09,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:22:09,375 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-10-15 20:22:09,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:22:09,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:09,375 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:09,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-15 20:22:09,576 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:09,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:09,577 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-10-15 20:22:09,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:09,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735108789] [2020-10-15 20:22:09,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:09,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:09,653 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:09,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735108789] [2020-10-15 20:22:09,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410217282] [2020-10-15 20:22:09,654 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 [2020-10-15 20:22:09,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 20:22:09,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:09,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:22:09,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:09,739 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:22:09,752 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:09,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:09,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 20:22:09,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444177300] [2020-10-15 20:22:09,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:22:09,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:09,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:22:09,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:22:09,755 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-10-15 20:22:10,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:10,112 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-10-15 20:22:10,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:22:10,113 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 20:22:10,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:10,114 INFO L225 Difference]: With dead ends: 76 [2020-10-15 20:22:10,114 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 20:22:10,114 INFO L677 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 [2020-10-15 20:22:10,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 20:22:10,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-10-15 20:22:10,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 20:22:10,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-15 20:22:10,118 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-10-15 20:22:10,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:10,118 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-15 20:22:10,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:22:10,118 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-15 20:22:10,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:22:10,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:10,119 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:10,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:10,327 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:10,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:10,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-10-15 20:22:10,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:10,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24886752] [2020-10-15 20:22:10,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:10,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:10,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:10,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24886752] [2020-10-15 20:22:10,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881421784] [2020-10-15 20:22:10,408 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 [2020-10-15 20:22:10,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:10,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:10,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:22:10,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:10,480 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:22:10,498 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:10,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:10,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 20:22:10,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773828754] [2020-10-15 20:22:10,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:22:10,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:10,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:22:10,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:22:10,501 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-10-15 20:22:10,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:10,888 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-10-15 20:22:10,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:22:10,889 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 20:22:10,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:10,889 INFO L225 Difference]: With dead ends: 66 [2020-10-15 20:22:10,890 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 20:22:10,890 INFO L677 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 [2020-10-15 20:22:10,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 20:22:10,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-10-15 20:22:10,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 20:22:10,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-10-15 20:22:10,892 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-10-15 20:22:10,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:10,893 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-10-15 20:22:10,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:22:10,893 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-10-15 20:22:10,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:22:10,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:10,893 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:11,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-15 20:22:11,102 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:11,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:11,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-10-15 20:22:11,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:11,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563208464] [2020-10-15 20:22:11,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:11,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:11,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:11,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563208464] [2020-10-15 20:22:11,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133610002] [2020-10-15 20:22:11,205 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 [2020-10-15 20:22:11,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 20:22:11,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:11,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:22:11,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:11,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:11,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:11,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 20:22:11,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729120095] [2020-10-15 20:22:11,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:22:11,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:11,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:22:11,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:22:11,257 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-10-15 20:22:11,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:11,439 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-10-15 20:22:11,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 20:22:11,440 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 20:22:11,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:11,440 INFO L225 Difference]: With dead ends: 72 [2020-10-15 20:22:11,441 INFO L226 Difference]: Without dead ends: 66 [2020-10-15 20:22:11,441 INFO L677 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 [2020-10-15 20:22:11,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-15 20:22:11,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-15 20:22:11,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 20:22:11,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-10-15 20:22:11,444 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-10-15 20:22:11,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:11,445 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-10-15 20:22:11,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:22:11,445 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-10-15 20:22:11,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:22:11,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:11,445 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:11,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-15 20:22:11,655 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:11,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:11,655 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-10-15 20:22:11,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:11,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262302004] [2020-10-15 20:22:11,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:11,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:11,756 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:11,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262302004] [2020-10-15 20:22:11,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744778518] [2020-10-15 20:22:11,757 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 [2020-10-15 20:22:11,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-15 20:22:11,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:11,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:22:11,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:11,826 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:11,837 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:11,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:11,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 20:22:11,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719873331] [2020-10-15 20:22:11,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:22:11,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:11,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:22:11,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:22:11,838 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-10-15 20:22:12,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:12,023 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-10-15 20:22:12,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:22:12,023 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 20:22:12,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:12,024 INFO L225 Difference]: With dead ends: 82 [2020-10-15 20:22:12,024 INFO L226 Difference]: Without dead ends: 76 [2020-10-15 20:22:12,025 INFO L677 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 [2020-10-15 20:22:12,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-15 20:22:12,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-10-15 20:22:12,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 20:22:12,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-10-15 20:22:12,027 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-10-15 20:22:12,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:12,027 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-10-15 20:22:12,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:22:12,028 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-10-15 20:22:12,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:22:12,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:12,028 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:12,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-15 20:22:12,238 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:12,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:12,238 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-10-15 20:22:12,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:12,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886452879] [2020-10-15 20:22:12,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:12,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:12,331 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:12,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886452879] [2020-10-15 20:22:12,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094506593] [2020-10-15 20:22:12,332 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 [2020-10-15 20:22:12,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:12,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:22:12,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:12,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:12,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:12,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 20:22:12,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113422328] [2020-10-15 20:22:12,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:22:12,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:12,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:22:12,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:22:12,394 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-10-15 20:22:12,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:12,623 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-10-15 20:22:12,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:22:12,623 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 20:22:12,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:12,624 INFO L225 Difference]: With dead ends: 83 [2020-10-15 20:22:12,625 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 20:22:12,625 INFO L677 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 [2020-10-15 20:22:12,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 20:22:12,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-10-15 20:22:12,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-15 20:22:12,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-10-15 20:22:12,629 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-10-15 20:22:12,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:12,629 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-10-15 20:22:12,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:22:12,629 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-10-15 20:22:12,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:22:12,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:12,630 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:12,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-15 20:22:12,840 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:12,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:12,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-10-15 20:22:12,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:12,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422113721] [2020-10-15 20:22:12,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:12,946 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:12,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422113721] [2020-10-15 20:22:12,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469342883] [2020-10-15 20:22:12,947 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 [2020-10-15 20:22:13,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:13,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:13,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:22:13,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:13,039 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:13,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:13,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:13,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 20:22:13,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094079994] [2020-10-15 20:22:13,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:22:13,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:13,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:22:13,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:22:13,057 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-10-15 20:22:13,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:13,425 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-10-15 20:22:13,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:22:13,428 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 20:22:13,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:13,429 INFO L225 Difference]: With dead ends: 89 [2020-10-15 20:22:13,429 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 20:22:13,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:22:13,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 20:22:13,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-10-15 20:22:13,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 20:22:13,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-10-15 20:22:13,437 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-10-15 20:22:13,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:13,437 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-10-15 20:22:13,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:22:13,437 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-10-15 20:22:13,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:22:13,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:13,438 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:13,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:13,649 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:13,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:13,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-10-15 20:22:13,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:13,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987590403] [2020-10-15 20:22:13,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:13,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:13,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:13,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987590403] [2020-10-15 20:22:13,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516621992] [2020-10-15 20:22:13,783 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 [2020-10-15 20:22:13,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-15 20:22:13,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:13,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:22:13,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:13,850 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:13,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:13,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 20:22:13,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615719752] [2020-10-15 20:22:13,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:22:13,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:13,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:22:13,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:22:13,851 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-10-15 20:22:14,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:14,112 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-10-15 20:22:14,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:22:14,113 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 20:22:14,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:14,114 INFO L225 Difference]: With dead ends: 89 [2020-10-15 20:22:14,114 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 20:22:14,114 INFO L677 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 [2020-10-15 20:22:14,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 20:22:14,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-10-15 20:22:14,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 20:22:14,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-15 20:22:14,118 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-10-15 20:22:14,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:14,118 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-15 20:22:14,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:22:14,118 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-15 20:22:14,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:22:14,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:14,119 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:14,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:14,328 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:14,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:14,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-10-15 20:22:14,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:14,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983699760] [2020-10-15 20:22:14,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:14,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:14,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:14,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983699760] [2020-10-15 20:22:14,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187151712] [2020-10-15 20:22:14,419 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 [2020-10-15 20:22:14,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:14,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:14,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:22:14,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:14,472 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:14,481 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:14,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:14,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 20:22:14,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001870238] [2020-10-15 20:22:14,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:22:14,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:14,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:22:14,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:22:14,484 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-10-15 20:22:14,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:14,875 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-10-15 20:22:14,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:22:14,875 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 20:22:14,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:14,876 INFO L225 Difference]: With dead ends: 86 [2020-10-15 20:22:14,876 INFO L226 Difference]: Without dead ends: 80 [2020-10-15 20:22:14,876 INFO L677 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 [2020-10-15 20:22:14,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-15 20:22:14,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-10-15 20:22:14,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 20:22:14,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-15 20:22:14,879 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-10-15 20:22:14,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:14,879 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-15 20:22:14,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:22:14,879 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-15 20:22:14,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:22:14,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:14,880 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:15,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-15 20:22:15,081 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:15,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:15,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-10-15 20:22:15,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:15,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89868097] [2020-10-15 20:22:15,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:15,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:15,162 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:15,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89868097] [2020-10-15 20:22:15,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591316841] [2020-10-15 20:22:15,163 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 [2020-10-15 20:22:15,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 20:22:15,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:15,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:22:15,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:15,220 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:15,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:15,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 20:22:15,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086457921] [2020-10-15 20:22:15,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:22:15,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:15,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:22:15,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:22:15,222 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-10-15 20:22:15,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:15,548 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-10-15 20:22:15,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 20:22:15,549 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 20:22:15,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:15,550 INFO L225 Difference]: With dead ends: 87 [2020-10-15 20:22:15,550 INFO L226 Difference]: Without dead ends: 81 [2020-10-15 20:22:15,551 INFO L677 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 [2020-10-15 20:22:15,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-15 20:22:15,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-10-15 20:22:15,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-15 20:22:15,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-10-15 20:22:15,555 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-10-15 20:22:15,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:15,555 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-10-15 20:22:15,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:22:15,555 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-10-15 20:22:15,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:22:15,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:15,556 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:15,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:15,767 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:15,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:15,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-10-15 20:22:15,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:15,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604616566] [2020-10-15 20:22:15,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:15,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:15,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:15,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604616566] [2020-10-15 20:22:15,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672730803] [2020-10-15 20:22:15,850 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 [2020-10-15 20:22:15,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-15 20:22:15,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:15,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:22:15,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:15,913 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:15,924 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:15,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:15,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 20:22:15,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345289570] [2020-10-15 20:22:15,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:22:15,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:15,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:22:15,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:22:15,926 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-10-15 20:22:16,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:16,308 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-10-15 20:22:16,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:22:16,309 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 20:22:16,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:16,309 INFO L225 Difference]: With dead ends: 84 [2020-10-15 20:22:16,310 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 20:22:16,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:22:16,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 20:22:16,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-10-15 20:22:16,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 20:22:16,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-15 20:22:16,313 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-10-15 20:22:16,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:16,314 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-15 20:22:16,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:22:16,314 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-15 20:22:16,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:22:16,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:16,314 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:16,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-15 20:22:16,517 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:16,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:16,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-10-15 20:22:16,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:16,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419714810] [2020-10-15 20:22:16,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:16,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:16,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:16,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419714810] [2020-10-15 20:22:16,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499852468] [2020-10-15 20:22:16,588 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 [2020-10-15 20:22:16,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:16,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:22:16,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:16,667 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:16,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:16,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 20:22:16,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819539486] [2020-10-15 20:22:16,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:22:16,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:16,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:22:16,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:22:16,668 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-10-15 20:22:17,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:17,010 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-15 20:22:17,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:22:17,014 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 20:22:17,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:17,015 INFO L225 Difference]: With dead ends: 104 [2020-10-15 20:22:17,015 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 20:22:17,016 INFO L677 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 [2020-10-15 20:22:17,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 20:22:17,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-10-15 20:22:17,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 20:22:17,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-10-15 20:22:17,018 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-10-15 20:22:17,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:17,018 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-10-15 20:22:17,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:22:17,018 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-10-15 20:22:17,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:22:17,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:17,019 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:17,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-15 20:22:17,220 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:17,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:17,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-10-15 20:22:17,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:17,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498503555] [2020-10-15 20:22:17,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:17,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:17,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:17,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498503555] [2020-10-15 20:22:17,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226333556] [2020-10-15 20:22:17,293 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 [2020-10-15 20:22:17,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:17,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:17,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:22:17,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:17,375 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:17,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:17,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:17,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 20:22:17,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923274927] [2020-10-15 20:22:17,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:22:17,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:17,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:22:17,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:22:17,386 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-10-15 20:22:17,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:17,811 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-10-15 20:22:17,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:22:17,811 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 20:22:17,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:17,812 INFO L225 Difference]: With dead ends: 85 [2020-10-15 20:22:17,812 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 20:22:17,813 INFO L677 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 [2020-10-15 20:22:17,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 20:22:17,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-10-15 20:22:17,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-15 20:22:17,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-15 20:22:17,815 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-15 20:22:17,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:17,815 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-15 20:22:17,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:22:17,816 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-15 20:22:17,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:22:17,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:17,816 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:18,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-15 20:22:18,019 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:18,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:18,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-10-15 20:22:18,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:18,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925464275] [2020-10-15 20:22:18,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:18,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:18,134 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:18,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925464275] [2020-10-15 20:22:18,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431047611] [2020-10-15 20:22:18,135 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 [2020-10-15 20:22:18,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-15 20:22:18,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:18,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:22:18,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:18,193 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:18,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:18,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 20:22:18,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790183401] [2020-10-15 20:22:18,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:22:18,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:18,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:22:18,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:22:18,195 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-10-15 20:22:18,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:18,406 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-15 20:22:18,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:22:18,407 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 20:22:18,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:18,408 INFO L225 Difference]: With dead ends: 94 [2020-10-15 20:22:18,408 INFO L226 Difference]: Without dead ends: 88 [2020-10-15 20:22:18,408 INFO L677 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 [2020-10-15 20:22:18,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-15 20:22:18,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-10-15 20:22:18,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 20:22:18,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 20:22:18,413 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-15 20:22:18,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:18,413 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 20:22:18,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:22:18,414 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 20:22:18,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:22:18,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:18,414 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:18,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-15 20:22:18,622 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:18,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:18,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-10-15 20:22:18,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:18,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715441007] [2020-10-15 20:22:18,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:18,741 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:18,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715441007] [2020-10-15 20:22:18,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129913509] [2020-10-15 20:22:18,742 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 [2020-10-15 20:22:18,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:18,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:18,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:22:18,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:18,800 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:18,811 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:18,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:18,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 20:22:18,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908425504] [2020-10-15 20:22:18,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:22:18,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:18,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:22:18,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:22:18,813 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-15 20:22:19,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:19,094 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-10-15 20:22:19,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:22:19,095 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 20:22:19,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:19,096 INFO L225 Difference]: With dead ends: 91 [2020-10-15 20:22:19,096 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 20:22:19,097 INFO L677 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 [2020-10-15 20:22:19,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 20:22:19,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-15 20:22:19,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 20:22:19,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 20:22:19,100 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-15 20:22:19,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:19,100 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 20:22:19,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:22:19,100 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 20:22:19,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:22:19,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:19,101 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:19,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-15 20:22:19,308 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:19,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:19,308 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-10-15 20:22:19,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:19,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931858889] [2020-10-15 20:22:19,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:19,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:19,418 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:19,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931858889] [2020-10-15 20:22:19,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355497802] [2020-10-15 20:22:19,419 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 [2020-10-15 20:22:19,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 20:22:19,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:19,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:22:19,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:19,476 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:19,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:19,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 20:22:19,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666563001] [2020-10-15 20:22:19,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:22:19,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:19,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:22:19,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:22:19,478 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-15 20:22:19,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:19,734 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-15 20:22:19,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:22:19,735 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 20:22:19,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:19,735 INFO L225 Difference]: With dead ends: 88 [2020-10-15 20:22:19,736 INFO L226 Difference]: Without dead ends: 82 [2020-10-15 20:22:19,736 INFO L677 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 [2020-10-15 20:22:19,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-15 20:22:19,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-10-15 20:22:19,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 20:22:19,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 20:22:19,739 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-15 20:22:19,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:19,739 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 20:22:19,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:22:19,739 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 20:22:19,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:22:19,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:19,740 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:19,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:19,948 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:19,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:19,949 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-10-15 20:22:19,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:19,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726018285] [2020-10-15 20:22:19,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:19,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:20,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726018285] [2020-10-15 20:22:20,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543493029] [2020-10-15 20:22:20,052 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 [2020-10-15 20:22:20,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-15 20:22:20,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:20,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:22:20,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:20,152 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:20,167 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:20,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:20,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 20:22:20,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246997191] [2020-10-15 20:22:20,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:22:20,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:20,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:22:20,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:22:20,169 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-15 20:22:20,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:20,502 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-10-15 20:22:20,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:22:20,502 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 20:22:20,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:20,503 INFO L225 Difference]: With dead ends: 87 [2020-10-15 20:22:20,504 INFO L226 Difference]: Without dead ends: 81 [2020-10-15 20:22:20,504 INFO L677 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 [2020-10-15 20:22:20,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-15 20:22:20,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-10-15 20:22:20,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 20:22:20,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 20:22:20,508 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-15 20:22:20,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:20,508 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 20:22:20,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:22:20,509 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 20:22:20,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:22:20,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:20,509 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:20,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:20,714 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:20,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:20,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-10-15 20:22:20,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:20,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616051480] [2020-10-15 20:22:20,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:20,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:20,804 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:20,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616051480] [2020-10-15 20:22:20,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709434188] [2020-10-15 20:22:20,805 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 [2020-10-15 20:22:20,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:20,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:22:20,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:20,878 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:20,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:20,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 20:22:20,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488960512] [2020-10-15 20:22:20,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:22:20,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:20,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:22:20,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:22:20,880 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-15 20:22:21,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:21,164 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-15 20:22:21,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:22:21,164 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 20:22:21,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:21,165 INFO L225 Difference]: With dead ends: 84 [2020-10-15 20:22:21,165 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 20:22:21,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:22:21,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 20:22:21,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-10-15 20:22:21,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 20:22:21,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 20:22:21,168 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-15 20:22:21,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:21,168 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 20:22:21,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:22:21,168 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 20:22:21,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:22:21,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:21,169 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:21,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-10-15 20:22:21,371 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:21,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:21,371 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-10-15 20:22:21,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:21,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976172739] [2020-10-15 20:22:21,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:21,472 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:21,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976172739] [2020-10-15 20:22:21,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47264419] [2020-10-15 20:22:21,472 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 [2020-10-15 20:22:21,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:21,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:21,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:22:21,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:21,531 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:21,540 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:21,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:21,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 20:22:21,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214042876] [2020-10-15 20:22:21,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:22:21,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:21,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:22:21,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:22:21,542 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-15 20:22:21,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:21,940 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-15 20:22:21,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:22:21,940 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 20:22:21,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:21,941 INFO L225 Difference]: With dead ends: 83 [2020-10-15 20:22:21,941 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 20:22:21,942 INFO L677 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 [2020-10-15 20:22:21,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 20:22:21,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-10-15 20:22:21,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 20:22:21,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 20:22:21,944 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-15 20:22:21,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:21,944 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 20:22:21,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:22:21,944 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 20:22:21,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:22:21,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:21,945 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:22,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:22,149 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:22,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:22,149 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-10-15 20:22:22,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:22,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883137255] [2020-10-15 20:22:22,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:22,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:22,243 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:22,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883137255] [2020-10-15 20:22:22,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330884376] [2020-10-15 20:22:22,244 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 [2020-10-15 20:22:22,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-15 20:22:22,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:22,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:22:22,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:22,301 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:22,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:22,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 20:22:22,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283460994] [2020-10-15 20:22:22,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:22:22,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:22,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:22:22,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:22:22,302 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-15 20:22:22,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:22,642 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-10-15 20:22:22,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 20:22:22,643 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 20:22:22,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:22,643 INFO L225 Difference]: With dead ends: 80 [2020-10-15 20:22:22,644 INFO L226 Difference]: Without dead ends: 74 [2020-10-15 20:22:22,644 INFO L677 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 [2020-10-15 20:22:22,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-15 20:22:22,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-10-15 20:22:22,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 20:22:22,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 20:22:22,648 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-15 20:22:22,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:22,648 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 20:22:22,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:22:22,648 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 20:22:22,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:22:22,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:22,649 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:22,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-10-15 20:22:22,853 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:22,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:22,853 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-10-15 20:22:22,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:22,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713401231] [2020-10-15 20:22:22,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:22,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:22,955 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:22,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713401231] [2020-10-15 20:22:22,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090842499] [2020-10-15 20:22:22,955 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 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 [2020-10-15 20:22:22,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:22,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:22,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:22:22,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:23,018 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:23,027 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:23,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:23,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 20:22:23,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638973123] [2020-10-15 20:22:23,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:22:23,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:23,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:22:23,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:22:23,029 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-15 20:22:23,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:23,505 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-10-15 20:22:23,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:22:23,505 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 20:22:23,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:23,506 INFO L225 Difference]: With dead ends: 79 [2020-10-15 20:22:23,506 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 20:22:23,507 INFO L677 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 [2020-10-15 20:22:23,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 20:22:23,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-10-15 20:22:23,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 20:22:23,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 20:22:23,509 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-15 20:22:23,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:23,509 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 20:22:23,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:22:23,510 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 20:22:23,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:22:23,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:23,510 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:23,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:23,714 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:23,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:23,714 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-10-15 20:22:23,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:23,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303781591] [2020-10-15 20:22:23,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:23,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:23,794 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:23,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303781591] [2020-10-15 20:22:23,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399315868] [2020-10-15 20:22:23,795 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 [2020-10-15 20:22:23,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 20:22:23,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:23,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:22:23,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:23,889 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:23,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:23,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 20:22:23,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159827521] [2020-10-15 20:22:23,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:22:23,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:23,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:22:23,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:22:23,891 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-15 20:22:24,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:24,281 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-15 20:22:24,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:22:24,282 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 20:22:24,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:24,283 INFO L225 Difference]: With dead ends: 95 [2020-10-15 20:22:24,283 INFO L226 Difference]: Without dead ends: 89 [2020-10-15 20:22:24,283 INFO L677 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 [2020-10-15 20:22:24,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-15 20:22:24,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-10-15 20:22:24,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 20:22:24,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-10-15 20:22:24,286 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-10-15 20:22:24,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:24,287 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-10-15 20:22:24,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:22:24,287 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-10-15 20:22:24,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:22:24,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:24,287 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:24,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-10-15 20:22:24,495 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:24,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:24,495 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-10-15 20:22:24,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:24,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622033488] [2020-10-15 20:22:24,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:24,584 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:24,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622033488] [2020-10-15 20:22:24,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925242796] [2020-10-15 20:22:24,585 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 [2020-10-15 20:22:24,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-15 20:22:24,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:24,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:22:24,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:24,655 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:24,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:24,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 20:22:24,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556445822] [2020-10-15 20:22:24,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:22:24,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:24,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:22:24,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:22:24,657 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-10-15 20:22:25,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:25,113 INFO L93 Difference]: Finished difference Result 74 states and 181 transitions. [2020-10-15 20:22:25,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:22:25,114 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 20:22:25,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:25,114 INFO L225 Difference]: With dead ends: 74 [2020-10-15 20:22:25,114 INFO L226 Difference]: Without dead ends: 66 [2020-10-15 20:22:25,115 INFO L677 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 [2020-10-15 20:22:25,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-15 20:22:25,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 49. [2020-10-15 20:22:25,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-15 20:22:25,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-10-15 20:22:25,117 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-10-15 20:22:25,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:25,117 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-10-15 20:22:25,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:22:25,117 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-10-15 20:22:25,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:22:25,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:25,118 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:25,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:25,318 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:25,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:25,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-10-15 20:22:25,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:25,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664393868] [2020-10-15 20:22:25,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:25,408 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:25,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664393868] [2020-10-15 20:22:25,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845299107] [2020-10-15 20:22:25,408 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 [2020-10-15 20:22:25,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:25,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:22:25,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:25,464 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:22:25,477 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:25,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:25,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 20:22:25,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063914984] [2020-10-15 20:22:25,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:22:25,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:25,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:22:25,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:22:25,479 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-10-15 20:22:25,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:25,950 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-10-15 20:22:25,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:22:25,951 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 20:22:25,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:25,952 INFO L225 Difference]: With dead ends: 84 [2020-10-15 20:22:25,952 INFO L226 Difference]: Without dead ends: 79 [2020-10-15 20:22:25,952 INFO L677 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 [2020-10-15 20:22:25,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-15 20:22:25,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-10-15 20:22:25,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 20:22:25,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-15 20:22:25,955 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-10-15 20:22:25,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:25,955 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-15 20:22:25,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:22:25,955 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-15 20:22:25,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:22:25,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:25,955 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:26,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-15 20:22:26,156 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:26,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:26,157 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-10-15 20:22:26,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:26,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18833063] [2020-10-15 20:22:26,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:26,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:26,256 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:26,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18833063] [2020-10-15 20:22:26,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805946760] [2020-10-15 20:22:26,257 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 [2020-10-15 20:22:26,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:26,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:26,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:22:26,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:26,317 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:22:26,329 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:26,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:26,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 20:22:26,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990564037] [2020-10-15 20:22:26,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:22:26,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:26,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:22:26,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:22:26,331 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-10-15 20:22:26,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:26,845 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-10-15 20:22:26,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:22:26,846 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 20:22:26,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:26,847 INFO L225 Difference]: With dead ends: 72 [2020-10-15 20:22:26,847 INFO L226 Difference]: Without dead ends: 67 [2020-10-15 20:22:26,847 INFO L677 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 [2020-10-15 20:22:26,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-15 20:22:26,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-10-15 20:22:26,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 20:22:26,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-10-15 20:22:26,849 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-10-15 20:22:26,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:26,849 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-10-15 20:22:26,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:22:26,850 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-10-15 20:22:26,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:22:26,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:26,850 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:27,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-15 20:22:27,051 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:27,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:27,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-10-15 20:22:27,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:27,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499559237] [2020-10-15 20:22:27,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:27,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:27,177 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:27,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499559237] [2020-10-15 20:22:27,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487725978] [2020-10-15 20:22:27,178 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 [2020-10-15 20:22:27,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 20:22:27,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:27,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:22:27,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:27,272 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:27,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:27,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 20:22:27,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576674231] [2020-10-15 20:22:27,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:22:27,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:27,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:22:27,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:22:27,273 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-10-15 20:22:27,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:27,476 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-10-15 20:22:27,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:22:27,476 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 20:22:27,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:27,477 INFO L225 Difference]: With dead ends: 78 [2020-10-15 20:22:27,477 INFO L226 Difference]: Without dead ends: 72 [2020-10-15 20:22:27,478 INFO L677 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 [2020-10-15 20:22:27,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-15 20:22:27,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-10-15 20:22:27,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 20:22:27,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-10-15 20:22:27,480 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-10-15 20:22:27,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:27,480 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-10-15 20:22:27,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:22:27,481 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-10-15 20:22:27,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:22:27,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:27,481 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:27,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:27,682 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:27,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:27,683 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-10-15 20:22:27,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:27,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952370806] [2020-10-15 20:22:27,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:27,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:27,812 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:27,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952370806] [2020-10-15 20:22:27,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808162873] [2020-10-15 20:22:27,813 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 [2020-10-15 20:22:27,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:27,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:27,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:22:27,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:27,872 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:27,880 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:27,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:27,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 20:22:27,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014408263] [2020-10-15 20:22:27,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:22:27,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:27,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:22:27,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:22:27,882 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-10-15 20:22:28,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:28,132 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-10-15 20:22:28,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:22:28,133 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 20:22:28,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:28,134 INFO L225 Difference]: With dead ends: 90 [2020-10-15 20:22:28,134 INFO L226 Difference]: Without dead ends: 84 [2020-10-15 20:22:28,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:22:28,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-15 20:22:28,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-10-15 20:22:28,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 20:22:28,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-10-15 20:22:28,137 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-10-15 20:22:28,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:28,137 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-10-15 20:22:28,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:22:28,137 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-10-15 20:22:28,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:22:28,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:28,138 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:28,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:28,347 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:28,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:28,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-10-15 20:22:28,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:28,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113547355] [2020-10-15 20:22:28,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:28,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:28,484 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:28,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113547355] [2020-10-15 20:22:28,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113126746] [2020-10-15 20:22:28,485 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 [2020-10-15 20:22:28,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-15 20:22:28,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:28,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:22:28,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:28,539 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:28,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:28,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 20:22:28,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194270126] [2020-10-15 20:22:28,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:22:28,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:28,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:22:28,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:22:28,541 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-10-15 20:22:28,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:28,804 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-10-15 20:22:28,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:22:28,804 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 20:22:28,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:28,805 INFO L225 Difference]: With dead ends: 91 [2020-10-15 20:22:28,805 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 20:22:28,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:22:28,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 20:22:28,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-10-15 20:22:28,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-15 20:22:28,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-10-15 20:22:28,807 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-10-15 20:22:28,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:28,808 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-10-15 20:22:28,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:22:28,808 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-10-15 20:22:28,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:22:28,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:28,808 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:29,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:29,014 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:29,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:29,015 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-10-15 20:22:29,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:29,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646111591] [2020-10-15 20:22:29,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:29,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:29,131 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:29,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646111591] [2020-10-15 20:22:29,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935284621] [2020-10-15 20:22:29,132 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 [2020-10-15 20:22:29,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-15 20:22:29,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:29,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:22:29,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:29,199 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:29,212 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:29,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:29,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 20:22:29,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095158168] [2020-10-15 20:22:29,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:22:29,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:29,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:22:29,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:22:29,213 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-10-15 20:22:29,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:29,538 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-10-15 20:22:29,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:22:29,539 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 20:22:29,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:29,539 INFO L225 Difference]: With dead ends: 99 [2020-10-15 20:22:29,540 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 20:22:29,540 INFO L677 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 [2020-10-15 20:22:29,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 20:22:29,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-10-15 20:22:29,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 20:22:29,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-10-15 20:22:29,543 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-10-15 20:22:29,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:29,543 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-10-15 20:22:29,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:22:29,543 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-10-15 20:22:29,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:22:29,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:29,544 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:29,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:29,752 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:29,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:29,752 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-10-15 20:22:29,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:29,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268193095] [2020-10-15 20:22:29,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:29,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:29,859 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:29,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268193095] [2020-10-15 20:22:29,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398368584] [2020-10-15 20:22:29,860 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 [2020-10-15 20:22:29,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:29,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:22:29,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:29,915 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:29,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:29,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 20:22:29,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223202125] [2020-10-15 20:22:29,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:22:29,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:29,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:22:29,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:22:29,916 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-10-15 20:22:30,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:30,246 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-15 20:22:30,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 20:22:30,247 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 20:22:30,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:30,247 INFO L225 Difference]: With dead ends: 99 [2020-10-15 20:22:30,248 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 20:22:30,248 INFO L677 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 [2020-10-15 20:22:30,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 20:22:30,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-10-15 20:22:30,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-15 20:22:30,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-10-15 20:22:30,250 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-10-15 20:22:30,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:30,251 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-10-15 20:22:30,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:22:30,251 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-10-15 20:22:30,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:22:30,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:30,251 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:30,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-10-15 20:22:30,452 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:30,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:30,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-10-15 20:22:30,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:30,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29292204] [2020-10-15 20:22:30,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:30,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:30,559 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:30,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29292204] [2020-10-15 20:22:30,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139195414] [2020-10-15 20:22:30,560 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 [2020-10-15 20:22:30,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:30,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:30,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:22:30,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:30,619 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:30,630 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:30,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:30,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 20:22:30,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726731372] [2020-10-15 20:22:30,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:22:30,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:30,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:22:30,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:22:30,631 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-10-15 20:22:31,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:31,035 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-10-15 20:22:31,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:22:31,035 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 20:22:31,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:31,036 INFO L225 Difference]: With dead ends: 96 [2020-10-15 20:22:31,036 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 20:22:31,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 20:22:31,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 20:22:31,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-10-15 20:22:31,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-15 20:22:31,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-10-15 20:22:31,040 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-10-15 20:22:31,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:31,040 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-10-15 20:22:31,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:22:31,040 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-10-15 20:22:31,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:22:31,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:31,040 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:31,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:31,241 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:31,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:31,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-10-15 20:22:31,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:31,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742985757] [2020-10-15 20:22:31,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:31,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:31,351 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:31,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742985757] [2020-10-15 20:22:31,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406043193] [2020-10-15 20:22:31,352 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 [2020-10-15 20:22:31,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 20:22:31,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:31,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:22:31,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:31,414 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:31,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:31,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 20:22:31,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800023550] [2020-10-15 20:22:31,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:22:31,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:31,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:22:31,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:22:31,415 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-10-15 20:22:31,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:31,786 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-10-15 20:22:31,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:22:31,787 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 20:22:31,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:31,788 INFO L225 Difference]: With dead ends: 97 [2020-10-15 20:22:31,788 INFO L226 Difference]: Without dead ends: 91 [2020-10-15 20:22:31,788 INFO L677 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 [2020-10-15 20:22:31,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-15 20:22:31,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-10-15 20:22:31,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 20:22:31,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 20:22:31,791 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-10-15 20:22:31,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:31,791 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 20:22:31,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:22:31,791 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 20:22:31,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:22:31,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:31,792 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:31,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-10-15 20:22:31,997 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:31,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:31,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-10-15 20:22:31,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:31,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707263489] [2020-10-15 20:22:31,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:32,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:32,100 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:32,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707263489] [2020-10-15 20:22:32,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743717209] [2020-10-15 20:22:32,101 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 [2020-10-15 20:22:32,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:32,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:32,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:22:32,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:32,207 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:32,221 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:32,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:32,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 20:22:32,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317164515] [2020-10-15 20:22:32,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:22:32,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:32,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:22:32,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:22:32,223 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-10-15 20:22:32,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:32,786 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-15 20:22:32,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:22:32,787 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 20:22:32,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:32,788 INFO L225 Difference]: With dead ends: 94 [2020-10-15 20:22:32,789 INFO L226 Difference]: Without dead ends: 88 [2020-10-15 20:22:32,789 INFO L677 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 [2020-10-15 20:22:32,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-15 20:22:32,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-10-15 20:22:32,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 20:22:32,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 20:22:32,792 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-10-15 20:22:32,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:32,793 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 20:22:32,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:22:32,793 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 20:22:32,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:22:32,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:32,794 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:33,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:33,003 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:33,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:33,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-10-15 20:22:33,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:33,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136437334] [2020-10-15 20:22:33,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:33,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:33,146 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:33,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136437334] [2020-10-15 20:22:33,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004040907] [2020-10-15 20:22:33,147 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 [2020-10-15 20:22:33,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-15 20:22:33,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:33,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:22:33,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:33,263 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:33,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:33,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 20:22:33,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524181710] [2020-10-15 20:22:33,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:22:33,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:33,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:22:33,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:22:33,267 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-10-15 20:22:33,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:33,798 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-10-15 20:22:33,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:22:33,799 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 20:22:33,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:33,800 INFO L225 Difference]: With dead ends: 95 [2020-10-15 20:22:33,800 INFO L226 Difference]: Without dead ends: 89 [2020-10-15 20:22:33,800 INFO L677 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 [2020-10-15 20:22:33,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-15 20:22:33,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-10-15 20:22:33,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-15 20:22:33,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-10-15 20:22:33,803 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-10-15 20:22:33,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:33,803 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-10-15 20:22:33,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:22:33,803 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-10-15 20:22:33,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:22:33,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:33,804 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:34,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-15 20:22:34,011 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:34,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:34,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-10-15 20:22:34,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:34,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144279025] [2020-10-15 20:22:34,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:34,125 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:34,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144279025] [2020-10-15 20:22:34,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037772796] [2020-10-15 20:22:34,125 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 [2020-10-15 20:22:34,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-15 20:22:34,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:34,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:22:34,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:34,188 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:34,199 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:34,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:34,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 20:22:34,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506114512] [2020-10-15 20:22:34,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:22:34,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:34,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:22:34,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:22:34,201 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-10-15 20:22:34,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:34,733 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-15 20:22:34,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:22:34,734 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 20:22:34,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:34,735 INFO L225 Difference]: With dead ends: 92 [2020-10-15 20:22:34,735 INFO L226 Difference]: Without dead ends: 86 [2020-10-15 20:22:34,735 INFO L677 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 [2020-10-15 20:22:34,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-15 20:22:34,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-10-15 20:22:34,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 20:22:34,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-15 20:22:34,739 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-10-15 20:22:34,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:34,739 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-15 20:22:34,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:22:34,739 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-15 20:22:34,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:22:34,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:34,740 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:34,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:34,948 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:34,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:34,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-10-15 20:22:34,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:34,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831194238] [2020-10-15 20:22:34,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:34,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:35,046 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:35,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831194238] [2020-10-15 20:22:35,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116729601] [2020-10-15 20:22:35,047 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 [2020-10-15 20:22:35,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:35,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:22:35,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:35,101 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:35,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:35,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 20:22:35,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033172903] [2020-10-15 20:22:35,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:22:35,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:35,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:22:35,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:22:35,102 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-10-15 20:22:35,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:35,555 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-10-15 20:22:35,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:22:35,555 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 20:22:35,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:35,556 INFO L225 Difference]: With dead ends: 112 [2020-10-15 20:22:35,556 INFO L226 Difference]: Without dead ends: 106 [2020-10-15 20:22:35,557 INFO L677 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 [2020-10-15 20:22:35,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-15 20:22:35,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-10-15 20:22:35,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 20:22:35,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-10-15 20:22:35,560 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-10-15 20:22:35,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:35,560 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-10-15 20:22:35,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:22:35,560 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-10-15 20:22:35,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:22:35,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:35,560 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:35,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:35,765 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:35,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:35,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-10-15 20:22:35,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:35,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699283996] [2020-10-15 20:22:35,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:35,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:35,859 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:35,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699283996] [2020-10-15 20:22:35,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597096341] [2020-10-15 20:22:35,859 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 [2020-10-15 20:22:35,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:35,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:35,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:22:35,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:35,955 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:35,971 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:35,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:35,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 20:22:35,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819676630] [2020-10-15 20:22:35,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:22:35,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:35,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:22:35,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:22:35,973 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-10-15 20:22:36,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:36,536 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-10-15 20:22:36,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:22:36,537 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 20:22:36,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:36,537 INFO L225 Difference]: With dead ends: 93 [2020-10-15 20:22:36,538 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 20:22:36,538 INFO L677 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 [2020-10-15 20:22:36,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 20:22:36,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-10-15 20:22:36,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-15 20:22:36,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-10-15 20:22:36,540 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-10-15 20:22:36,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:36,541 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-10-15 20:22:36,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:22:36,541 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-10-15 20:22:36,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:36,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:36,542 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:36,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:36,750 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:36,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:36,751 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-10-15 20:22:36,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:36,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556856837] [2020-10-15 20:22:36,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:36,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:36,902 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:36,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556856837] [2020-10-15 20:22:36,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366935707] [2020-10-15 20:22:36,903 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 [2020-10-15 20:22:36,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 20:22:36,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:36,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:22:36,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:36,957 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:36,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:36,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 20:22:36,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667958305] [2020-10-15 20:22:36,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:22:36,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:36,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:22:36,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:22:36,959 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-10-15 20:22:37,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:37,245 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-10-15 20:22:37,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:22:37,246 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 20:22:37,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:37,247 INFO L225 Difference]: With dead ends: 104 [2020-10-15 20:22:37,247 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 20:22:37,247 INFO L677 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 [2020-10-15 20:22:37,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 20:22:37,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-10-15 20:22:37,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 20:22:37,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 20:22:37,250 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 20:22:37,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:37,251 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 20:22:37,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:22:37,251 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 20:22:37,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:37,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:37,252 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:37,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:37,461 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:37,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:37,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-10-15 20:22:37,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:37,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056186963] [2020-10-15 20:22:37,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:37,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:37,609 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:37,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056186963] [2020-10-15 20:22:37,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923712480] [2020-10-15 20:22:37,610 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 [2020-10-15 20:22:37,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:37,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:37,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:22:37,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:37,673 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:37,684 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:37,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:37,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 20:22:37,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681645698] [2020-10-15 20:22:37,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:37,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:37,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:37,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:37,686 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 20:22:38,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:38,034 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-10-15 20:22:38,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:22:38,035 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 20:22:38,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:38,036 INFO L225 Difference]: With dead ends: 101 [2020-10-15 20:22:38,036 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 20:22:38,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:22:38,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 20:22:38,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-10-15 20:22:38,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 20:22:38,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 20:22:38,039 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 20:22:38,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:38,039 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 20:22:38,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:38,039 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 20:22:38,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:38,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:38,039 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:38,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:38,240 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:38,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:38,241 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-10-15 20:22:38,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:38,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374717953] [2020-10-15 20:22:38,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:38,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:38,383 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:38,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374717953] [2020-10-15 20:22:38,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387833399] [2020-10-15 20:22:38,384 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 [2020-10-15 20:22:38,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-15 20:22:38,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:38,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:22:38,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:38,445 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:38,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:38,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 20:22:38,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671853294] [2020-10-15 20:22:38,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:22:38,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:38,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:22:38,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:22:38,447 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 20:22:38,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:38,765 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-10-15 20:22:38,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:22:38,765 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 20:22:38,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:38,766 INFO L225 Difference]: With dead ends: 98 [2020-10-15 20:22:38,766 INFO L226 Difference]: Without dead ends: 92 [2020-10-15 20:22:38,767 INFO L677 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 [2020-10-15 20:22:38,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-15 20:22:38,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-10-15 20:22:38,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 20:22:38,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 20:22:38,769 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 20:22:38,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:38,769 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 20:22:38,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:22:38,769 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 20:22:38,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:38,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:38,770 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:38,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:38,972 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:38,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:38,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-10-15 20:22:38,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:38,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658758966] [2020-10-15 20:22:38,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:38,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:39,111 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:39,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658758966] [2020-10-15 20:22:39,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141453366] [2020-10-15 20:22:39,112 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 [2020-10-15 20:22:39,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-15 20:22:39,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:39,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:22:39,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:39,177 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:39,187 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:39,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:39,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 20:22:39,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057141340] [2020-10-15 20:22:39,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:39,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:39,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:39,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:39,189 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 20:22:39,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:39,603 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-10-15 20:22:39,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:22:39,603 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 20:22:39,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:39,604 INFO L225 Difference]: With dead ends: 97 [2020-10-15 20:22:39,604 INFO L226 Difference]: Without dead ends: 91 [2020-10-15 20:22:39,605 INFO L677 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 [2020-10-15 20:22:39,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-15 20:22:39,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-10-15 20:22:39,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 20:22:39,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 20:22:39,608 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 20:22:39,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:39,608 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 20:22:39,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:39,608 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 20:22:39,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:39,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:39,609 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:39,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:39,819 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:39,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:39,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-10-15 20:22:39,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:39,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400426409] [2020-10-15 20:22:39,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:39,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:39,950 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:39,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400426409] [2020-10-15 20:22:39,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563087772] [2020-10-15 20:22:39,951 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 [2020-10-15 20:22:39,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:39,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:22:39,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:40,011 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:40,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:40,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 20:22:40,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490135157] [2020-10-15 20:22:40,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:22:40,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:40,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:22:40,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:22:40,013 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 20:22:40,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:40,395 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-10-15 20:22:40,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 20:22:40,395 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 20:22:40,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:40,396 INFO L225 Difference]: With dead ends: 94 [2020-10-15 20:22:40,396 INFO L226 Difference]: Without dead ends: 88 [2020-10-15 20:22:40,397 INFO L677 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 [2020-10-15 20:22:40,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-15 20:22:40,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-10-15 20:22:40,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 20:22:40,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 20:22:40,399 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 20:22:40,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:40,399 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 20:22:40,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:22:40,399 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 20:22:40,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:40,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:40,400 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:40,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-10-15 20:22:40,600 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:40,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:40,601 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-10-15 20:22:40,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:40,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945162442] [2020-10-15 20:22:40,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:40,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:40,732 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:40,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945162442] [2020-10-15 20:22:40,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993839636] [2020-10-15 20:22:40,732 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 [2020-10-15 20:22:40,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:40,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:40,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:22:40,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:40,801 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:40,812 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:40,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:40,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 20:22:40,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794238088] [2020-10-15 20:22:40,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:40,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:40,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:40,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:40,813 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 20:22:41,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:41,325 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-10-15 20:22:41,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:22:41,325 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 20:22:41,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:41,326 INFO L225 Difference]: With dead ends: 93 [2020-10-15 20:22:41,326 INFO L226 Difference]: Without dead ends: 87 [2020-10-15 20:22:41,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:22:41,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-15 20:22:41,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-10-15 20:22:41,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 20:22:41,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 20:22:41,330 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 20:22:41,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:41,330 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 20:22:41,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:41,331 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 20:22:41,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:41,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:41,331 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:41,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:41,539 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:41,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:41,540 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-10-15 20:22:41,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:41,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510097696] [2020-10-15 20:22:41,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:41,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:41,669 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:41,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510097696] [2020-10-15 20:22:41,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809336686] [2020-10-15 20:22:41,670 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 [2020-10-15 20:22:41,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 20:22:41,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:41,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:22:41,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:41,738 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:41,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:41,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 20:22:41,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829314510] [2020-10-15 20:22:41,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:22:41,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:41,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:22:41,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:22:41,739 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 20:22:42,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:42,155 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-10-15 20:22:42,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:22:42,156 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 20:22:42,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:42,157 INFO L225 Difference]: With dead ends: 90 [2020-10-15 20:22:42,157 INFO L226 Difference]: Without dead ends: 84 [2020-10-15 20:22:42,158 INFO L677 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 [2020-10-15 20:22:42,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-15 20:22:42,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-10-15 20:22:42,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 20:22:42,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 20:22:42,160 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 20:22:42,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:42,160 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 20:22:42,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:22:42,160 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 20:22:42,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:42,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:42,161 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:42,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-10-15 20:22:42,362 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:42,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:42,362 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-10-15 20:22:42,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:42,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132059055] [2020-10-15 20:22:42,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:42,487 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:42,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132059055] [2020-10-15 20:22:42,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844309296] [2020-10-15 20:22:42,488 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 [2020-10-15 20:22:42,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:42,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:42,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:22:42,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:42,549 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:42,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:42,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 20:22:42,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209471788] [2020-10-15 20:22:42,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:42,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:42,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:42,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:42,567 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 20:22:43,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:43,127 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-15 20:22:43,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:22:43,127 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 20:22:43,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:43,128 INFO L225 Difference]: With dead ends: 89 [2020-10-15 20:22:43,128 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 20:22:43,129 INFO L677 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 [2020-10-15 20:22:43,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 20:22:43,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-10-15 20:22:43,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 20:22:43,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 20:22:43,132 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 20:22:43,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:43,132 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 20:22:43,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:43,132 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 20:22:43,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:43,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:43,133 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:43,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:43,339 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:43,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:43,339 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-10-15 20:22:43,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:43,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329997548] [2020-10-15 20:22:43,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:43,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:43,443 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:43,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329997548] [2020-10-15 20:22:43,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398804129] [2020-10-15 20:22:43,443 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 [2020-10-15 20:22:43,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-15 20:22:43,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:43,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:22:43,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:43,533 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:43,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:43,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 20:22:43,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098768883] [2020-10-15 20:22:43,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:22:43,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:43,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:22:43,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:22:43,534 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 20:22:43,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:43,978 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-10-15 20:22:43,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:22:43,979 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 20:22:43,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:43,980 INFO L225 Difference]: With dead ends: 86 [2020-10-15 20:22:43,980 INFO L226 Difference]: Without dead ends: 80 [2020-10-15 20:22:43,981 INFO L677 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 [2020-10-15 20:22:43,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-15 20:22:43,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-10-15 20:22:43,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 20:22:43,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 20:22:43,984 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 20:22:43,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:43,984 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 20:22:43,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:22:43,984 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 20:22:43,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:43,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:43,985 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:44,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:44,195 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:44,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:44,195 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-10-15 20:22:44,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:44,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044961860] [2020-10-15 20:22:44,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:44,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:44,315 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:44,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044961860] [2020-10-15 20:22:44,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276011097] [2020-10-15 20:22:44,316 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 [2020-10-15 20:22:44,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-15 20:22:44,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:44,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:22:44,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:44,381 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:44,395 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:44,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:44,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 20:22:44,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936336123] [2020-10-15 20:22:44,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:44,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:44,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:44,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:44,396 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 20:22:45,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:45,023 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-10-15 20:22:45,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:22:45,024 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 20:22:45,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:45,025 INFO L225 Difference]: With dead ends: 85 [2020-10-15 20:22:45,025 INFO L226 Difference]: Without dead ends: 79 [2020-10-15 20:22:45,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 20:22:45,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-15 20:22:45,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-10-15 20:22:45,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 20:22:45,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 20:22:45,028 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 20:22:45,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:45,028 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 20:22:45,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:45,028 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 20:22:45,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:45,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:45,029 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:45,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:45,238 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:45,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:45,238 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-10-15 20:22:45,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:45,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092465259] [2020-10-15 20:22:45,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:45,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:45,353 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:45,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092465259] [2020-10-15 20:22:45,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765921966] [2020-10-15 20:22:45,353 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 [2020-10-15 20:22:45,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:45,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:22:45,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:45,411 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:45,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:45,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 20:22:45,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960946844] [2020-10-15 20:22:45,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:22:45,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:45,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:22:45,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:22:45,413 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 20:22:45,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:45,922 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-15 20:22:45,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:22:45,922 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 20:22:45,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:45,923 INFO L225 Difference]: With dead ends: 101 [2020-10-15 20:22:45,924 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 20:22:45,924 INFO L677 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 [2020-10-15 20:22:45,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 20:22:45,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-10-15 20:22:45,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-15 20:22:45,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-10-15 20:22:45,927 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-10-15 20:22:45,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:45,927 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-10-15 20:22:45,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:22:45,927 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-10-15 20:22:45,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:45,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:45,928 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:46,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:46,139 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:46,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:46,139 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-10-15 20:22:46,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:46,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496637686] [2020-10-15 20:22:46,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:46,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:46,253 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:46,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496637686] [2020-10-15 20:22:46,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007731122] [2020-10-15 20:22:46,254 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 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 [2020-10-15 20:22:46,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:46,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:46,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:46,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:46,334 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:46,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:46,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 20:22:46,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592168212] [2020-10-15 20:22:46,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:46,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:46,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:46,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:46,336 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-10-15 20:22:46,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:46,929 INFO L93 Difference]: Finished difference Result 80 states and 197 transitions. [2020-10-15 20:22:46,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:22:46,930 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 20:22:46,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:46,931 INFO L225 Difference]: With dead ends: 80 [2020-10-15 20:22:46,931 INFO L226 Difference]: Without dead ends: 72 [2020-10-15 20:22:46,931 INFO L677 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 [2020-10-15 20:22:46,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-15 20:22:46,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-10-15 20:22:46,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-15 20:22:46,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-10-15 20:22:46,934 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-10-15 20:22:46,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:46,934 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-10-15 20:22:46,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:46,934 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-10-15 20:22:46,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:46,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:46,936 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:47,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:47,145 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:47,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:47,145 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-10-15 20:22:47,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:47,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396518551] [2020-10-15 20:22:47,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:47,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:47,250 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:47,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396518551] [2020-10-15 20:22:47,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358461071] [2020-10-15 20:22:47,251 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 [2020-10-15 20:22:47,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 20:22:47,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:47,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:22:47,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:47,312 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:22:47,326 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:47,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:47,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 20:22:47,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015621186] [2020-10-15 20:22:47,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:47,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:47,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:47,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:47,327 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-10-15 20:22:47,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:47,930 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-15 20:22:47,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:22:47,931 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 20:22:47,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:47,932 INFO L225 Difference]: With dead ends: 92 [2020-10-15 20:22:47,932 INFO L226 Difference]: Without dead ends: 87 [2020-10-15 20:22:47,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 20:22:47,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-15 20:22:47,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-10-15 20:22:47,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 20:22:47,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-15 20:22:47,935 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-10-15 20:22:47,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:47,935 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-15 20:22:47,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:47,935 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-15 20:22:47,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:47,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:47,936 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:48,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:48,137 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:48,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:48,137 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-10-15 20:22:48,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:48,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438796492] [2020-10-15 20:22:48,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:48,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:48,266 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:48,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438796492] [2020-10-15 20:22:48,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028810624] [2020-10-15 20:22:48,267 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 [2020-10-15 20:22:48,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:48,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:48,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:48,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:48,328 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:22:48,342 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:48,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:48,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 20:22:48,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687037858] [2020-10-15 20:22:48,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:48,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:48,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:48,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:48,344 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-10-15 20:22:49,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:49,011 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-10-15 20:22:49,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:22:49,011 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 20:22:49,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:49,012 INFO L225 Difference]: With dead ends: 78 [2020-10-15 20:22:49,012 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 20:22:49,013 INFO L677 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 [2020-10-15 20:22:49,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 20:22:49,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-10-15 20:22:49,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 20:22:49,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-10-15 20:22:49,015 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-10-15 20:22:49,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:49,015 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-10-15 20:22:49,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:49,015 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-10-15 20:22:49,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:49,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:49,016 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:49,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-10-15 20:22:49,218 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:49,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:49,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-10-15 20:22:49,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:49,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320340845] [2020-10-15 20:22:49,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:49,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:49,388 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:49,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320340845] [2020-10-15 20:22:49,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71377702] [2020-10-15 20:22:49,389 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 [2020-10-15 20:22:49,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 20:22:49,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:49,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:49,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:49,441 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:49,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:49,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 20:22:49,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886154598] [2020-10-15 20:22:49,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:49,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:49,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:49,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:49,443 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-10-15 20:22:49,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:49,729 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-15 20:22:49,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:22:49,729 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 20:22:49,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:49,730 INFO L225 Difference]: With dead ends: 84 [2020-10-15 20:22:49,730 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 20:22:49,731 INFO L677 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 [2020-10-15 20:22:49,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 20:22:49,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-10-15 20:22:49,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 20:22:49,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-10-15 20:22:49,733 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-10-15 20:22:49,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:49,733 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-10-15 20:22:49,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:49,733 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-10-15 20:22:49,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:49,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:49,734 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:49,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:49,935 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:49,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:49,935 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-10-15 20:22:49,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:49,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910007774] [2020-10-15 20:22:49,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:50,094 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:50,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910007774] [2020-10-15 20:22:50,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106195840] [2020-10-15 20:22:50,095 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 [2020-10-15 20:22:50,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 20:22:50,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:50,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:50,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:50,159 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:50,167 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:50,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:50,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 20:22:50,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034504863] [2020-10-15 20:22:50,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:50,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:50,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:50,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:50,169 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-10-15 20:22:50,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:50,498 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-10-15 20:22:50,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:22:50,498 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 20:22:50,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:50,499 INFO L225 Difference]: With dead ends: 98 [2020-10-15 20:22:50,499 INFO L226 Difference]: Without dead ends: 92 [2020-10-15 20:22:50,500 INFO L677 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 [2020-10-15 20:22:50,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-15 20:22:50,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-10-15 20:22:50,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-15 20:22:50,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-10-15 20:22:50,502 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-10-15 20:22:50,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:50,502 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-10-15 20:22:50,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:50,502 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-10-15 20:22:50,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:50,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:50,503 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:50,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-10-15 20:22:50,703 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:50,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:50,704 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-10-15 20:22:50,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:50,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435684466] [2020-10-15 20:22:50,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:50,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:50,870 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:50,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435684466] [2020-10-15 20:22:50,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667380436] [2020-10-15 20:22:50,871 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 [2020-10-15 20:22:50,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:50,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:50,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:50,923 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:50,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:50,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 20:22:50,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919598272] [2020-10-15 20:22:50,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:50,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:50,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:50,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:50,924 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-10-15 20:22:51,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:51,320 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-15 20:22:51,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 20:22:51,321 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 20:22:51,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:51,322 INFO L225 Difference]: With dead ends: 99 [2020-10-15 20:22:51,322 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 20:22:51,322 INFO L677 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 [2020-10-15 20:22:51,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 20:22:51,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-10-15 20:22:51,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 20:22:51,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-10-15 20:22:51,325 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-10-15 20:22:51,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:51,326 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-10-15 20:22:51,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:51,326 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-10-15 20:22:51,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:51,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:51,327 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:51,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:51,535 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:51,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:51,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-10-15 20:22:51,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:51,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023173152] [2020-10-15 20:22:51,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:51,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:51,766 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:51,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023173152] [2020-10-15 20:22:51,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628549875] [2020-10-15 20:22:51,767 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 [2020-10-15 20:22:51,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:51,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:51,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:51,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:51,869 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:51,885 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:51,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:51,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 20:22:51,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126220217] [2020-10-15 20:22:51,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:51,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:51,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:51,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:51,887 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-10-15 20:22:52,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:52,350 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-10-15 20:22:52,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:22:52,350 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 20:22:52,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:52,351 INFO L225 Difference]: With dead ends: 109 [2020-10-15 20:22:52,351 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 20:22:52,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 20:22:52,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 20:22:52,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-10-15 20:22:52,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 20:22:52,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-10-15 20:22:52,354 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-10-15 20:22:52,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:52,354 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-10-15 20:22:52,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:52,355 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-10-15 20:22:52,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:52,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:52,355 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:52,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:52,564 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:52,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:52,564 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-10-15 20:22:52,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:52,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272115043] [2020-10-15 20:22:52,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:52,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:52,722 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:52,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272115043] [2020-10-15 20:22:52,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561474076] [2020-10-15 20:22:52,723 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 [2020-10-15 20:22:52,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 20:22:52,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:52,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:52,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:52,782 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:52,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:52,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 20:22:52,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919764841] [2020-10-15 20:22:52,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:52,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:52,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:52,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:52,784 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-10-15 20:22:53,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:53,186 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-10-15 20:22:53,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:22:53,187 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 20:22:53,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:53,188 INFO L225 Difference]: With dead ends: 109 [2020-10-15 20:22:53,188 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 20:22:53,189 INFO L677 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 [2020-10-15 20:22:53,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 20:22:53,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-10-15 20:22:53,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-15 20:22:53,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-10-15 20:22:53,191 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-10-15 20:22:53,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:53,192 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-10-15 20:22:53,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:53,192 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-10-15 20:22:53,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:53,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:53,192 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:53,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-15 20:22:53,398 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:53,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:53,398 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-10-15 20:22:53,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:53,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693765141] [2020-10-15 20:22:53,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:53,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:53,555 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:53,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693765141] [2020-10-15 20:22:53,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759420934] [2020-10-15 20:22:53,555 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 [2020-10-15 20:22:53,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:53,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:53,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:53,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:53,614 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:53,625 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:53,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:53,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 20:22:53,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874995823] [2020-10-15 20:22:53,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:53,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:53,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:53,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:53,626 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-10-15 20:22:54,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:54,100 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-10-15 20:22:54,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:22:54,101 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 20:22:54,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:54,102 INFO L225 Difference]: With dead ends: 106 [2020-10-15 20:22:54,102 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 20:22:54,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:22:54,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 20:22:54,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-15 20:22:54,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 20:22:54,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-10-15 20:22:54,104 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-10-15 20:22:54,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:54,105 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-10-15 20:22:54,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:54,105 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-10-15 20:22:54,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:54,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:54,105 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:54,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-15 20:22:54,308 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:54,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:54,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-10-15 20:22:54,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:54,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937612591] [2020-10-15 20:22:54,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:54,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:54,452 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:54,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937612591] [2020-10-15 20:22:54,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902927073] [2020-10-15 20:22:54,453 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 [2020-10-15 20:22:54,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 20:22:54,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:54,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:54,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:54,520 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:54,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:54,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 20:22:54,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951006598] [2020-10-15 20:22:54,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:54,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:54,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:54,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:54,522 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-10-15 20:22:54,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:54,973 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-10-15 20:22:54,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:22:54,974 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 20:22:54,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:54,975 INFO L225 Difference]: With dead ends: 107 [2020-10-15 20:22:54,975 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 20:22:54,975 INFO L677 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 [2020-10-15 20:22:54,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 20:22:54,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-15 20:22:54,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-15 20:22:54,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-10-15 20:22:54,977 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-10-15 20:22:54,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:54,978 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-10-15 20:22:54,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:54,978 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-10-15 20:22:54,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:54,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:54,978 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:55,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:55,187 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:55,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:55,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-10-15 20:22:55,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:55,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808262934] [2020-10-15 20:22:55,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:55,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:55,340 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:55,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808262934] [2020-10-15 20:22:55,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748804812] [2020-10-15 20:22:55,340 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 [2020-10-15 20:22:55,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 20:22:55,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:55,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:55,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:55,405 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:55,416 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:55,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:55,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 20:22:55,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379154047] [2020-10-15 20:22:55,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:55,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:55,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:55,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:55,417 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-10-15 20:22:55,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:55,959 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-10-15 20:22:55,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:22:55,959 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 20:22:55,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:55,960 INFO L225 Difference]: With dead ends: 104 [2020-10-15 20:22:55,960 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 20:22:55,960 INFO L677 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 [2020-10-15 20:22:55,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 20:22:55,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-10-15 20:22:55,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 20:22:55,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-10-15 20:22:55,963 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-10-15 20:22:55,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:55,963 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-10-15 20:22:55,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:55,964 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-10-15 20:22:55,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:55,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:55,964 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:56,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-15 20:22:56,168 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:56,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:56,168 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-10-15 20:22:56,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:56,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126012079] [2020-10-15 20:22:56,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:56,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:56,306 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:56,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126012079] [2020-10-15 20:22:56,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669304511] [2020-10-15 20:22:56,307 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 [2020-10-15 20:22:56,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:56,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:56,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:56,363 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:56,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:56,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 20:22:56,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515155436] [2020-10-15 20:22:56,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:56,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:56,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:56,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:56,364 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-10-15 20:22:56,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:56,858 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-10-15 20:22:56,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:22:56,859 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 20:22:56,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:56,859 INFO L225 Difference]: With dead ends: 105 [2020-10-15 20:22:56,860 INFO L226 Difference]: Without dead ends: 99 [2020-10-15 20:22:56,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 20:22:56,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-15 20:22:56,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-10-15 20:22:56,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 20:22:56,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 20:22:56,863 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-10-15 20:22:56,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:56,863 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 20:22:56,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:56,863 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 20:22:56,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:56,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:56,864 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:57,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:57,073 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:57,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:57,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-10-15 20:22:57,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:57,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372528518] [2020-10-15 20:22:57,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:57,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:57,212 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:57,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372528518] [2020-10-15 20:22:57,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497885479] [2020-10-15 20:22:57,213 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 [2020-10-15 20:22:57,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:57,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:57,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:57,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:57,272 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:57,284 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:57,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:57,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 20:22:57,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080261057] [2020-10-15 20:22:57,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:57,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:57,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:57,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:57,285 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-10-15 20:22:57,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:57,901 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-10-15 20:22:57,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:22:57,902 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 20:22:57,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:57,903 INFO L225 Difference]: With dead ends: 102 [2020-10-15 20:22:57,903 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 20:22:57,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 20:22:57,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 20:22:57,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-10-15 20:22:57,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 20:22:57,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 20:22:57,905 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-10-15 20:22:57,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:57,905 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 20:22:57,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:57,905 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 20:22:57,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:57,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:57,906 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:58,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-10-15 20:22:58,106 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:58,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:58,107 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-10-15 20:22:58,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:58,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441348650] [2020-10-15 20:22:58,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:58,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:58,249 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:58,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441348650] [2020-10-15 20:22:58,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192038138] [2020-10-15 20:22:58,250 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 [2020-10-15 20:22:58,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 20:22:58,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:58,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:58,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:58,312 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:58,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:58,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 20:22:58,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109116759] [2020-10-15 20:22:58,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:58,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:58,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:58,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:58,313 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-10-15 20:22:58,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:58,847 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-10-15 20:22:58,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:22:58,847 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 20:22:58,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:58,848 INFO L225 Difference]: With dead ends: 103 [2020-10-15 20:22:58,848 INFO L226 Difference]: Without dead ends: 97 [2020-10-15 20:22:58,849 INFO L677 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 [2020-10-15 20:22:58,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-15 20:22:58,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-10-15 20:22:58,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 20:22:58,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-10-15 20:22:58,850 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-10-15 20:22:58,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:58,851 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-10-15 20:22:58,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:58,851 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-10-15 20:22:58,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:58,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:58,851 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:59,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:59,052 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:59,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:59,053 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-10-15 20:22:59,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:59,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775333775] [2020-10-15 20:22:59,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:59,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:59,182 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:59,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775333775] [2020-10-15 20:22:59,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554152239] [2020-10-15 20:22:59,183 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 [2020-10-15 20:22:59,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:59,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:59,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:59,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:59,244 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:59,256 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:59,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:59,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 20:22:59,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063341489] [2020-10-15 20:22:59,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:59,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:59,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:59,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:59,258 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-10-15 20:22:59,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:59,934 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-10-15 20:22:59,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:22:59,935 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 20:22:59,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:59,936 INFO L225 Difference]: With dead ends: 100 [2020-10-15 20:22:59,936 INFO L226 Difference]: Without dead ends: 94 [2020-10-15 20:22:59,936 INFO L677 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 [2020-10-15 20:22:59,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-15 20:22:59,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-10-15 20:22:59,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 20:22:59,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-15 20:22:59,938 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-10-15 20:22:59,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:59,939 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-15 20:22:59,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:59,939 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-15 20:22:59,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:59,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:59,939 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:00,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-15 20:23:00,142 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:00,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:00,142 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-10-15 20:23:00,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:00,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121675479] [2020-10-15 20:23:00,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:00,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:00,258 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:00,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121675479] [2020-10-15 20:23:00,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241237558] [2020-10-15 20:23:00,259 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 [2020-10-15 20:23:00,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 20:23:00,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:00,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:23:00,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:00,371 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:00,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:00,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 20:23:00,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953489398] [2020-10-15 20:23:00,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:23:00,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:00,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:23:00,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:23:00,374 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-10-15 20:23:01,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:01,152 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-15 20:23:01,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:23:01,153 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 20:23:01,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:01,154 INFO L225 Difference]: With dead ends: 120 [2020-10-15 20:23:01,154 INFO L226 Difference]: Without dead ends: 114 [2020-10-15 20:23:01,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 20:23:01,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-15 20:23:01,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-10-15 20:23:01,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 20:23:01,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-10-15 20:23:01,159 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-10-15 20:23:01,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:01,159 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-10-15 20:23:01,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:23:01,160 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-10-15 20:23:01,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:23:01,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:01,163 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:01,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-15 20:23:01,375 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:01,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:01,376 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-10-15 20:23:01,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:01,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041663750] [2020-10-15 20:23:01,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:01,551 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:01,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041663750] [2020-10-15 20:23:01,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395273900] [2020-10-15 20:23:01,552 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 [2020-10-15 20:23:01,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 20:23:01,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:01,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:23:01,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:01,653 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:01,671 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:01,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:01,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 20:23:01,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396712559] [2020-10-15 20:23:01,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:23:01,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:01,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:23:01,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:23:01,673 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-10-15 20:23:02,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:02,465 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-10-15 20:23:02,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:23:02,466 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 20:23:02,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:02,466 INFO L225 Difference]: With dead ends: 101 [2020-10-15 20:23:02,466 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 20:23:02,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 20:23:02,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 20:23:02,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-10-15 20:23:02,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-15 20:23:02,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-10-15 20:23:02,469 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-10-15 20:23:02,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:02,469 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-10-15 20:23:02,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:23:02,469 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-10-15 20:23:02,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:23:02,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:02,470 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:02,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:02,675 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:02,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:02,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-10-15 20:23:02,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:02,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802319023] [2020-10-15 20:23:02,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:02,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:02,867 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:02,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802319023] [2020-10-15 20:23:02,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818110833] [2020-10-15 20:23:02,868 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 [2020-10-15 20:23:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:02,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:23:02,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:02,921 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:02,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:02,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 20:23:02,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708346988] [2020-10-15 20:23:02,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:23:02,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:02,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:23:02,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:23:02,922 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-10-15 20:23:03,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:03,265 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-10-15 20:23:03,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:23:03,265 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 20:23:03,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:03,266 INFO L225 Difference]: With dead ends: 114 [2020-10-15 20:23:03,266 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 20:23:03,267 INFO L677 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 [2020-10-15 20:23:03,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 20:23:03,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-10-15 20:23:03,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 20:23:03,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 20:23:03,268 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 20:23:03,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:03,269 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 20:23:03,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:23:03,269 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 20:23:03,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:23:03,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:03,269 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:03,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:03,470 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:03,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:03,471 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-10-15 20:23:03,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:03,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258069485] [2020-10-15 20:23:03,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:03,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:03,669 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:03,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258069485] [2020-10-15 20:23:03,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495373298] [2020-10-15 20:23:03,670 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 [2020-10-15 20:23:03,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:23:03,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:03,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:23:03,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:03,729 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:03,739 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:03,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:03,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 20:23:03,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384423066] [2020-10-15 20:23:03,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:23:03,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:03,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:23:03,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:23:03,741 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 20:23:04,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:04,156 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-10-15 20:23:04,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:23:04,156 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 20:23:04,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:04,157 INFO L225 Difference]: With dead ends: 111 [2020-10-15 20:23:04,157 INFO L226 Difference]: Without dead ends: 105 [2020-10-15 20:23:04,157 INFO L677 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 [2020-10-15 20:23:04,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-15 20:23:04,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-10-15 20:23:04,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:23:04,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 20:23:04,159 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 20:23:04,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:04,159 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 20:23:04,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:23:04,160 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 20:23:04,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:23:04,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:04,160 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:04,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-15 20:23:04,363 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:04,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:04,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-10-15 20:23:04,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:04,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967979481] [2020-10-15 20:23:04,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:04,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:04,543 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:04,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967979481] [2020-10-15 20:23:04,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190994871] [2020-10-15 20:23:04,544 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 [2020-10-15 20:23:04,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 20:23:04,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:04,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:23:04,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:04,618 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:04,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:04,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 20:23:04,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246558318] [2020-10-15 20:23:04,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:23:04,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:04,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:23:04,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:23:04,619 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 20:23:04,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:05,000 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-15 20:23:05,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 20:23:05,000 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 20:23:05,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:05,001 INFO L225 Difference]: With dead ends: 108 [2020-10-15 20:23:05,001 INFO L226 Difference]: Without dead ends: 102 [2020-10-15 20:23:05,001 INFO L677 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 [2020-10-15 20:23:05,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-15 20:23:05,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-10-15 20:23:05,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 20:23:05,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 20:23:05,004 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 20:23:05,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:05,004 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 20:23:05,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:23:05,004 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 20:23:05,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:23:05,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:05,005 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:05,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:05,210 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:05,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:05,210 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-10-15 20:23:05,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:05,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465850987] [2020-10-15 20:23:05,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:05,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:05,392 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:05,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465850987] [2020-10-15 20:23:05,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10538463] [2020-10-15 20:23:05,393 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 [2020-10-15 20:23:05,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:23:05,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:05,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:23:05,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:05,455 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:05,466 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:05,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:05,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 20:23:05,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866631760] [2020-10-15 20:23:05,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:23:05,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:05,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:23:05,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:23:05,468 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 20:23:05,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:05,963 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-10-15 20:23:05,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:23:05,964 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 20:23:05,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:05,964 INFO L225 Difference]: With dead ends: 107 [2020-10-15 20:23:05,965 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 20:23:05,965 INFO L677 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 [2020-10-15 20:23:05,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 20:23:05,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-10-15 20:23:05,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:23:05,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 20:23:05,967 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 20:23:05,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:05,967 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 20:23:05,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:23:05,968 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 20:23:05,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:23:05,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:05,968 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:06,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-10-15 20:23:06,169 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:06,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:06,169 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-10-15 20:23:06,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:06,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748167198] [2020-10-15 20:23:06,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:06,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:06,341 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:06,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748167198] [2020-10-15 20:23:06,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126316839] [2020-10-15 20:23:06,342 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 [2020-10-15 20:23:06,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 20:23:06,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:06,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:23:06,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:06,399 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:06,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:06,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 20:23:06,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999336604] [2020-10-15 20:23:06,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:23:06,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:06,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:23:06,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:23:06,401 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 20:23:06,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:06,848 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-15 20:23:06,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:23:06,849 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 20:23:06,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:06,850 INFO L225 Difference]: With dead ends: 104 [2020-10-15 20:23:06,850 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 20:23:06,850 INFO L677 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 [2020-10-15 20:23:06,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 20:23:06,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-10-15 20:23:06,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 20:23:06,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 20:23:06,853 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 20:23:06,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:06,853 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 20:23:06,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:23:06,853 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 20:23:06,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:23:06,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:06,854 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:07,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-15 20:23:07,057 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:07,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:07,057 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-10-15 20:23:07,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:07,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296176386] [2020-10-15 20:23:07,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:07,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:07,225 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:07,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296176386] [2020-10-15 20:23:07,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318657905] [2020-10-15 20:23:07,226 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 [2020-10-15 20:23:07,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 20:23:07,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:07,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:23:07,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:07,293 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:07,304 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:07,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:07,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 20:23:07,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172999789] [2020-10-15 20:23:07,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:23:07,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:07,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:23:07,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:23:07,305 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 20:23:07,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:07,871 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-10-15 20:23:07,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:23:07,871 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 20:23:07,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:07,872 INFO L225 Difference]: With dead ends: 103 [2020-10-15 20:23:07,872 INFO L226 Difference]: Without dead ends: 97 [2020-10-15 20:23:07,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 20:23:07,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-15 20:23:07,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-10-15 20:23:07,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:23:07,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 20:23:07,875 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 20:23:07,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:07,875 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 20:23:07,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:23:07,876 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 20:23:07,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:23:07,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:07,876 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:08,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-10-15 20:23:08,082 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:08,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:08,082 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-10-15 20:23:08,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:08,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225478446] [2020-10-15 20:23:08,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:08,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:08,246 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:08,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225478446] [2020-10-15 20:23:08,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478318705] [2020-10-15 20:23:08,247 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 [2020-10-15 20:23:08,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:08,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:23:08,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:08,304 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:08,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:08,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 20:23:08,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817693814] [2020-10-15 20:23:08,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:23:08,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:08,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:23:08,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:23:08,306 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 20:23:08,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:08,810 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-10-15 20:23:08,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:23:08,810 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 20:23:08,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:08,811 INFO L225 Difference]: With dead ends: 100 [2020-10-15 20:23:08,811 INFO L226 Difference]: Without dead ends: 94 [2020-10-15 20:23:08,811 INFO L677 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 [2020-10-15 20:23:08,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-15 20:23:08,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-10-15 20:23:08,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 20:23:08,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 20:23:08,813 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 20:23:08,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:08,813 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 20:23:08,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:23:08,814 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 20:23:08,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:23:08,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:08,814 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:09,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:09,015 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:09,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:09,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-10-15 20:23:09,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:09,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649786503] [2020-10-15 20:23:09,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:09,179 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:09,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649786503] [2020-10-15 20:23:09,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75510527] [2020-10-15 20:23:09,180 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 [2020-10-15 20:23:09,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:23:09,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:09,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:23:09,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:09,245 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:09,256 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:09,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:09,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 20:23:09,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063706735] [2020-10-15 20:23:09,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:23:09,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:09,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:23:09,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:23:09,258 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 20:23:09,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:09,902 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-15 20:23:09,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:23:09,909 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 20:23:09,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:09,910 INFO L225 Difference]: With dead ends: 99 [2020-10-15 20:23:09,910 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 20:23:09,910 INFO L677 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 [2020-10-15 20:23:09,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 20:23:09,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-10-15 20:23:09,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:23:09,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 20:23:09,912 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 20:23:09,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:09,913 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 20:23:09,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:23:09,913 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 20:23:09,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:23:09,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:09,913 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:10,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-10-15 20:23:10,114 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:10,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:10,115 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-10-15 20:23:10,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:10,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296713996] [2020-10-15 20:23:10,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:10,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:10,263 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:10,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296713996] [2020-10-15 20:23:10,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585239179] [2020-10-15 20:23:10,264 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 [2020-10-15 20:23:10,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 20:23:10,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:10,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:23:10,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:10,326 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:10,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:10,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 20:23:10,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208097378] [2020-10-15 20:23:10,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:23:10,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:10,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:23:10,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:23:10,327 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 20:23:10,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:10,901 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-15 20:23:10,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:23:10,901 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 20:23:10,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:10,902 INFO L225 Difference]: With dead ends: 96 [2020-10-15 20:23:10,902 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 20:23:10,902 INFO L677 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 [2020-10-15 20:23:10,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 20:23:10,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-10-15 20:23:10,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 20:23:10,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 20:23:10,904 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 20:23:10,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:10,905 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 20:23:10,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:23:10,905 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 20:23:10,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:23:10,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:10,905 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:11,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:11,108 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:11,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:11,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-10-15 20:23:11,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:11,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205455825] [2020-10-15 20:23:11,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:11,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:11,273 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:11,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205455825] [2020-10-15 20:23:11,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008023491] [2020-10-15 20:23:11,273 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 [2020-10-15 20:23:11,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:23:11,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:11,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:23:11,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:11,337 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:11,350 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:11,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:11,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 20:23:11,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004896870] [2020-10-15 20:23:11,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:23:11,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:11,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:23:11,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:23:11,352 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 20:23:12,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:12,077 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-15 20:23:12,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:23:12,077 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 20:23:12,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:12,078 INFO L225 Difference]: With dead ends: 95 [2020-10-15 20:23:12,078 INFO L226 Difference]: Without dead ends: 89 [2020-10-15 20:23:12,078 INFO L677 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 [2020-10-15 20:23:12,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-15 20:23:12,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-10-15 20:23:12,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:23:12,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 20:23:12,081 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 20:23:12,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:12,081 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 20:23:12,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:23:12,081 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 20:23:12,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:23:12,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:12,081 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:12,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:12,282 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:12,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:12,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-10-15 20:23:12,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:12,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188824479] [2020-10-15 20:23:12,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:12,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:12,456 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:12,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188824479] [2020-10-15 20:23:12,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698186651] [2020-10-15 20:23:12,457 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 [2020-10-15 20:23:12,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 20:23:12,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:12,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:23:12,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:12,554 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:12,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:12,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 20:23:12,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775962794] [2020-10-15 20:23:12,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:23:12,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:12,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:23:12,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:23:12,556 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 20:23:13,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:13,195 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-15 20:23:13,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:23:13,195 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 20:23:13,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:13,196 INFO L225 Difference]: With dead ends: 92 [2020-10-15 20:23:13,196 INFO L226 Difference]: Without dead ends: 86 [2020-10-15 20:23:13,196 INFO L677 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 [2020-10-15 20:23:13,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-15 20:23:13,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-10-15 20:23:13,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 20:23:13,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 20:23:13,198 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 20:23:13,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:13,199 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 20:23:13,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:23:13,199 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 20:23:13,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:23:13,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:13,199 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:13,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:13,407 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:13,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:13,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-10-15 20:23:13,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:13,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570144786] [2020-10-15 20:23:13,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:13,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:13,546 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:13,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570144786] [2020-10-15 20:23:13,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107821454] [2020-10-15 20:23:13,547 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 [2020-10-15 20:23:13,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 20:23:13,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:13,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:23:13,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:13,636 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:13,647 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:13,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:13,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 20:23:13,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693715680] [2020-10-15 20:23:13,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:23:13,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:13,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:23:13,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:23:13,648 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 20:23:14,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:14,468 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-10-15 20:23:14,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:23:14,469 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 20:23:14,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:14,469 INFO L225 Difference]: With dead ends: 91 [2020-10-15 20:23:14,469 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 20:23:14,470 INFO L677 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 [2020-10-15 20:23:14,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 20:23:14,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-10-15 20:23:14,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:23:14,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 20:23:14,472 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 20:23:14,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:14,472 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 20:23:14,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:23:14,472 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 20:23:14,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:23:14,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:14,473 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:14,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:14,673 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:14,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:14,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-10-15 20:23:14,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:14,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56066367] [2020-10-15 20:23:14,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:14,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:14,837 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:14,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56066367] [2020-10-15 20:23:14,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974421408] [2020-10-15 20:23:14,837 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 [2020-10-15 20:23:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:14,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:23:14,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:14,941 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:14,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:14,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 20:23:14,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407074281] [2020-10-15 20:23:14,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:23:14,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:14,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:23:14,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:23:14,943 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 20:23:15,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:15,626 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-15 20:23:15,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:23:15,626 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 20:23:15,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:15,627 INFO L225 Difference]: With dead ends: 107 [2020-10-15 20:23:15,627 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 20:23:15,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 20:23:15,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 20:23:15,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-10-15 20:23:15,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 20:23:15,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-10-15 20:23:15,630 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-10-15 20:23:15,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:15,630 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-10-15 20:23:15,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:23:15,630 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-10-15 20:23:15,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:23:15,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:15,630 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:15,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-15 20:23:15,831 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:15,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:15,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-10-15 20:23:15,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:15,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498933145] [2020-10-15 20:23:15,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:15,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:15,977 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:15,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498933145] [2020-10-15 20:23:15,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285314709] [2020-10-15 20:23:15,977 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 [2020-10-15 20:23:16,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:23:16,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:16,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:23:16,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:16,050 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:16,062 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:16,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:16,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 20:23:16,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942915316] [2020-10-15 20:23:16,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:23:16,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:16,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:23:16,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:23:16,063 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-10-15 20:23:16,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:16,907 INFO L93 Difference]: Finished difference Result 88 states and 217 transitions. [2020-10-15 20:23:16,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:23:16,908 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 20:23:16,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:16,909 INFO L225 Difference]: With dead ends: 88 [2020-10-15 20:23:16,909 INFO L226 Difference]: Without dead ends: 80 [2020-10-15 20:23:16,909 INFO L677 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 [2020-10-15 20:23:16,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-15 20:23:16,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-10-15 20:23:16,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 20:23:16,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-10-15 20:23:16,911 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-10-15 20:23:16,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:16,911 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-10-15 20:23:16,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:23:16,912 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-10-15 20:23:16,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:23:16,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:16,912 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:17,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-10-15 20:23:17,113 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:17,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:17,113 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-10-15 20:23:17,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:17,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669526014] [2020-10-15 20:23:17,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:17,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:17,267 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:17,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669526014] [2020-10-15 20:23:17,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408661849] [2020-10-15 20:23:17,267 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 [2020-10-15 20:23:17,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 20:23:17,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:17,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:23:17,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:17,334 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:23:17,351 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:17,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:17,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 20:23:17,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169137116] [2020-10-15 20:23:17,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:23:17,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:17,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:23:17,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:23:17,353 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-10-15 20:23:18,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:18,128 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-10-15 20:23:18,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:23:18,129 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 20:23:18,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:18,129 INFO L225 Difference]: With dead ends: 100 [2020-10-15 20:23:18,130 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 20:23:18,130 INFO L677 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 [2020-10-15 20:23:18,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 20:23:18,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-10-15 20:23:18,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 20:23:18,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-15 20:23:18,131 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-10-15 20:23:18,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:18,131 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-15 20:23:18,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:23:18,132 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-15 20:23:18,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:23:18,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:18,132 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:18,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-15 20:23:18,333 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:18,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:18,333 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-10-15 20:23:18,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:18,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400170178] [2020-10-15 20:23:18,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:18,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:18,499 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:18,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400170178] [2020-10-15 20:23:18,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266362036] [2020-10-15 20:23:18,500 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 [2020-10-15 20:23:18,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:23:18,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:18,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:23:18,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:18,563 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:23:18,580 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:18,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:18,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 20:23:18,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028378718] [2020-10-15 20:23:18,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:18,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:18,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:18,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:18,582 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-10-15 20:23:19,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:19,430 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-10-15 20:23:19,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:23:19,431 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 20:23:19,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:19,432 INFO L225 Difference]: With dead ends: 84 [2020-10-15 20:23:19,432 INFO L226 Difference]: Without dead ends: 79 [2020-10-15 20:23:19,432 INFO L677 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 [2020-10-15 20:23:19,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-15 20:23:19,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-10-15 20:23:19,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 20:23:19,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-10-15 20:23:19,434 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-10-15 20:23:19,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:19,434 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-10-15 20:23:19,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:19,434 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-10-15 20:23:19,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:23:19,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:19,435 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:19,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-15 20:23:19,635 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:19,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:19,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-10-15 20:23:19,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:19,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699569437] [2020-10-15 20:23:19,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:19,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:19,856 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:19,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699569437] [2020-10-15 20:23:19,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362330980] [2020-10-15 20:23:19,857 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 [2020-10-15 20:23:19,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 20:23:19,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:19,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:23:19,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:19,915 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:19,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:19,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 20:23:19,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777614234] [2020-10-15 20:23:19,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:23:19,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:19,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:23:19,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:23:19,916 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-10-15 20:23:20,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:20,262 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-10-15 20:23:20,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:23:20,263 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 20:23:20,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:20,264 INFO L225 Difference]: With dead ends: 90 [2020-10-15 20:23:20,264 INFO L226 Difference]: Without dead ends: 84 [2020-10-15 20:23:20,264 INFO L677 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 [2020-10-15 20:23:20,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-15 20:23:20,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-10-15 20:23:20,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 20:23:20,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-10-15 20:23:20,266 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-10-15 20:23:20,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:20,266 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-10-15 20:23:20,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:23:20,267 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-10-15 20:23:20,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:23:20,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:20,267 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:20,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:20,474 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:20,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:20,475 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-10-15 20:23:20,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:20,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527703908] [2020-10-15 20:23:20,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:20,695 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:20,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527703908] [2020-10-15 20:23:20,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449018281] [2020-10-15 20:23:20,696 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 [2020-10-15 20:23:20,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 20:23:20,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:20,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:23:20,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:20,766 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:20,776 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:20,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:20,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 20:23:20,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690468857] [2020-10-15 20:23:20,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:20,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:20,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:20,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:20,777 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-10-15 20:23:21,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:21,181 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-10-15 20:23:21,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:23:21,182 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 20:23:21,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:21,182 INFO L225 Difference]: With dead ends: 106 [2020-10-15 20:23:21,183 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 20:23:21,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:23:21,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 20:23:21,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-15 20:23:21,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 20:23:21,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-10-15 20:23:21,186 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-10-15 20:23:21,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:21,186 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-10-15 20:23:21,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:21,186 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-10-15 20:23:21,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:23:21,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:21,187 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:21,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-10-15 20:23:21,390 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:21,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:21,391 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-10-15 20:23:21,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:21,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867301404] [2020-10-15 20:23:21,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:21,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:21,593 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:21,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867301404] [2020-10-15 20:23:21,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036166084] [2020-10-15 20:23:21,593 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 [2020-10-15 20:23:21,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:21,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:23:21,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:21,647 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:21,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:21,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 20:23:21,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923110696] [2020-10-15 20:23:21,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:23:21,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:21,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:23:21,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:23:21,648 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-10-15 20:23:22,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:22,093 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-10-15 20:23:22,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:23:22,093 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 20:23:22,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:22,094 INFO L225 Difference]: With dead ends: 107 [2020-10-15 20:23:22,094 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 20:23:22,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:23:22,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 20:23:22,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-15 20:23:22,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-15 20:23:22,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-10-15 20:23:22,096 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-10-15 20:23:22,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:22,097 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-10-15 20:23:22,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:23:22,097 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-10-15 20:23:22,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:23:22,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:22,097 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:22,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-15 20:23:22,304 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:22,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:22,304 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-10-15 20:23:22,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:22,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957921130] [2020-10-15 20:23:22,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:22,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:22,516 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:22,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957921130] [2020-10-15 20:23:22,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097066546] [2020-10-15 20:23:22,517 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 [2020-10-15 20:23:22,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:23:22,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:22,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:23:22,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:22,579 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:22,592 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:22,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:22,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 20:23:22,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153814610] [2020-10-15 20:23:22,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:22,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:22,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:22,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:22,593 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-10-15 20:23:23,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:23,079 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-10-15 20:23:23,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:23:23,079 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 20:23:23,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:23,080 INFO L225 Difference]: With dead ends: 119 [2020-10-15 20:23:23,080 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 20:23:23,080 INFO L677 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 [2020-10-15 20:23:23,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 20:23:23,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-10-15 20:23:23,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 20:23:23,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-10-15 20:23:23,083 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-10-15 20:23:23,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:23,083 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-10-15 20:23:23,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:23,083 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-10-15 20:23:23,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:23:23,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:23,084 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:23,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-10-15 20:23:23,285 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:23,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:23,285 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-10-15 20:23:23,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:23,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959785687] [2020-10-15 20:23:23,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:23,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:23,481 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:23,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959785687] [2020-10-15 20:23:23,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021395897] [2020-10-15 20:23:23,482 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 [2020-10-15 20:23:23,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 20:23:23,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:23,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:23:23,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:23,545 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:23,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:23,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 20:23:23,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462743506] [2020-10-15 20:23:23,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:23:23,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:23,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:23:23,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:23:23,547 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-10-15 20:23:24,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:24,040 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-10-15 20:23:24,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:23:24,040 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 20:23:24,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:24,041 INFO L225 Difference]: With dead ends: 119 [2020-10-15 20:23:24,041 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 20:23:24,041 INFO L677 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 [2020-10-15 20:23:24,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 20:23:24,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-10-15 20:23:24,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 20:23:24,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-10-15 20:23:24,043 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-10-15 20:23:24,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:24,043 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-10-15 20:23:24,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:23:24,043 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-10-15 20:23:24,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:23:24,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:24,044 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:24,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:24,253 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:24,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:24,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-10-15 20:23:24,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:24,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722877112] [2020-10-15 20:23:24,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:24,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:24,452 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:24,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722877112] [2020-10-15 20:23:24,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071519729] [2020-10-15 20:23:24,452 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 [2020-10-15 20:23:24,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:23:24,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:24,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:23:24,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:24,518 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:24,528 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:24,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:24,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 20:23:24,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936438756] [2020-10-15 20:23:24,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:24,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:24,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:24,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:24,529 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-10-15 20:23:25,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:25,089 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-10-15 20:23:25,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:23:25,090 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 20:23:25,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:25,090 INFO L225 Difference]: With dead ends: 116 [2020-10-15 20:23:25,090 INFO L226 Difference]: Without dead ends: 110 [2020-10-15 20:23:25,091 INFO L677 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 [2020-10-15 20:23:25,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-15 20:23:25,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-10-15 20:23:25,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 20:23:25,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-10-15 20:23:25,092 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-10-15 20:23:25,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:25,092 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-10-15 20:23:25,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:25,092 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-10-15 20:23:25,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:23:25,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:25,093 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:25,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:25,294 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:25,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:25,294 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-10-15 20:23:25,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:25,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707008618] [2020-10-15 20:23:25,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:25,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:25,489 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:25,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707008618] [2020-10-15 20:23:25,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635903400] [2020-10-15 20:23:25,489 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 [2020-10-15 20:23:25,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 20:23:25,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:25,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:23:25,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:25,618 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:25,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:25,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 20:23:25,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738700713] [2020-10-15 20:23:25,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:23:25,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:25,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:23:25,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:23:25,621 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-10-15 20:23:26,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:26,157 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-10-15 20:23:26,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:23:26,158 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 20:23:26,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:26,158 INFO L225 Difference]: With dead ends: 117 [2020-10-15 20:23:26,158 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 20:23:26,159 INFO L677 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 [2020-10-15 20:23:26,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 20:23:26,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-10-15 20:23:26,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 20:23:26,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-10-15 20:23:26,161 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-10-15 20:23:26,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:26,161 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-10-15 20:23:26,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:23:26,161 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-10-15 20:23:26,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:23:26,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:26,162 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:26,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:26,362 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:26,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:26,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-10-15 20:23:26,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:26,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712716911] [2020-10-15 20:23:26,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:26,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:26,552 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:26,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712716911] [2020-10-15 20:23:26,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844697498] [2020-10-15 20:23:26,552 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 [2020-10-15 20:23:26,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 20:23:26,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:26,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:23:26,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:26,630 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:26,642 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:26,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:26,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 20:23:26,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912317420] [2020-10-15 20:23:26,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:26,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:26,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:26,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:26,644 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-10-15 20:23:27,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:27,282 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-10-15 20:23:27,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:23:27,283 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 20:23:27,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:27,283 INFO L225 Difference]: With dead ends: 114 [2020-10-15 20:23:27,283 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 20:23:27,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 20:23:27,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 20:23:27,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-10-15 20:23:27,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 20:23:27,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-10-15 20:23:27,286 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-10-15 20:23:27,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:27,286 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-10-15 20:23:27,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:27,286 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-10-15 20:23:27,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:23:27,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:27,287 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:27,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-15 20:23:27,495 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:27,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:27,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-10-15 20:23:27,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:27,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33971784] [2020-10-15 20:23:27,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:27,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:27,675 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:27,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33971784] [2020-10-15 20:23:27,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471701411] [2020-10-15 20:23:27,676 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 [2020-10-15 20:23:27,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:27,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:23:27,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:27,734 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:27,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:27,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 20:23:27,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386413327] [2020-10-15 20:23:27,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:23:27,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:27,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:23:27,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:23:27,736 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-10-15 20:23:28,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:28,320 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-10-15 20:23:28,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:23:28,321 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 20:23:28,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:28,321 INFO L225 Difference]: With dead ends: 115 [2020-10-15 20:23:28,321 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 20:23:28,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 20:23:28,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 20:23:28,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-10-15 20:23:28,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-15 20:23:28,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-10-15 20:23:28,324 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-10-15 20:23:28,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:28,325 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-10-15 20:23:28,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:23:28,325 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-10-15 20:23:28,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:23:28,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:28,325 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:28,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:28,534 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:28,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:28,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-10-15 20:23:28,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:28,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401022692] [2020-10-15 20:23:28,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:28,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:28,720 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:28,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401022692] [2020-10-15 20:23:28,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385573537] [2020-10-15 20:23:28,721 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 [2020-10-15 20:23:28,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:23:28,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:28,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:23:28,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:28,784 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:28,796 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:28,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:28,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 20:23:28,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631385518] [2020-10-15 20:23:28,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:28,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:28,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:28,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:28,797 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-10-15 20:23:29,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:29,517 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-10-15 20:23:29,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:23:29,517 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 20:23:29,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:29,517 INFO L225 Difference]: With dead ends: 112 [2020-10-15 20:23:29,518 INFO L226 Difference]: Without dead ends: 106 [2020-10-15 20:23:29,518 INFO L677 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 [2020-10-15 20:23:29,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-15 20:23:29,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-10-15 20:23:29,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-15 20:23:29,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-10-15 20:23:29,520 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-10-15 20:23:29,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:29,520 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-10-15 20:23:29,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:29,520 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-10-15 20:23:29,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:23:29,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:29,521 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:29,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-15 20:23:29,729 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:29,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:29,729 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-10-15 20:23:29,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:29,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903738572] [2020-10-15 20:23:29,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:29,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:29,903 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:29,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903738572] [2020-10-15 20:23:29,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983370989] [2020-10-15 20:23:29,903 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 [2020-10-15 20:23:29,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 20:23:29,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:29,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:23:29,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:29,965 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:29,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:29,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 20:23:29,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197815420] [2020-10-15 20:23:29,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:23:29,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:29,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:23:29,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:23:29,967 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-10-15 20:23:30,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:30,599 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-10-15 20:23:30,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:23:30,600 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 20:23:30,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:30,600 INFO L225 Difference]: With dead ends: 113 [2020-10-15 20:23:30,600 INFO L226 Difference]: Without dead ends: 107 [2020-10-15 20:23:30,600 INFO L677 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 [2020-10-15 20:23:30,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-15 20:23:30,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-10-15 20:23:30,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 20:23:30,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 20:23:30,602 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-10-15 20:23:30,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:30,603 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 20:23:30,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:23:30,603 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 20:23:30,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:23:30,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:30,604 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:30,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-15 20:23:30,807 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:30,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:30,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-10-15 20:23:30,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:30,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700767041] [2020-10-15 20:23:30,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:30,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:30,978 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:30,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700767041] [2020-10-15 20:23:30,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321097159] [2020-10-15 20:23:30,979 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 [2020-10-15 20:23:31,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:23:31,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:31,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:23:31,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:31,042 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:31,055 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:31,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:31,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 20:23:31,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936998467] [2020-10-15 20:23:31,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:31,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:31,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:31,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:31,056 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-10-15 20:23:31,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:31,846 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-10-15 20:23:31,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:23:31,846 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 20:23:31,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:31,846 INFO L225 Difference]: With dead ends: 110 [2020-10-15 20:23:31,847 INFO L226 Difference]: Without dead ends: 104 [2020-10-15 20:23:31,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 20:23:31,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-15 20:23:31,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-10-15 20:23:31,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:23:31,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 20:23:31,849 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-10-15 20:23:31,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:31,849 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 20:23:31,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:31,849 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 20:23:31,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:23:31,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:31,849 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:32,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-10-15 20:23:32,050 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:32,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:32,051 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-10-15 20:23:32,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:32,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996772908] [2020-10-15 20:23:32,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:32,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:32,218 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:32,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996772908] [2020-10-15 20:23:32,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883536047] [2020-10-15 20:23:32,219 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 [2020-10-15 20:23:32,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 20:23:32,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:32,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:23:32,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:32,292 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:32,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:32,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 20:23:32,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366478485] [2020-10-15 20:23:32,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:23:32,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:32,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:23:32,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:23:32,293 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-10-15 20:23:33,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:33,055 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-10-15 20:23:33,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 20:23:33,056 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 20:23:33,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:33,056 INFO L225 Difference]: With dead ends: 111 [2020-10-15 20:23:33,056 INFO L226 Difference]: Without dead ends: 105 [2020-10-15 20:23:33,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 20:23:33,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-15 20:23:33,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-10-15 20:23:33,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 20:23:33,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-10-15 20:23:33,058 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-10-15 20:23:33,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:33,059 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-10-15 20:23:33,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:23:33,059 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-10-15 20:23:33,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:23:33,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:33,059 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:33,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:33,260 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:33,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:33,261 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-10-15 20:23:33,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:33,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412774354] [2020-10-15 20:23:33,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:33,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:33,428 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:33,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412774354] [2020-10-15 20:23:33,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999883599] [2020-10-15 20:23:33,429 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 [2020-10-15 20:23:33,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 20:23:33,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:33,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:23:33,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:33,499 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:33,512 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:33,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:33,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 20:23:33,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795244820] [2020-10-15 20:23:33,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:33,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:33,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:33,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:33,514 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-10-15 20:23:34,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:34,388 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-10-15 20:23:34,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:23:34,389 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 20:23:34,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:34,389 INFO L225 Difference]: With dead ends: 108 [2020-10-15 20:23:34,389 INFO L226 Difference]: Without dead ends: 102 [2020-10-15 20:23:34,389 INFO L677 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 [2020-10-15 20:23:34,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-15 20:23:34,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-10-15 20:23:34,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 20:23:34,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-15 20:23:34,391 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-10-15 20:23:34,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:34,391 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-15 20:23:34,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:34,391 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-15 20:23:34,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:23:34,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:34,392 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:34,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-15 20:23:34,593 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:34,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:34,593 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-10-15 20:23:34,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:34,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954930427] [2020-10-15 20:23:34,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:34,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:34,761 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:34,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954930427] [2020-10-15 20:23:34,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037679334] [2020-10-15 20:23:34,761 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 [2020-10-15 20:23:34,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:34,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:23:34,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:34,823 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:34,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:34,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 20:23:34,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497953481] [2020-10-15 20:23:34,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:23:34,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:34,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:23:34,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:23:34,824 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-10-15 20:23:35,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:35,556 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-10-15 20:23:35,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:23:35,557 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 20:23:35,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:35,558 INFO L225 Difference]: With dead ends: 128 [2020-10-15 20:23:35,558 INFO L226 Difference]: Without dead ends: 122 [2020-10-15 20:23:35,558 INFO L677 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 [2020-10-15 20:23:35,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-15 20:23:35,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-10-15 20:23:35,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 20:23:35,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-10-15 20:23:35,560 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-10-15 20:23:35,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:35,561 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-10-15 20:23:35,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:23:35,561 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-10-15 20:23:35,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:23:35,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:35,561 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:35,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:35,762 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:35,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:35,762 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-10-15 20:23:35,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:35,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538141823] [2020-10-15 20:23:35,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:35,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:35,929 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:35,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538141823] [2020-10-15 20:23:35,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282060614] [2020-10-15 20:23:35,930 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 [2020-10-15 20:23:35,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:23:35,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:35,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:23:35,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:35,994 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:36,008 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:36,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:36,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 20:23:36,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937918937] [2020-10-15 20:23:36,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:36,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:36,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:36,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:36,010 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-10-15 20:23:36,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:36,907 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-10-15 20:23:36,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:23:36,908 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 20:23:36,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:36,908 INFO L225 Difference]: With dead ends: 109 [2020-10-15 20:23:36,908 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 20:23:36,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 20:23:36,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 20:23:36,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-10-15 20:23:36,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 20:23:36,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-10-15 20:23:36,910 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-10-15 20:23:36,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:36,910 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-10-15 20:23:36,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:36,910 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-10-15 20:23:36,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:36,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:36,910 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:37,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:37,111 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:37,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:37,112 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-10-15 20:23:37,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:37,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409757780] [2020-10-15 20:23:37,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:37,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:37,353 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:37,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409757780] [2020-10-15 20:23:37,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249845223] [2020-10-15 20:23:37,354 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 [2020-10-15 20:23:37,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 20:23:37,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:37,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:37,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:37,413 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:37,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:37,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 20:23:37,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142520222] [2020-10-15 20:23:37,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:37,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:37,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:37,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:37,414 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-10-15 20:23:37,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:37,841 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-10-15 20:23:37,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 20:23:37,841 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 20:23:37,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:37,842 INFO L225 Difference]: With dead ends: 124 [2020-10-15 20:23:37,842 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 20:23:37,842 INFO L677 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 [2020-10-15 20:23:37,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 20:23:37,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-10-15 20:23:37,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:23:37,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 20:23:37,845 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 20:23:37,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:37,845 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 20:23:37,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:37,845 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 20:23:37,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:37,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:37,846 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:38,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:38,055 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:38,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:38,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-10-15 20:23:38,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:38,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267908183] [2020-10-15 20:23:38,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:38,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:38,304 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:38,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267908183] [2020-10-15 20:23:38,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519932927] [2020-10-15 20:23:38,304 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 [2020-10-15 20:23:38,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:23:38,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:38,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:38,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:38,371 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:38,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:38,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 20:23:38,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723033230] [2020-10-15 20:23:38,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:38,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:38,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:38,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:38,386 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 20:23:38,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:38,880 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-15 20:23:38,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:23:38,881 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 20:23:38,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:38,882 INFO L225 Difference]: With dead ends: 121 [2020-10-15 20:23:38,882 INFO L226 Difference]: Without dead ends: 115 [2020-10-15 20:23:38,882 INFO L677 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 [2020-10-15 20:23:38,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-15 20:23:38,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-10-15 20:23:38,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:23:38,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 20:23:38,884 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 20:23:38,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:38,885 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 20:23:38,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:38,885 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 20:23:38,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:38,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:38,885 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:39,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:39,086 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:39,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:39,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-10-15 20:23:39,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:39,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638402054] [2020-10-15 20:23:39,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:39,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:39,313 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:39,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638402054] [2020-10-15 20:23:39,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173038501] [2020-10-15 20:23:39,314 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 [2020-10-15 20:23:39,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 20:23:39,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:39,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:39,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:39,371 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:39,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:39,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 20:23:39,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199400426] [2020-10-15 20:23:39,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:39,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:39,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:39,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:39,373 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 20:23:39,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:39,841 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-15 20:23:39,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:23:39,842 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 20:23:39,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:39,842 INFO L225 Difference]: With dead ends: 118 [2020-10-15 20:23:39,842 INFO L226 Difference]: Without dead ends: 112 [2020-10-15 20:23:39,843 INFO L677 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 [2020-10-15 20:23:39,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-15 20:23:39,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-10-15 20:23:39,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:23:39,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 20:23:39,845 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 20:23:39,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:39,845 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 20:23:39,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:39,845 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 20:23:39,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:39,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:39,846 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:40,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:40,053 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:40,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:40,053 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-10-15 20:23:40,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:40,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889438036] [2020-10-15 20:23:40,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:40,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:40,277 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:40,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889438036] [2020-10-15 20:23:40,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583284030] [2020-10-15 20:23:40,278 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 [2020-10-15 20:23:40,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 20:23:40,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:40,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:40,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:40,347 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:40,358 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:40,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:40,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 20:23:40,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938574322] [2020-10-15 20:23:40,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:40,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:40,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:40,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:40,359 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 20:23:40,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:40,950 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-10-15 20:23:40,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:23:40,950 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 20:23:40,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:40,951 INFO L225 Difference]: With dead ends: 117 [2020-10-15 20:23:40,951 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 20:23:40,951 INFO L677 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 [2020-10-15 20:23:40,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 20:23:40,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-10-15 20:23:40,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:23:40,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 20:23:40,954 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 20:23:40,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:40,954 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 20:23:40,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:40,955 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 20:23:40,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:40,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:40,955 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:41,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-15 20:23:41,156 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:41,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:41,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-10-15 20:23:41,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:41,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124561639] [2020-10-15 20:23:41,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:41,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:41,380 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:41,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124561639] [2020-10-15 20:23:41,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028669120] [2020-10-15 20:23:41,381 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 [2020-10-15 20:23:41,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:41,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:41,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:41,442 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:41,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:41,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 20:23:41,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244167262] [2020-10-15 20:23:41,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:41,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:41,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:41,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:41,443 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 20:23:41,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:41,979 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-10-15 20:23:41,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:23:41,980 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 20:23:41,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:41,980 INFO L225 Difference]: With dead ends: 114 [2020-10-15 20:23:41,980 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 20:23:41,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 20:23:41,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 20:23:41,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-10-15 20:23:41,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:23:41,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 20:23:41,983 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 20:23:41,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:41,983 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 20:23:41,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:41,983 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 20:23:41,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:41,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:41,984 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:42,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-15 20:23:42,187 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:42,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:42,187 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-10-15 20:23:42,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:42,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637420259] [2020-10-15 20:23:42,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:42,407 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:42,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637420259] [2020-10-15 20:23:42,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212518374] [2020-10-15 20:23:42,408 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 [2020-10-15 20:23:42,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:23:42,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:42,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:42,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:42,477 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:42,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:42,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 20:23:42,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462738432] [2020-10-15 20:23:42,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:42,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:42,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:42,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:42,490 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 20:23:43,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:43,168 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-10-15 20:23:43,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:23:43,169 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 20:23:43,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:43,169 INFO L225 Difference]: With dead ends: 113 [2020-10-15 20:23:43,169 INFO L226 Difference]: Without dead ends: 107 [2020-10-15 20:23:43,170 INFO L677 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 [2020-10-15 20:23:43,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-15 20:23:43,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-10-15 20:23:43,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:23:43,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 20:23:43,172 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 20:23:43,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:43,172 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 20:23:43,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:43,173 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 20:23:43,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:43,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:43,173 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:43,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-15 20:23:43,380 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:43,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:43,381 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-10-15 20:23:43,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:43,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041396662] [2020-10-15 20:23:43,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:43,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:43,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041396662] [2020-10-15 20:23:43,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032284399] [2020-10-15 20:23:43,589 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 [2020-10-15 20:23:43,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 20:23:43,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:43,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:43,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:43,661 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:43,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:43,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 20:23:43,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224074163] [2020-10-15 20:23:43,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:43,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:43,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:43,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:43,663 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 20:23:44,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:44,252 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-10-15 20:23:44,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:23:44,253 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 20:23:44,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:44,253 INFO L225 Difference]: With dead ends: 110 [2020-10-15 20:23:44,253 INFO L226 Difference]: Without dead ends: 104 [2020-10-15 20:23:44,254 INFO L677 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 [2020-10-15 20:23:44,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-15 20:23:44,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-10-15 20:23:44,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:23:44,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 20:23:44,256 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 20:23:44,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:44,256 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 20:23:44,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:44,256 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 20:23:44,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:44,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:44,256 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:44,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-15 20:23:44,457 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:44,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:44,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-10-15 20:23:44,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:44,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263717284] [2020-10-15 20:23:44,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:44,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:44,668 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:44,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263717284] [2020-10-15 20:23:44,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989165302] [2020-10-15 20:23:44,668 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 [2020-10-15 20:23:44,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:23:44,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:44,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:44,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:44,733 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:44,746 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:44,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:44,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 20:23:44,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932013900] [2020-10-15 20:23:44,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:44,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:44,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:44,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:44,748 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 20:23:45,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:45,508 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-10-15 20:23:45,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:23:45,509 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 20:23:45,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:45,510 INFO L225 Difference]: With dead ends: 109 [2020-10-15 20:23:45,510 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 20:23:45,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 20:23:45,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 20:23:45,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-10-15 20:23:45,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:23:45,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 20:23:45,512 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 20:23:45,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:45,512 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 20:23:45,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:45,513 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 20:23:45,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:45,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:45,513 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:45,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:45,715 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:45,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:45,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-10-15 20:23:45,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:45,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597400177] [2020-10-15 20:23:45,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:45,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:45,918 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:45,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597400177] [2020-10-15 20:23:45,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263410505] [2020-10-15 20:23:45,919 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 [2020-10-15 20:23:45,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 20:23:45,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:45,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:45,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:45,990 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:45,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:45,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 20:23:45,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969987309] [2020-10-15 20:23:45,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:45,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:45,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:45,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:45,991 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 20:23:46,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:46,644 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-10-15 20:23:46,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:23:46,645 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 20:23:46,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:46,645 INFO L225 Difference]: With dead ends: 106 [2020-10-15 20:23:46,645 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 20:23:46,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 20:23:46,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 20:23:46,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-10-15 20:23:46,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:23:46,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 20:23:46,648 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 20:23:46,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:46,648 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 20:23:46,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:46,648 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 20:23:46,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:46,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:46,649 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:46,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-10-15 20:23:46,850 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:46,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:46,850 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-10-15 20:23:46,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:46,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556483008] [2020-10-15 20:23:46,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:46,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:47,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556483008] [2020-10-15 20:23:47,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071786743] [2020-10-15 20:23:47,051 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 [2020-10-15 20:23:47,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 20:23:47,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:47,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:47,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:47,125 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:47,138 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:47,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:47,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 20:23:47,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770834269] [2020-10-15 20:23:47,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:47,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:47,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:47,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:47,139 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 20:23:47,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:47,995 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-10-15 20:23:47,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:23:47,995 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 20:23:47,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:47,996 INFO L225 Difference]: With dead ends: 105 [2020-10-15 20:23:47,996 INFO L226 Difference]: Without dead ends: 99 [2020-10-15 20:23:47,997 INFO L677 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 [2020-10-15 20:23:47,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-15 20:23:47,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-10-15 20:23:47,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:23:47,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 20:23:47,999 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 20:23:47,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:47,999 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 20:23:47,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:47,999 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 20:23:47,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:47,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:47,999 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:48,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:48,200 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:48,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:48,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-10-15 20:23:48,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:48,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404531301] [2020-10-15 20:23:48,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:48,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:48,394 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:48,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404531301] [2020-10-15 20:23:48,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188105355] [2020-10-15 20:23:48,394 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 [2020-10-15 20:23:48,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:48,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:48,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:48,462 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:48,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:48,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 20:23:48,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515296827] [2020-10-15 20:23:48,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:48,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:48,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:48,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:48,464 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 20:23:49,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:49,180 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-10-15 20:23:49,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:23:49,181 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 20:23:49,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:49,181 INFO L225 Difference]: With dead ends: 102 [2020-10-15 20:23:49,181 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 20:23:49,182 INFO L677 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 [2020-10-15 20:23:49,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 20:23:49,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-10-15 20:23:49,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:23:49,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 20:23:49,184 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 20:23:49,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:49,184 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 20:23:49,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:49,185 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 20:23:49,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:49,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:49,185 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:49,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:49,386 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:49,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:49,386 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-10-15 20:23:49,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:49,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078826236] [2020-10-15 20:23:49,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:49,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:49,584 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:49,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078826236] [2020-10-15 20:23:49,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977441105] [2020-10-15 20:23:49,585 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 [2020-10-15 20:23:49,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:23:49,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:49,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:49,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:49,651 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:49,666 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:49,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:49,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 20:23:49,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995685494] [2020-10-15 20:23:49,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:49,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:49,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:49,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:49,667 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 20:23:50,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:50,624 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-15 20:23:50,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:23:50,625 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 20:23:50,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:50,626 INFO L225 Difference]: With dead ends: 101 [2020-10-15 20:23:50,626 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 20:23:50,626 INFO L677 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 [2020-10-15 20:23:50,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 20:23:50,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-10-15 20:23:50,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:23:50,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 20:23:50,628 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 20:23:50,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:50,628 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 20:23:50,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:50,629 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 20:23:50,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:50,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:50,629 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:50,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-10-15 20:23:50,833 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:50,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:50,833 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-10-15 20:23:50,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:50,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136771280] [2020-10-15 20:23:50,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:50,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:51,026 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:51,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136771280] [2020-10-15 20:23:51,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806381345] [2020-10-15 20:23:51,026 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 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 [2020-10-15 20:23:51,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 20:23:51,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:51,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:51,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:51,094 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:51,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:51,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 20:23:51,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180071382] [2020-10-15 20:23:51,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:51,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:51,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:51,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:51,096 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 20:23:51,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:51,870 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-10-15 20:23:51,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 20:23:51,871 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 20:23:51,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:51,871 INFO L225 Difference]: With dead ends: 98 [2020-10-15 20:23:51,871 INFO L226 Difference]: Without dead ends: 92 [2020-10-15 20:23:51,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 20:23:51,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-15 20:23:51,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-10-15 20:23:51,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:23:51,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 20:23:51,874 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 20:23:51,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:51,874 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 20:23:51,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:51,874 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 20:23:51,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:51,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:51,875 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:52,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:52,076 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:52,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:52,076 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-10-15 20:23:52,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:52,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833210540] [2020-10-15 20:23:52,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:52,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:52,267 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:52,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833210540] [2020-10-15 20:23:52,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119083607] [2020-10-15 20:23:52,268 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 [2020-10-15 20:23:52,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:23:52,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:52,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:52,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:52,334 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:52,348 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:52,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:52,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 20:23:52,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932190650] [2020-10-15 20:23:52,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:52,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:52,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:52,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:52,350 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 20:23:53,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:53,406 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-10-15 20:23:53,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:23:53,407 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 20:23:53,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:53,407 INFO L225 Difference]: With dead ends: 97 [2020-10-15 20:23:53,407 INFO L226 Difference]: Without dead ends: 91 [2020-10-15 20:23:53,408 INFO L677 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 [2020-10-15 20:23:53,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-15 20:23:53,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-10-15 20:23:53,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:23:53,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 20:23:53,410 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 20:23:53,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:53,411 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 20:23:53,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:53,411 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 20:23:53,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:53,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:53,411 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:53,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-15 20:23:53,612 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:53,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:53,612 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-10-15 20:23:53,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:53,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868502769] [2020-10-15 20:23:53,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:53,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:53,798 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:53,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868502769] [2020-10-15 20:23:53,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958837067] [2020-10-15 20:23:53,799 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 [2020-10-15 20:23:53,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 20:23:53,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:53,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:53,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:53,865 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:53,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:53,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 20:23:53,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014985704] [2020-10-15 20:23:53,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:53,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:53,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:53,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:53,866 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 20:23:54,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:54,687 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-10-15 20:23:54,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:23:54,687 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 20:23:54,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:54,688 INFO L225 Difference]: With dead ends: 113 [2020-10-15 20:23:54,688 INFO L226 Difference]: Without dead ends: 107 [2020-10-15 20:23:54,689 INFO L677 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 [2020-10-15 20:23:54,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-15 20:23:54,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-10-15 20:23:54,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-15 20:23:54,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-10-15 20:23:54,691 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-10-15 20:23:54,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:54,691 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-10-15 20:23:54,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:54,691 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-10-15 20:23:54,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:54,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:54,692 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:54,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-15 20:23:54,892 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:54,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:54,893 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-10-15 20:23:54,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:54,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122654422] [2020-10-15 20:23:54,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:54,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:55,080 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:55,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122654422] [2020-10-15 20:23:55,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680776565] [2020-10-15 20:23:55,081 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 [2020-10-15 20:23:55,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 20:23:55,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:55,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:55,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:55,180 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:55,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:55,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 20:23:55,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128555757] [2020-10-15 20:23:55,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:55,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:55,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:55,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:55,182 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-10-15 20:23:56,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:56,116 INFO L93 Difference]: Finished difference Result 92 states and 229 transitions. [2020-10-15 20:23:56,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:23:56,116 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 20:23:56,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:56,117 INFO L225 Difference]: With dead ends: 92 [2020-10-15 20:23:56,117 INFO L226 Difference]: Without dead ends: 84 [2020-10-15 20:23:56,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=746, Invalid=1906, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 20:23:56,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-15 20:23:56,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 61. [2020-10-15 20:23:56,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-15 20:23:56,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-10-15 20:23:56,120 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-10-15 20:23:56,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:56,120 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-10-15 20:23:56,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:56,120 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-10-15 20:23:56,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:56,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:56,121 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:56,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-15 20:23:56,321 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:56,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:56,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-10-15 20:23:56,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:56,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980102499] [2020-10-15 20:23:56,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:56,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:56,493 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:56,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980102499] [2020-10-15 20:23:56,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899457251] [2020-10-15 20:23:56,494 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 [2020-10-15 20:23:56,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:56,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:56,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:56,560 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:23:56,580 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:56,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:56,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 20:23:56,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156494647] [2020-10-15 20:23:56,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:56,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:56,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:56,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:56,582 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-10-15 20:23:57,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:57,562 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-15 20:23:57,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:23:57,562 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 20:23:57,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:57,563 INFO L225 Difference]: With dead ends: 108 [2020-10-15 20:23:57,563 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 20:23:57,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 20:23:57,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 20:23:57,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-10-15 20:23:57,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 20:23:57,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-15 20:23:57,565 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-10-15 20:23:57,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:57,566 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-15 20:23:57,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:57,566 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-15 20:23:57,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:57,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:57,566 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:57,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-15 20:23:57,767 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:57,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:57,767 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-10-15 20:23:57,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:57,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047187522] [2020-10-15 20:23:57,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:57,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:57,972 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:57,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047187522] [2020-10-15 20:23:57,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057691639] [2020-10-15 20:23:57,973 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 [2020-10-15 20:23:58,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:23:58,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:58,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:58,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:58,041 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:23:58,062 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:58,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:58,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:23:58,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618001814] [2020-10-15 20:23:58,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:23:58,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:58,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:23:58,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:23:58,063 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-10-15 20:23:59,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:59,135 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-10-15 20:23:59,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:23:59,136 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:23:59,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:59,137 INFO L225 Difference]: With dead ends: 90 [2020-10-15 20:23:59,137 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 20:23:59,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 20:23:59,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 20:23:59,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-15 20:23:59,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 20:23:59,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-10-15 20:23:59,139 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-10-15 20:23:59,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:59,139 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-10-15 20:23:59,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:23:59,139 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-10-15 20:23:59,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:59,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:59,140 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:59,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:59,340 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:59,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:59,341 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-10-15 20:23:59,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:59,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266327755] [2020-10-15 20:23:59,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:59,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:59,610 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:59,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266327755] [2020-10-15 20:23:59,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962549047] [2020-10-15 20:23:59,611 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 [2020-10-15 20:23:59,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 20:23:59,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:59,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:59,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:59,670 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:59,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:59,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 20:23:59,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483508650] [2020-10-15 20:23:59,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:59,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:59,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:59,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:59,671 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-10-15 20:24:00,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:00,083 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-10-15 20:24:00,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 20:24:00,084 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 20:24:00,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:00,085 INFO L225 Difference]: With dead ends: 96 [2020-10-15 20:24:00,085 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 20:24:00,085 INFO L677 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 [2020-10-15 20:24:00,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 20:24:00,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-10-15 20:24:00,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 20:24:00,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-10-15 20:24:00,087 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-10-15 20:24:00,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:00,087 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-10-15 20:24:00,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:24:00,087 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-10-15 20:24:00,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:24:00,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:00,088 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:00,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:00,288 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:00,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:00,289 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-10-15 20:24:00,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:00,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194927304] [2020-10-15 20:24:00,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:00,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:00,562 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:00,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194927304] [2020-10-15 20:24:00,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773106078] [2020-10-15 20:24:00,562 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 [2020-10-15 20:24:00,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:24:00,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:00,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:24:00,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:00,635 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:00,645 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:00,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:00,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:24:00,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080260293] [2020-10-15 20:24:00,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:00,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:00,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:00,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:00,646 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-10-15 20:24:01,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:01,138 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-10-15 20:24:01,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:24:01,138 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:24:01,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:01,139 INFO L225 Difference]: With dead ends: 114 [2020-10-15 20:24:01,139 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 20:24:01,140 INFO L677 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 [2020-10-15 20:24:01,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 20:24:01,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-10-15 20:24:01,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 20:24:01,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-10-15 20:24:01,142 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-10-15 20:24:01,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:01,143 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-10-15 20:24:01,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:01,143 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-10-15 20:24:01,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:24:01,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:01,143 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:01,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:01,352 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:01,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:01,352 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-10-15 20:24:01,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:01,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633213960] [2020-10-15 20:24:01,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:01,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:01,624 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:01,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633213960] [2020-10-15 20:24:01,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275928136] [2020-10-15 20:24:01,624 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 [2020-10-15 20:24:01,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 20:24:01,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:01,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:24:01,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:01,683 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:01,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:01,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 20:24:01,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827994073] [2020-10-15 20:24:01,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:24:01,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:01,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:24:01,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:24:01,684 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-10-15 20:24:02,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:02,210 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-10-15 20:24:02,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:24:02,211 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 20:24:02,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:02,211 INFO L225 Difference]: With dead ends: 115 [2020-10-15 20:24:02,211 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 20:24:02,212 INFO L677 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 [2020-10-15 20:24:02,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 20:24:02,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-10-15 20:24:02,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 20:24:02,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-10-15 20:24:02,214 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-10-15 20:24:02,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:02,214 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-10-15 20:24:02,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:24:02,214 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-10-15 20:24:02,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:24:02,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:02,215 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:02,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:02,415 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:02,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:02,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-10-15 20:24:02,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:02,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966710721] [2020-10-15 20:24:02,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:02,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:02,685 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:02,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966710721] [2020-10-15 20:24:02,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463261465] [2020-10-15 20:24:02,686 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 [2020-10-15 20:24:02,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 20:24:02,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:02,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:24:02,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:02,758 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:02,769 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:02,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:02,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:24:02,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393447817] [2020-10-15 20:24:02,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:02,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:02,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:02,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:02,770 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-10-15 20:24:03,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:03,345 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-10-15 20:24:03,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:24:03,346 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:24:03,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:03,346 INFO L225 Difference]: With dead ends: 129 [2020-10-15 20:24:03,346 INFO L226 Difference]: Without dead ends: 123 [2020-10-15 20:24:03,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 20:24:03,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-15 20:24:03,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-10-15 20:24:03,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 20:24:03,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-10-15 20:24:03,348 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-10-15 20:24:03,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:03,349 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-10-15 20:24:03,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:03,349 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-10-15 20:24:03,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:24:03,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:03,349 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:03,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:03,556 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:03,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:03,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-10-15 20:24:03,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:03,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79399052] [2020-10-15 20:24:03,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:03,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:03,805 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:03,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79399052] [2020-10-15 20:24:03,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726128714] [2020-10-15 20:24:03,806 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 [2020-10-15 20:24:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:03,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:24:03,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:03,867 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:03,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:03,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 20:24:03,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665760003] [2020-10-15 20:24:03,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:24:03,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:03,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:24:03,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:24:03,868 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-10-15 20:24:04,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:04,435 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-10-15 20:24:04,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:24:04,435 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 20:24:04,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:04,436 INFO L225 Difference]: With dead ends: 129 [2020-10-15 20:24:04,436 INFO L226 Difference]: Without dead ends: 123 [2020-10-15 20:24:04,436 INFO L677 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 [2020-10-15 20:24:04,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-15 20:24:04,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-10-15 20:24:04,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-15 20:24:04,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-10-15 20:24:04,438 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-10-15 20:24:04,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:04,438 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-10-15 20:24:04,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:24:04,438 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-10-15 20:24:04,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:24:04,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:04,439 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:04,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:04,640 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:04,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:04,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-10-15 20:24:04,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:04,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616435835] [2020-10-15 20:24:04,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:04,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:04,897 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:04,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616435835] [2020-10-15 20:24:04,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628371389] [2020-10-15 20:24:04,898 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 [2020-10-15 20:24:04,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:24:04,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:04,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:24:04,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:04,965 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:04,977 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:04,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:04,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:24:04,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996277492] [2020-10-15 20:24:04,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:04,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:04,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:04,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:04,978 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-10-15 20:24:05,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:05,622 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-10-15 20:24:05,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:24:05,622 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:24:05,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:05,623 INFO L225 Difference]: With dead ends: 126 [2020-10-15 20:24:05,623 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 20:24:05,623 INFO L677 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 [2020-10-15 20:24:05,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 20:24:05,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-10-15 20:24:05,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-15 20:24:05,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-10-15 20:24:05,626 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-10-15 20:24:05,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:05,626 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-10-15 20:24:05,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:05,626 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-10-15 20:24:05,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:24:05,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:05,626 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:05,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:05,831 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:05,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:05,831 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-10-15 20:24:05,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:05,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77304407] [2020-10-15 20:24:05,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:05,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:06,068 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:06,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77304407] [2020-10-15 20:24:06,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726620006] [2020-10-15 20:24:06,068 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 [2020-10-15 20:24:06,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 20:24:06,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:06,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:24:06,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:06,134 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:06,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:06,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 20:24:06,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943042663] [2020-10-15 20:24:06,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:24:06,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:06,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:24:06,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:24:06,135 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-10-15 20:24:06,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:06,789 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-10-15 20:24:06,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:24:06,790 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 20:24:06,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:06,790 INFO L225 Difference]: With dead ends: 127 [2020-10-15 20:24:06,790 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 20:24:06,791 INFO L677 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 [2020-10-15 20:24:06,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 20:24:06,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-10-15 20:24:06,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 20:24:06,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-10-15 20:24:06,792 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-10-15 20:24:06,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:06,793 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-10-15 20:24:06,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:24:06,793 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-10-15 20:24:06,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:24:06,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:06,793 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:06,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-15 20:24:06,999 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:06,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:06,999 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-10-15 20:24:07,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:07,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115902726] [2020-10-15 20:24:07,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:07,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:07,249 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:07,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115902726] [2020-10-15 20:24:07,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982442778] [2020-10-15 20:24:07,250 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 [2020-10-15 20:24:07,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:24:07,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:07,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:24:07,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:07,319 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:07,335 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:07,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:07,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:24:07,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956811681] [2020-10-15 20:24:07,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:07,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:07,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:07,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:07,336 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-10-15 20:24:08,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:08,088 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-10-15 20:24:08,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:24:08,089 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:24:08,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:08,089 INFO L225 Difference]: With dead ends: 124 [2020-10-15 20:24:08,089 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 20:24:08,089 INFO L677 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 [2020-10-15 20:24:08,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 20:24:08,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-10-15 20:24:08,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:24:08,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-10-15 20:24:08,091 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-10-15 20:24:08,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:08,091 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-10-15 20:24:08,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:08,091 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-10-15 20:24:08,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:24:08,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:08,091 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:08,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-15 20:24:08,292 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:08,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:08,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-10-15 20:24:08,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:08,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951432768] [2020-10-15 20:24:08,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:08,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:08,529 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:08,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951432768] [2020-10-15 20:24:08,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268738623] [2020-10-15 20:24:08,530 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 [2020-10-15 20:24:08,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 20:24:08,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:08,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:24:08,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:08,595 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:08,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:08,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 20:24:08,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617801116] [2020-10-15 20:24:08,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:24:08,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:08,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:24:08,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:24:08,597 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-10-15 20:24:09,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:09,285 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-10-15 20:24:09,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:24:09,286 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 20:24:09,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:09,286 INFO L225 Difference]: With dead ends: 125 [2020-10-15 20:24:09,286 INFO L226 Difference]: Without dead ends: 119 [2020-10-15 20:24:09,286 INFO L677 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 [2020-10-15 20:24:09,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-15 20:24:09,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-10-15 20:24:09,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 20:24:09,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-10-15 20:24:09,288 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-10-15 20:24:09,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:09,288 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-10-15 20:24:09,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:24:09,288 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-10-15 20:24:09,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:24:09,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:09,289 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:09,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-15 20:24:09,490 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:09,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:09,490 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-10-15 20:24:09,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:09,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59455231] [2020-10-15 20:24:09,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:09,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:09,726 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:09,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59455231] [2020-10-15 20:24:09,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443289858] [2020-10-15 20:24:09,727 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 [2020-10-15 20:24:09,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 20:24:09,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:09,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:24:09,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:09,804 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:09,818 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:09,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:09,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:24:09,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407585197] [2020-10-15 20:24:09,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:09,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:09,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:09,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:09,824 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-10-15 20:24:10,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:10,660 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-10-15 20:24:10,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:24:10,661 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:24:10,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:10,661 INFO L225 Difference]: With dead ends: 122 [2020-10-15 20:24:10,662 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 20:24:10,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 20:24:10,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 20:24:10,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-10-15 20:24:10,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 20:24:10,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-10-15 20:24:10,663 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-10-15 20:24:10,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:10,663 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-10-15 20:24:10,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:10,664 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-10-15 20:24:10,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:24:10,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:10,664 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:10,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-15 20:24:10,866 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:10,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:10,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-10-15 20:24:10,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:10,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792429393] [2020-10-15 20:24:10,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:10,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:11,090 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:11,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792429393] [2020-10-15 20:24:11,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924866071] [2020-10-15 20:24:11,091 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 [2020-10-15 20:24:11,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:11,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:24:11,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:11,155 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:11,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:11,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 20:24:11,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443035746] [2020-10-15 20:24:11,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:24:11,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:11,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:24:11,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:24:11,156 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-10-15 20:24:11,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:11,922 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-15 20:24:11,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 20:24:11,923 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 20:24:11,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:11,924 INFO L225 Difference]: With dead ends: 123 [2020-10-15 20:24:11,924 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 20:24:11,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 20:24:11,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 20:24:11,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-10-15 20:24:11,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 20:24:11,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-10-15 20:24:11,926 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-10-15 20:24:11,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:11,926 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-10-15 20:24:11,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:24:11,927 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-10-15 20:24:11,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:24:11,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:11,927 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:12,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:12,128 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:12,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:12,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-10-15 20:24:12,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:12,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770225258] [2020-10-15 20:24:12,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:12,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:12,353 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:12,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770225258] [2020-10-15 20:24:12,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090105412] [2020-10-15 20:24:12,354 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 [2020-10-15 20:24:12,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:24:12,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:12,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:24:12,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:12,421 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:12,439 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:12,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:12,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:24:12,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404874945] [2020-10-15 20:24:12,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:12,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:12,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:12,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:12,440 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-10-15 20:24:13,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:13,361 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-10-15 20:24:13,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:24:13,361 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:24:13,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:13,362 INFO L225 Difference]: With dead ends: 120 [2020-10-15 20:24:13,362 INFO L226 Difference]: Without dead ends: 114 [2020-10-15 20:24:13,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 20:24:13,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-15 20:24:13,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-10-15 20:24:13,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 20:24:13,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-10-15 20:24:13,364 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-10-15 20:24:13,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:13,364 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-10-15 20:24:13,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:13,364 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-10-15 20:24:13,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:24:13,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:13,364 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:13,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:13,565 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:13,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:13,566 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-10-15 20:24:13,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:13,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257617998] [2020-10-15 20:24:13,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:13,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:13,785 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:13,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257617998] [2020-10-15 20:24:13,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879698046] [2020-10-15 20:24:13,786 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 [2020-10-15 20:24:13,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 20:24:13,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:13,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:24:13,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:13,854 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:13,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:13,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 20:24:13,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148384835] [2020-10-15 20:24:13,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:24:13,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:13,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:24:13,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:24:13,855 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-10-15 20:24:14,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:14,677 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-15 20:24:14,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:24:14,677 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 20:24:14,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:14,678 INFO L225 Difference]: With dead ends: 121 [2020-10-15 20:24:14,678 INFO L226 Difference]: Without dead ends: 115 [2020-10-15 20:24:14,678 INFO L677 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 [2020-10-15 20:24:14,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-15 20:24:14,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-10-15 20:24:14,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:24:14,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 20:24:14,680 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-10-15 20:24:14,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:14,680 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 20:24:14,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:24:14,680 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 20:24:14,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:24:14,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:14,680 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:14,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-10-15 20:24:14,881 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:14,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:14,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-10-15 20:24:14,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:14,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853203323] [2020-10-15 20:24:14,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:14,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:15,102 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:15,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853203323] [2020-10-15 20:24:15,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370073320] [2020-10-15 20:24:15,103 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 [2020-10-15 20:24:15,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:24:15,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:15,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:24:15,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:15,173 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:15,194 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:15,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:15,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:24:15,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152554771] [2020-10-15 20:24:15,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:15,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:15,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:15,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:15,195 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-10-15 20:24:16,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:16,230 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-15 20:24:16,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:24:16,230 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:24:16,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:16,231 INFO L225 Difference]: With dead ends: 118 [2020-10-15 20:24:16,231 INFO L226 Difference]: Without dead ends: 112 [2020-10-15 20:24:16,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 20:24:16,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-15 20:24:16,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-10-15 20:24:16,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:24:16,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 20:24:16,234 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-10-15 20:24:16,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:16,234 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 20:24:16,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:16,234 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 20:24:16,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:24:16,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:16,234 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:16,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:16,435 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:16,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:16,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-10-15 20:24:16,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:16,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860925237] [2020-10-15 20:24:16,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:16,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:16,657 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:16,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860925237] [2020-10-15 20:24:16,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497647811] [2020-10-15 20:24:16,658 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 [2020-10-15 20:24:16,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 20:24:16,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:16,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:24:16,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:16,726 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:16,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:16,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 20:24:16,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036593655] [2020-10-15 20:24:16,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:24:16,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:16,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:24:16,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:24:16,727 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-10-15 20:24:17,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:17,599 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-10-15 20:24:17,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 20:24:17,600 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 20:24:17,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:17,601 INFO L225 Difference]: With dead ends: 119 [2020-10-15 20:24:17,601 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 20:24:17,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 20:24:17,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 20:24:17,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-10-15 20:24:17,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 20:24:17,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-10-15 20:24:17,603 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-10-15 20:24:17,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:17,604 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-10-15 20:24:17,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:24:17,604 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-10-15 20:24:17,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:24:17,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:17,604 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:17,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:17,810 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:17,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:17,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-10-15 20:24:17,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:17,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019200111] [2020-10-15 20:24:17,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:17,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:18,029 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:18,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019200111] [2020-10-15 20:24:18,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338975845] [2020-10-15 20:24:18,030 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 [2020-10-15 20:24:18,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 20:24:18,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:18,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:24:18,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:18,108 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:18,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:18,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:24:18,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969301927] [2020-10-15 20:24:18,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:18,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:18,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:18,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:18,124 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-10-15 20:24:19,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:19,236 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-10-15 20:24:19,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 20:24:19,237 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:24:19,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:19,237 INFO L225 Difference]: With dead ends: 116 [2020-10-15 20:24:19,237 INFO L226 Difference]: Without dead ends: 110 [2020-10-15 20:24:19,237 INFO L677 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 [2020-10-15 20:24:19,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-15 20:24:19,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-10-15 20:24:19,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 20:24:19,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-15 20:24:19,240 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-10-15 20:24:19,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:19,240 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-15 20:24:19,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:19,240 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-15 20:24:19,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:24:19,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:19,240 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:19,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:19,441 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:19,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:19,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-10-15 20:24:19,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:19,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282085130] [2020-10-15 20:24:19,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:19,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:19,657 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:19,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282085130] [2020-10-15 20:24:19,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091011191] [2020-10-15 20:24:19,658 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 [2020-10-15 20:24:19,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:19,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:24:19,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:19,721 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:19,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:19,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 20:24:19,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854771608] [2020-10-15 20:24:19,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:24:19,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:19,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:24:19,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:24:19,723 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-10-15 20:24:20,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:20,661 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-10-15 20:24:20,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 20:24:20,662 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 20:24:20,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:20,663 INFO L225 Difference]: With dead ends: 136 [2020-10-15 20:24:20,663 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 20:24:20,664 INFO L677 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 [2020-10-15 20:24:20,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 20:24:20,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-10-15 20:24:20,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 20:24:20,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-10-15 20:24:20,666 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-10-15 20:24:20,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:20,666 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-10-15 20:24:20,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:24:20,666 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-10-15 20:24:20,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:24:20,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:20,667 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:20,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:20,874 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:20,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:20,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-10-15 20:24:20,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:20,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609991771] [2020-10-15 20:24:20,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:20,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:21,085 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:21,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609991771] [2020-10-15 20:24:21,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115504557] [2020-10-15 20:24:21,086 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 [2020-10-15 20:24:21,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:24:21,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:21,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:24:21,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:21,152 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:21,167 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:21,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:21,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:24:21,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527094967] [2020-10-15 20:24:21,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:21,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:21,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:21,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:21,169 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-10-15 20:24:22,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:22,319 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-10-15 20:24:22,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 20:24:22,320 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:24:22,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:22,320 INFO L225 Difference]: With dead ends: 117 [2020-10-15 20:24:22,320 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 20:24:22,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 20:24:22,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 20:24:22,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-10-15 20:24:22,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-15 20:24:22,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-10-15 20:24:22,322 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-10-15 20:24:22,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:22,322 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-10-15 20:24:22,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:22,322 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-10-15 20:24:22,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:22,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:22,322 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:22,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:22,523 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:22,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:22,524 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-10-15 20:24:22,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:22,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725672675] [2020-10-15 20:24:22,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:22,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:22,835 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:22,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725672675] [2020-10-15 20:24:22,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606869230] [2020-10-15 20:24:22,836 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 [2020-10-15 20:24:22,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 20:24:22,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:22,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:22,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:22,899 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:22,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:22,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 20:24:22,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187680298] [2020-10-15 20:24:22,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:22,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:22,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:22,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:22,900 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-10-15 20:24:23,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:23,405 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-10-15 20:24:23,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:24:23,406 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 20:24:23,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:23,406 INFO L225 Difference]: With dead ends: 134 [2020-10-15 20:24:23,406 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 20:24:23,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 20:24:23,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 20:24:23,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-10-15 20:24:23,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:24:23,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 20:24:23,408 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 20:24:23,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:23,408 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 20:24:23,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:23,408 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 20:24:23,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:23,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:23,409 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:23,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-10-15 20:24:23,610 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:23,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:23,610 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-10-15 20:24:23,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:23,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949758799] [2020-10-15 20:24:23,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:23,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:23,932 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:23,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949758799] [2020-10-15 20:24:23,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354190624] [2020-10-15 20:24:23,932 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 [2020-10-15 20:24:23,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:24:23,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:23,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:23,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:24,002 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:24,014 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:24,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:24,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:24:24,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475397710] [2020-10-15 20:24:24,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:24,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:24,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:24,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:24,015 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 20:24:24,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:24,583 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-10-15 20:24:24,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:24:24,584 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:24:24,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:24,584 INFO L225 Difference]: With dead ends: 131 [2020-10-15 20:24:24,585 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 20:24:24,585 INFO L677 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 [2020-10-15 20:24:24,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 20:24:24,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-10-15 20:24:24,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:24:24,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 20:24:24,587 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 20:24:24,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:24,587 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 20:24:24,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:24,588 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 20:24:24,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:24,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:24,588 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:24,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-15 20:24:24,789 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:24,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:24,790 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-10-15 20:24:24,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:24,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727183422] [2020-10-15 20:24:24,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:24,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:25,089 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:25,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727183422] [2020-10-15 20:24:25,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27058822] [2020-10-15 20:24:25,089 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 [2020-10-15 20:24:25,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 20:24:25,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:25,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:25,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:25,166 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:25,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:25,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 20:24:25,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753887193] [2020-10-15 20:24:25,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:25,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:25,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:25,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:25,168 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 20:24:25,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:25,755 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-10-15 20:24:25,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:24:25,756 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 20:24:25,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:25,756 INFO L225 Difference]: With dead ends: 128 [2020-10-15 20:24:25,756 INFO L226 Difference]: Without dead ends: 122 [2020-10-15 20:24:25,757 INFO L677 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 [2020-10-15 20:24:25,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-15 20:24:25,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-10-15 20:24:25,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:24:25,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 20:24:25,759 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 20:24:25,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:25,759 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 20:24:25,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:25,759 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 20:24:25,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:25,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:25,760 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:25,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:25,960 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:25,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:25,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-10-15 20:24:25,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:25,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262923159] [2020-10-15 20:24:25,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:25,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:26,252 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:26,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262923159] [2020-10-15 20:24:26,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512381084] [2020-10-15 20:24:26,253 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 [2020-10-15 20:24:26,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 20:24:26,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:26,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:26,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:26,327 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:26,340 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:26,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:26,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:24:26,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445182034] [2020-10-15 20:24:26,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:26,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:26,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:26,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:26,341 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 20:24:27,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:27,052 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-10-15 20:24:27,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:24:27,053 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:24:27,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:27,053 INFO L225 Difference]: With dead ends: 127 [2020-10-15 20:24:27,054 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 20:24:27,054 INFO L677 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 [2020-10-15 20:24:27,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 20:24:27,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-10-15 20:24:27,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:24:27,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 20:24:27,056 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 20:24:27,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:27,056 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 20:24:27,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:27,056 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 20:24:27,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:27,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:27,057 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:27,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-10-15 20:24:27,258 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:27,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:27,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-10-15 20:24:27,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:27,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816253425] [2020-10-15 20:24:27,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:27,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:27,536 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:27,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816253425] [2020-10-15 20:24:27,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336588833] [2020-10-15 20:24:27,536 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 [2020-10-15 20:24:27,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:27,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:27,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:27,596 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:27,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:27,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 20:24:27,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122111597] [2020-10-15 20:24:27,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:27,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:27,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:27,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:27,597 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 20:24:28,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:28,255 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-10-15 20:24:28,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:24:28,256 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 20:24:28,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:28,257 INFO L225 Difference]: With dead ends: 124 [2020-10-15 20:24:28,257 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 20:24:28,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 20:24:28,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 20:24:28,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-10-15 20:24:28,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:24:28,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 20:24:28,259 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 20:24:28,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:28,259 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 20:24:28,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:28,259 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 20:24:28,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:28,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:28,260 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:28,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:28,460 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:28,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:28,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-10-15 20:24:28,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:28,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213052602] [2020-10-15 20:24:28,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:28,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:28,743 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:28,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213052602] [2020-10-15 20:24:28,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077280703] [2020-10-15 20:24:28,744 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 [2020-10-15 20:24:28,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:24:28,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:28,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:28,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:28,818 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:28,837 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:28,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:28,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:24:28,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28681580] [2020-10-15 20:24:28,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:28,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:28,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:28,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:28,838 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 20:24:29,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:29,639 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-10-15 20:24:29,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:24:29,640 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:24:29,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:29,640 INFO L225 Difference]: With dead ends: 123 [2020-10-15 20:24:29,641 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 20:24:29,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 20:24:29,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 20:24:29,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-10-15 20:24:29,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:24:29,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 20:24:29,643 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 20:24:29,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:29,643 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 20:24:29,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:29,644 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 20:24:29,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:29,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:29,644 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:29,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:29,845 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:29,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:29,845 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-10-15 20:24:29,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:29,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894123268] [2020-10-15 20:24:29,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:29,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:30,113 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:30,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894123268] [2020-10-15 20:24:30,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001555666] [2020-10-15 20:24:30,114 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 [2020-10-15 20:24:30,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 20:24:30,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:30,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:30,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:30,180 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:30,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:30,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 20:24:30,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475675853] [2020-10-15 20:24:30,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:30,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:30,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:30,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:30,182 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 20:24:30,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:30,907 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-15 20:24:30,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:24:30,908 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 20:24:30,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:30,908 INFO L225 Difference]: With dead ends: 120 [2020-10-15 20:24:30,909 INFO L226 Difference]: Without dead ends: 114 [2020-10-15 20:24:30,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 20:24:30,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-15 20:24:30,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-10-15 20:24:30,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:24:30,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 20:24:30,911 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 20:24:30,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:30,911 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 20:24:30,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:30,912 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 20:24:30,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:30,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:30,912 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:31,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:31,113 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:31,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:31,113 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-10-15 20:24:31,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:31,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821479697] [2020-10-15 20:24:31,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:31,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:31,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821479697] [2020-10-15 20:24:31,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516861596] [2020-10-15 20:24:31,387 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 [2020-10-15 20:24:31,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:24:31,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:31,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:31,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:31,461 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:31,476 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:31,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:31,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:24:31,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883727080] [2020-10-15 20:24:31,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:31,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:31,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:31,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:31,477 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 20:24:32,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:32,378 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-10-15 20:24:32,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:24:32,379 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:24:32,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:32,379 INFO L225 Difference]: With dead ends: 119 [2020-10-15 20:24:32,379 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 20:24:32,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 20:24:32,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 20:24:32,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-10-15 20:24:32,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:24:32,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 20:24:32,382 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 20:24:32,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:32,383 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 20:24:32,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:32,383 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 20:24:32,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:32,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:32,383 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:32,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:32,587 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:32,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:32,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-10-15 20:24:32,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:32,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634313916] [2020-10-15 20:24:32,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:32,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:32,847 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:32,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634313916] [2020-10-15 20:24:32,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302092374] [2020-10-15 20:24:32,848 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 [2020-10-15 20:24:32,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 20:24:32,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:32,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:32,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:32,914 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:32,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:32,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 20:24:32,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543909510] [2020-10-15 20:24:32,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:32,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:32,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:32,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:32,916 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 20:24:33,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:33,708 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-10-15 20:24:33,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:24:33,717 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 20:24:33,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:33,717 INFO L225 Difference]: With dead ends: 116 [2020-10-15 20:24:33,717 INFO L226 Difference]: Without dead ends: 110 [2020-10-15 20:24:33,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 20:24:33,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-15 20:24:33,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-10-15 20:24:33,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:24:33,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 20:24:33,719 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 20:24:33,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:33,719 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 20:24:33,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:33,720 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 20:24:33,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:33,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:33,720 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:33,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-10-15 20:24:33,921 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:33,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:33,921 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-10-15 20:24:33,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:33,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254432336] [2020-10-15 20:24:33,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:33,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:34,180 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:34,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254432336] [2020-10-15 20:24:34,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493613776] [2020-10-15 20:24:34,181 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 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 [2020-10-15 20:24:34,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 20:24:34,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:34,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:34,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:34,264 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:34,277 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:34,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:34,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:24:34,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103393062] [2020-10-15 20:24:34,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:34,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:34,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:34,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:34,279 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 20:24:35,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:35,277 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-10-15 20:24:35,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:24:35,277 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:24:35,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:35,278 INFO L225 Difference]: With dead ends: 115 [2020-10-15 20:24:35,278 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 20:24:35,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 20:24:35,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 20:24:35,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-10-15 20:24:35,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:24:35,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 20:24:35,281 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 20:24:35,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:35,281 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 20:24:35,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:35,282 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 20:24:35,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:35,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:35,282 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:35,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:35,490 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:35,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:35,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-10-15 20:24:35,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:35,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013628309] [2020-10-15 20:24:35,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:35,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:35,736 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:35,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013628309] [2020-10-15 20:24:35,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888571922] [2020-10-15 20:24:35,736 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 [2020-10-15 20:24:35,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:35,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:35,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:35,801 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:35,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:35,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 20:24:35,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665081709] [2020-10-15 20:24:35,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:35,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:35,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:35,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:35,802 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 20:24:36,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:36,669 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-10-15 20:24:36,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 20:24:36,669 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 20:24:36,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:36,670 INFO L225 Difference]: With dead ends: 112 [2020-10-15 20:24:36,670 INFO L226 Difference]: Without dead ends: 106 [2020-10-15 20:24:36,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 20:24:36,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-15 20:24:36,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-10-15 20:24:36,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:24:36,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 20:24:36,672 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 20:24:36,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:36,673 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 20:24:36,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:36,673 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 20:24:36,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:36,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:36,673 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:36,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-10-15 20:24:36,874 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:36,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:36,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-10-15 20:24:36,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:36,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23847921] [2020-10-15 20:24:36,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:36,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:37,128 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:37,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23847921] [2020-10-15 20:24:37,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227158397] [2020-10-15 20:24:37,129 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 [2020-10-15 20:24:37,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:24:37,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:37,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:37,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:37,200 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:37,215 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:37,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:37,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:24:37,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611332681] [2020-10-15 20:24:37,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:37,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:37,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:37,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:37,216 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 20:24:38,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:38,301 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-10-15 20:24:38,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:24:38,302 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:24:38,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:38,302 INFO L225 Difference]: With dead ends: 111 [2020-10-15 20:24:38,302 INFO L226 Difference]: Without dead ends: 105 [2020-10-15 20:24:38,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 20:24:38,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-15 20:24:38,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-10-15 20:24:38,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:24:38,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 20:24:38,306 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 20:24:38,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:38,306 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 20:24:38,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:38,306 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 20:24:38,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:38,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:38,307 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:38,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-15 20:24:38,511 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:38,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:38,511 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-10-15 20:24:38,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:38,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17495241] [2020-10-15 20:24:38,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:38,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:38,754 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:38,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17495241] [2020-10-15 20:24:38,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045663629] [2020-10-15 20:24:38,754 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 [2020-10-15 20:24:38,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 20:24:38,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:38,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:38,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:38,827 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:38,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:38,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 20:24:38,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973241868] [2020-10-15 20:24:38,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:38,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:38,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:38,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:38,828 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 20:24:39,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:39,762 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-15 20:24:39,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:24:39,763 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 20:24:39,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:39,763 INFO L225 Difference]: With dead ends: 108 [2020-10-15 20:24:39,763 INFO L226 Difference]: Without dead ends: 102 [2020-10-15 20:24:39,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 20:24:39,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-15 20:24:39,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-10-15 20:24:39,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:24:39,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 20:24:39,766 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 20:24:39,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:39,766 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 20:24:39,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:39,766 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 20:24:39,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:39,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:39,767 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:39,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:39,970 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:39,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:39,971 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-10-15 20:24:39,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:39,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34255349] [2020-10-15 20:24:39,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:39,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:40,222 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:40,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34255349] [2020-10-15 20:24:40,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157209398] [2020-10-15 20:24:40,223 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 [2020-10-15 20:24:40,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:24:40,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:40,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:40,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:40,293 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:40,310 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:40,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:40,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:24:40,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817191790] [2020-10-15 20:24:40,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:40,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:40,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:40,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:40,312 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 20:24:41,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:41,501 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-15 20:24:41,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 20:24:41,501 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:24:41,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:41,502 INFO L225 Difference]: With dead ends: 107 [2020-10-15 20:24:41,502 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 20:24:41,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 20:24:41,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 20:24:41,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-10-15 20:24:41,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:24:41,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 20:24:41,504 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 20:24:41,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:41,505 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 20:24:41,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:41,505 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 20:24:41,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:41,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:41,505 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:41,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:41,710 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:41,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:41,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-10-15 20:24:41,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:41,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65481780] [2020-10-15 20:24:41,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:41,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:41,951 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:41,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65481780] [2020-10-15 20:24:41,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568930825] [2020-10-15 20:24:41,952 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 [2020-10-15 20:24:41,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 20:24:42,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:42,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:42,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:42,028 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:42,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:42,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 20:24:42,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033946554] [2020-10-15 20:24:42,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:42,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:42,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:42,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:42,029 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 20:24:43,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:43,011 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-10-15 20:24:43,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 20:24:43,013 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 20:24:43,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:43,013 INFO L225 Difference]: With dead ends: 104 [2020-10-15 20:24:43,013 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 20:24:43,014 INFO L677 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 [2020-10-15 20:24:43,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 20:24:43,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-10-15 20:24:43,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:24:43,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 20:24:43,016 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 20:24:43,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:43,016 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 20:24:43,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:43,016 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 20:24:43,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:43,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:43,016 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:43,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:43,217 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:43,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:43,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-10-15 20:24:43,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:43,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504388615] [2020-10-15 20:24:43,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:43,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:43,459 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:43,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504388615] [2020-10-15 20:24:43,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498097868] [2020-10-15 20:24:43,459 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 [2020-10-15 20:24:43,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 20:24:43,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:43,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:43,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:43,545 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:43,562 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:43,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:43,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:24:43,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155773211] [2020-10-15 20:24:43,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:43,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:43,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:43,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:43,564 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 20:24:44,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:44,845 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-10-15 20:24:44,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 20:24:44,846 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:24:44,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:44,847 INFO L225 Difference]: With dead ends: 103 [2020-10-15 20:24:44,847 INFO L226 Difference]: Without dead ends: 97 [2020-10-15 20:24:44,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 20:24:44,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-15 20:24:44,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-10-15 20:24:44,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:24:44,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 20:24:44,850 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 20:24:44,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:44,851 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 20:24:44,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:44,851 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 20:24:44,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:44,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:44,851 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:45,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-10-15 20:24:45,061 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:45,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:45,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-10-15 20:24:45,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:45,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794900339] [2020-10-15 20:24:45,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:45,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:45,305 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:45,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794900339] [2020-10-15 20:24:45,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892511624] [2020-10-15 20:24:45,305 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 [2020-10-15 20:24:45,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:45,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:45,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:45,378 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:45,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:45,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 20:24:45,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605784179] [2020-10-15 20:24:45,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:45,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:45,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:45,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:45,380 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 20:24:46,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:46,442 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-10-15 20:24:46,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 20:24:46,443 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 20:24:46,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:46,443 INFO L225 Difference]: With dead ends: 119 [2020-10-15 20:24:46,443 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 20:24:46,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 20:24:46,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 20:24:46,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-10-15 20:24:46,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-15 20:24:46,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-10-15 20:24:46,451 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-10-15 20:24:46,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:46,452 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-10-15 20:24:46,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:46,452 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-10-15 20:24:46,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:46,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:46,452 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:46,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:46,653 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:46,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:46,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-10-15 20:24:46,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:46,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78053220] [2020-10-15 20:24:46,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:46,896 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:46,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78053220] [2020-10-15 20:24:46,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476565520] [2020-10-15 20:24:46,897 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 [2020-10-15 20:24:46,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:24:46,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:46,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:46,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:46,968 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:46,986 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:46,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:46,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:24:46,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271236151] [2020-10-15 20:24:46,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:46,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:46,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:46,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:46,988 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-10-15 20:24:48,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:48,308 INFO L93 Difference]: Finished difference Result 100 states and 249 transitions. [2020-10-15 20:24:48,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 20:24:48,309 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:24:48,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:48,309 INFO L225 Difference]: With dead ends: 100 [2020-10-15 20:24:48,310 INFO L226 Difference]: Without dead ends: 92 [2020-10-15 20:24:48,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 20:24:48,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-15 20:24:48,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-10-15 20:24:48,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-15 20:24:48,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-10-15 20:24:48,312 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-10-15 20:24:48,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:48,312 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-10-15 20:24:48,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:48,312 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-10-15 20:24:48,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:48,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:48,312 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:48,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:48,513 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:48,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:48,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-10-15 20:24:48,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:48,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151059029] [2020-10-15 20:24:48,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:48,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:48,762 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:48,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151059029] [2020-10-15 20:24:48,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78141146] [2020-10-15 20:24:48,762 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 [2020-10-15 20:24:48,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 20:24:48,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:48,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:48,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:48,837 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:24:48,860 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:48,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:48,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:24:48,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159162075] [2020-10-15 20:24:48,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:48,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:48,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:48,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:48,862 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-10-15 20:24:50,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:50,093 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-10-15 20:24:50,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 20:24:50,094 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:24:50,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:50,094 INFO L225 Difference]: With dead ends: 116 [2020-10-15 20:24:50,094 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 20:24:50,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 20:24:50,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 20:24:50,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-10-15 20:24:50,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 20:24:50,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-15 20:24:50,096 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-10-15 20:24:50,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:50,096 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-15 20:24:50,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:50,096 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-15 20:24:50,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:50,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:50,097 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:50,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:50,297 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:50,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:50,298 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-10-15 20:24:50,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:50,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202730610] [2020-10-15 20:24:50,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:50,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:50,561 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:50,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202730610] [2020-10-15 20:24:50,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752415785] [2020-10-15 20:24:50,562 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 [2020-10-15 20:24:50,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:24:50,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:50,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:50,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:50,635 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:24:50,657 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:50,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:50,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:24:50,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066379861] [2020-10-15 20:24:50,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:24:50,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:50,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:24:50,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:24:50,659 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-10-15 20:24:51,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:51,995 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-10-15 20:24:51,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 20:24:51,996 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:24:51,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:51,997 INFO L225 Difference]: With dead ends: 96 [2020-10-15 20:24:51,997 INFO L226 Difference]: Without dead ends: 91 [2020-10-15 20:24:51,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 20:24:51,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-15 20:24:51,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-10-15 20:24:51,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 20:24:52,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-10-15 20:24:52,000 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-10-15 20:24:52,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:52,000 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-10-15 20:24:52,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:24:52,000 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-10-15 20:24:52,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:52,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:52,001 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:52,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:52,209 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:52,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:52,210 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-10-15 20:24:52,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:52,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373637774] [2020-10-15 20:24:52,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:52,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:52,552 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:52,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373637774] [2020-10-15 20:24:52,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979723028] [2020-10-15 20:24:52,553 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 [2020-10-15 20:24:52,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 20:24:52,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:52,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:52,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:52,613 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:52,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:52,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:24:52,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211065331] [2020-10-15 20:24:52,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:52,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:52,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:52,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:52,614 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-10-15 20:24:53,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:53,180 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-10-15 20:24:53,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:24:53,180 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:24:53,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:53,181 INFO L225 Difference]: With dead ends: 102 [2020-10-15 20:24:53,181 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 20:24:53,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 20:24:53,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 20:24:53,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-10-15 20:24:53,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:24:53,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-10-15 20:24:53,184 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-10-15 20:24:53,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:53,184 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-10-15 20:24:53,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:53,184 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-10-15 20:24:53,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:53,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:53,185 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:53,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-10-15 20:24:53,385 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:53,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:53,386 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-10-15 20:24:53,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:53,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611963416] [2020-10-15 20:24:53,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:53,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:53,730 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:53,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611963416] [2020-10-15 20:24:53,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188904452] [2020-10-15 20:24:53,731 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 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 [2020-10-15 20:24:53,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 20:24:53,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:53,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:53,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:53,806 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:53,817 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:53,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:53,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:24:53,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894456331] [2020-10-15 20:24:53,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:24:53,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:53,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:24:53,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:24:53,818 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-10-15 20:24:54,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:54,449 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-10-15 20:24:54,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:24:54,450 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:24:54,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:54,450 INFO L225 Difference]: With dead ends: 122 [2020-10-15 20:24:54,450 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 20:24:54,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 20:24:54,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 20:24:54,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-10-15 20:24:54,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-15 20:24:54,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-10-15 20:24:54,453 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-10-15 20:24:54,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:54,453 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-10-15 20:24:54,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:24:54,453 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-10-15 20:24:54,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:54,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:54,453 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:54,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-10-15 20:24:54,654 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:54,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:54,655 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-10-15 20:24:54,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:54,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807445587] [2020-10-15 20:24:54,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:54,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:55,000 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:55,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807445587] [2020-10-15 20:24:55,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413436707] [2020-10-15 20:24:55,001 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 [2020-10-15 20:24:55,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:55,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:55,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:55,058 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:55,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:55,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:24:55,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815964643] [2020-10-15 20:24:55,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:55,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:55,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:55,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:55,059 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-10-15 20:24:55,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:55,722 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-10-15 20:24:55,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:24:55,723 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:24:55,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:55,724 INFO L225 Difference]: With dead ends: 123 [2020-10-15 20:24:55,724 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 20:24:55,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 20:24:55,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 20:24:55,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-10-15 20:24:55,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 20:24:55,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-10-15 20:24:55,726 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-10-15 20:24:55,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:55,726 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-10-15 20:24:55,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:55,726 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-10-15 20:24:55,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:55,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:55,726 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:55,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-10-15 20:24:55,927 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:55,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:55,928 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-10-15 20:24:55,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:55,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875569586] [2020-10-15 20:24:55,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:55,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:56,268 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:56,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875569586] [2020-10-15 20:24:56,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342474968] [2020-10-15 20:24:56,269 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 [2020-10-15 20:24:56,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:24:56,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:56,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:56,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:56,340 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:56,351 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:56,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:56,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:24:56,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362003959] [2020-10-15 20:24:56,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:24:56,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:56,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:24:56,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:24:56,352 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-10-15 20:24:57,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:57,055 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-10-15 20:24:57,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:24:57,055 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:24:57,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:57,056 INFO L225 Difference]: With dead ends: 139 [2020-10-15 20:24:57,056 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 20:24:57,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 20:24:57,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 20:24:57,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-10-15 20:24:57,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:24:57,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-10-15 20:24:57,059 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-10-15 20:24:57,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:57,059 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-10-15 20:24:57,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:24:57,059 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-10-15 20:24:57,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:57,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:57,059 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:57,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-10-15 20:24:57,268 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:57,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:57,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-10-15 20:24:57,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:57,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721029765] [2020-10-15 20:24:57,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:57,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:57,587 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:57,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721029765] [2020-10-15 20:24:57,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042518477] [2020-10-15 20:24:57,588 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 [2020-10-15 20:24:57,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 20:24:57,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:57,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:57,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:57,652 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:57,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:57,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:24:57,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439074028] [2020-10-15 20:24:57,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:57,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:57,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:57,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:57,653 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-10-15 20:24:58,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:58,341 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-10-15 20:24:58,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:24:58,342 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:24:58,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:58,342 INFO L225 Difference]: With dead ends: 139 [2020-10-15 20:24:58,342 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 20:24:58,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=618, Invalid=1638, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 20:24:58,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 20:24:58,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-10-15 20:24:58,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 20:24:58,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-10-15 20:24:58,344 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-10-15 20:24:58,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:58,345 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-10-15 20:24:58,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:58,345 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-10-15 20:24:58,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:58,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:58,345 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:58,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:58,550 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:58,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:58,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-10-15 20:24:58,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:58,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6860204] [2020-10-15 20:24:58,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:58,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:58,884 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:58,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6860204] [2020-10-15 20:24:58,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190652866] [2020-10-15 20:24:58,885 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 [2020-10-15 20:24:58,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:24:58,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:58,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:58,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:58,957 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:58,969 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:58,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:58,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:24:58,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086475458] [2020-10-15 20:24:58,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:24:58,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:58,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:24:58,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:24:58,970 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-10-15 20:24:59,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:59,768 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-10-15 20:24:59,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:24:59,769 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:24:59,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:59,769 INFO L225 Difference]: With dead ends: 136 [2020-10-15 20:24:59,769 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 20:24:59,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 20:24:59,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 20:24:59,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-10-15 20:24:59,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 20:24:59,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-10-15 20:24:59,772 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-10-15 20:24:59,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:59,772 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-10-15 20:24:59,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:24:59,772 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-10-15 20:24:59,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:59,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:59,773 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:59,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-10-15 20:24:59,973 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:59,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:59,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-10-15 20:24:59,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:59,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632199380] [2020-10-15 20:24:59,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:59,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:00,279 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:00,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632199380] [2020-10-15 20:25:00,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003036440] [2020-10-15 20:25:00,279 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 [2020-10-15 20:25:00,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 20:25:00,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:00,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:25:00,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:00,345 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:00,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:00,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:25:00,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43674978] [2020-10-15 20:25:00,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:25:00,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:00,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:25:00,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:25:00,347 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-10-15 20:25:01,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:01,135 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-10-15 20:25:01,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:25:01,136 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:25:01,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:01,136 INFO L225 Difference]: With dead ends: 137 [2020-10-15 20:25:01,137 INFO L226 Difference]: Without dead ends: 131 [2020-10-15 20:25:01,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 20:25:01,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-15 20:25:01,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-10-15 20:25:01,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 20:25:01,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-10-15 20:25:01,139 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-10-15 20:25:01,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:01,140 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-10-15 20:25:01,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:25:01,140 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-10-15 20:25:01,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:25:01,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:01,140 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:01,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:01,341 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:01,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:01,342 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-10-15 20:25:01,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:01,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528450383] [2020-10-15 20:25:01,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:01,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:01,656 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:01,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528450383] [2020-10-15 20:25:01,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372469571] [2020-10-15 20:25:01,656 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 [2020-10-15 20:25:01,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 20:25:01,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:01,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:25:01,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:01,736 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:01,753 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:01,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:01,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:25:01,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651571350] [2020-10-15 20:25:01,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:01,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:01,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:01,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:01,754 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states. [2020-10-15 20:25:02,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:02,645 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2020-10-15 20:25:02,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:25:02,645 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:25:02,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:02,646 INFO L225 Difference]: With dead ends: 134 [2020-10-15 20:25:02,646 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 20:25:02,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 20:25:02,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 20:25:02,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-10-15 20:25:02,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 20:25:02,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions. [2020-10-15 20:25:02,649 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27 [2020-10-15 20:25:02,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:02,649 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 195 transitions. [2020-10-15 20:25:02,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:02,649 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions. [2020-10-15 20:25:02,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:25:02,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:02,650 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:02,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-10-15 20:25:02,854 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:02,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:02,854 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times [2020-10-15 20:25:02,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:02,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788376962] [2020-10-15 20:25:02,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:02,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:03,148 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:03,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788376962] [2020-10-15 20:25:03,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271207298] [2020-10-15 20:25:03,149 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 [2020-10-15 20:25:03,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:03,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:25:03,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:03,215 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:03,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:03,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:25:03,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551499474] [2020-10-15 20:25:03,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:25:03,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:03,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:25:03,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:25:03,217 INFO L87 Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states. [2020-10-15 20:25:04,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:04,070 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-10-15 20:25:04,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 20:25:04,071 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:25:04,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:04,071 INFO L225 Difference]: With dead ends: 135 [2020-10-15 20:25:04,071 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 20:25:04,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=706, Invalid=1946, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 20:25:04,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 20:25:04,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-10-15 20:25:04,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:25:04,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-10-15 20:25:04,074 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27 [2020-10-15 20:25:04,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:04,074 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-10-15 20:25:04,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:25:04,074 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-10-15 20:25:04,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:25:04,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:04,075 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:04,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:04,275 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:04,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:04,276 INFO L82 PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times [2020-10-15 20:25:04,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:04,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011365967] [2020-10-15 20:25:04,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:04,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:04,578 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:04,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011365967] [2020-10-15 20:25:04,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528445855] [2020-10-15 20:25:04,579 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 [2020-10-15 20:25:04,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:25:04,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:04,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:25:04,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:04,652 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:04,666 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:04,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:04,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:25:04,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285403919] [2020-10-15 20:25:04,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:04,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:04,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:04,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:04,667 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states. [2020-10-15 20:25:05,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:05,667 INFO L93 Difference]: Finished difference Result 132 states and 305 transitions. [2020-10-15 20:25:05,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:25:05,668 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:25:05,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:05,668 INFO L225 Difference]: With dead ends: 132 [2020-10-15 20:25:05,668 INFO L226 Difference]: Without dead ends: 126 [2020-10-15 20:25:05,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=712, Invalid=2044, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 20:25:05,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-15 20:25:05,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2020-10-15 20:25:05,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:25:05,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 201 transitions. [2020-10-15 20:25:05,670 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 201 transitions. Word has length 27 [2020-10-15 20:25:05,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:05,670 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 201 transitions. [2020-10-15 20:25:05,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:05,670 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 201 transitions. [2020-10-15 20:25:05,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:25:05,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:05,671 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:05,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:05,872 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:05,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:05,872 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 207 times [2020-10-15 20:25:05,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:05,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997906099] [2020-10-15 20:25:05,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:05,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:06,160 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:06,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997906099] [2020-10-15 20:25:06,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355170871] [2020-10-15 20:25:06,160 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 [2020-10-15 20:25:06,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 20:25:06,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:06,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:25:06,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:06,232 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:06,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:06,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:25:06,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657068441] [2020-10-15 20:25:06,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:25:06,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:06,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:25:06,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:25:06,233 INFO L87 Difference]: Start difference. First operand 80 states and 201 transitions. Second operand 23 states. [2020-10-15 20:25:07,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:07,149 INFO L93 Difference]: Finished difference Result 133 states and 309 transitions. [2020-10-15 20:25:07,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:25:07,149 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:25:07,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:07,150 INFO L225 Difference]: With dead ends: 133 [2020-10-15 20:25:07,150 INFO L226 Difference]: Without dead ends: 127 [2020-10-15 20:25:07,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=774, Invalid=2088, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 20:25:07,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-15 20:25:07,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-10-15 20:25:07,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 20:25:07,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-10-15 20:25:07,151 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 27 [2020-10-15 20:25:07,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:07,151 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-10-15 20:25:07,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:25:07,152 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-10-15 20:25:07,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:25:07,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:07,152 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:07,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:07,353 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:07,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:07,353 INFO L82 PathProgramCache]: Analyzing trace with hash 496892893, now seen corresponding path program 208 times [2020-10-15 20:25:07,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:07,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105271122] [2020-10-15 20:25:07,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:07,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:07,640 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:07,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105271122] [2020-10-15 20:25:07,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141535661] [2020-10-15 20:25:07,641 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 [2020-10-15 20:25:07,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:25:07,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:07,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:25:07,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:07,714 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:07,732 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:07,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:07,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:25:07,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950049910] [2020-10-15 20:25:07,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:07,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:07,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:07,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:07,733 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 24 states. [2020-10-15 20:25:08,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:08,841 INFO L93 Difference]: Finished difference Result 130 states and 303 transitions. [2020-10-15 20:25:08,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:25:08,842 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:25:08,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:08,842 INFO L225 Difference]: With dead ends: 130 [2020-10-15 20:25:08,842 INFO L226 Difference]: Without dead ends: 124 [2020-10-15 20:25:08,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 20:25:08,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-15 20:25:08,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2020-10-15 20:25:08,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 20:25:08,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-10-15 20:25:08,845 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 27 [2020-10-15 20:25:08,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:08,845 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-10-15 20:25:08,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:08,845 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-10-15 20:25:08,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:25:08,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:08,846 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:09,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:09,046 INFO L429 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:09,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:09,047 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 209 times [2020-10-15 20:25:09,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:09,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874939745] [2020-10-15 20:25:09,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:09,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:09,333 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:09,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874939745] [2020-10-15 20:25:09,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498852948] [2020-10-15 20:25:09,334 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 [2020-10-15 20:25:09,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 20:25:09,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:09,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:25:09,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:09,417 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:09,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:09,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:25:09,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771007438] [2020-10-15 20:25:09,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:25:09,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:09,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:25:09,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:25:09,418 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 23 states. [2020-10-15 20:25:10,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:10,410 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-10-15 20:25:10,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 20:25:10,410 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:25:10,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:10,411 INFO L225 Difference]: With dead ends: 131 [2020-10-15 20:25:10,411 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 20:25:10,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=858, Invalid=2222, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 20:25:10,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 20:25:10,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-10-15 20:25:10,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-15 20:25:10,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-10-15 20:25:10,413 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 27 [2020-10-15 20:25:10,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:10,413 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-10-15 20:25:10,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:25:10,413 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-10-15 20:25:10,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:25:10,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:10,414 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:10,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-10-15 20:25:10,622 INFO L429 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:10,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:10,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 210 times [2020-10-15 20:25:10,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:10,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038004023] [2020-10-15 20:25:10,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:10,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:10,895 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:10,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038004023] [2020-10-15 20:25:10,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787432307] [2020-10-15 20:25:10,895 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 [2020-10-15 20:25:10,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 20:25:10,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:10,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:25:10,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:10,972 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:10,989 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:10,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:10,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:25:10,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582881358] [2020-10-15 20:25:10,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:10,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:10,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:10,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:10,990 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 24 states. [2020-10-15 20:25:12,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:12,170 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-10-15 20:25:12,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 20:25:12,170 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:25:12,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:12,171 INFO L225 Difference]: With dead ends: 128 [2020-10-15 20:25:12,171 INFO L226 Difference]: Without dead ends: 122 [2020-10-15 20:25:12,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=866, Invalid=2326, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 20:25:12,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-15 20:25:12,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-10-15 20:25:12,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-15 20:25:12,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-10-15 20:25:12,174 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 27 [2020-10-15 20:25:12,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:12,174 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-10-15 20:25:12,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:12,174 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-10-15 20:25:12,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:25:12,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:12,174 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:12,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-10-15 20:25:12,375 INFO L429 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:12,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:12,376 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 211 times [2020-10-15 20:25:12,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:12,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434097333] [2020-10-15 20:25:12,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:12,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:12,654 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:12,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434097333] [2020-10-15 20:25:12,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013961469] [2020-10-15 20:25:12,655 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 [2020-10-15 20:25:12,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:12,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:25:12,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:12,723 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:12,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:12,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:25:12,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719949853] [2020-10-15 20:25:12,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:25:12,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:12,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:25:12,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:25:12,724 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 23 states. [2020-10-15 20:25:13,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:13,762 INFO L93 Difference]: Finished difference Result 129 states and 305 transitions. [2020-10-15 20:25:13,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 20:25:13,763 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:25:13,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:13,763 INFO L225 Difference]: With dead ends: 129 [2020-10-15 20:25:13,763 INFO L226 Difference]: Without dead ends: 123 [2020-10-15 20:25:13,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=958, Invalid=2348, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 20:25:13,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-15 20:25:13,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-10-15 20:25:13,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:25:13,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 20:25:13,765 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 27 [2020-10-15 20:25:13,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:13,765 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 20:25:13,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:25:13,766 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 20:25:13,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:25:13,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:13,766 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:13,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-10-15 20:25:13,967 INFO L429 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:13,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:13,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1726955231, now seen corresponding path program 212 times [2020-10-15 20:25:13,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:13,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056806603] [2020-10-15 20:25:13,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:13,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:14,248 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:14,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056806603] [2020-10-15 20:25:14,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844747745] [2020-10-15 20:25:14,249 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 [2020-10-15 20:25:14,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:25:14,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:14,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:25:14,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:14,318 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:14,336 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:14,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:14,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:25:14,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061626434] [2020-10-15 20:25:14,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:14,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:14,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:14,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:14,337 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 24 states. [2020-10-15 20:25:15,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:15,625 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-10-15 20:25:15,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 20:25:15,625 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:25:15,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:15,626 INFO L225 Difference]: With dead ends: 126 [2020-10-15 20:25:15,626 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 20:25:15,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=967, Invalid=2455, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 20:25:15,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 20:25:15,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-10-15 20:25:15,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:25:15,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 20:25:15,628 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 27 [2020-10-15 20:25:15,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:15,628 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 20:25:15,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:15,628 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 20:25:15,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:25:15,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:15,629 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:15,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-10-15 20:25:15,830 INFO L429 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:15,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:15,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 213 times [2020-10-15 20:25:15,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:15,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472230212] [2020-10-15 20:25:15,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:15,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:16,108 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:16,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472230212] [2020-10-15 20:25:16,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229036658] [2020-10-15 20:25:16,109 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 [2020-10-15 20:25:16,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 20:25:16,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:16,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:25:16,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:16,188 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:16,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:16,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:25:16,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447381150] [2020-10-15 20:25:16,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:25:16,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:16,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:25:16,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:25:16,190 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 23 states. [2020-10-15 20:25:17,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:17,301 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2020-10-15 20:25:17,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 20:25:17,302 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:25:17,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:17,302 INFO L225 Difference]: With dead ends: 127 [2020-10-15 20:25:17,302 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 20:25:17,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1074, Invalid=2466, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 20:25:17,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 20:25:17,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2020-10-15 20:25:17,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-15 20:25:17,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-10-15 20:25:17,305 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 27 [2020-10-15 20:25:17,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:17,305 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-10-15 20:25:17,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:25:17,305 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-10-15 20:25:17,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:25:17,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:17,305 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:17,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:17,506 INFO L429 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:17,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:17,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1239872381, now seen corresponding path program 214 times [2020-10-15 20:25:17,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:17,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627144130] [2020-10-15 20:25:17,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:17,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:17,780 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:17,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627144130] [2020-10-15 20:25:17,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537792493] [2020-10-15 20:25:17,781 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 [2020-10-15 20:25:17,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:25:17,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:17,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:25:17,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:17,855 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:17,874 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:17,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:17,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:25:17,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717540415] [2020-10-15 20:25:17,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:17,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:17,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:17,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:17,876 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-10-15 20:25:19,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:19,273 INFO L93 Difference]: Finished difference Result 124 states and 297 transitions. [2020-10-15 20:25:19,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 20:25:19,274 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:25:19,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:19,274 INFO L225 Difference]: With dead ends: 124 [2020-10-15 20:25:19,274 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 20:25:19,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1084, Invalid=2576, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 20:25:19,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 20:25:19,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2020-10-15 20:25:19,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 20:25:19,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-15 20:25:19,277 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 27 [2020-10-15 20:25:19,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:19,277 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-15 20:25:19,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:19,277 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-15 20:25:19,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:25:19,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:19,277 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:19,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-10-15 20:25:19,478 INFO L429 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:19,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:19,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 215 times [2020-10-15 20:25:19,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:19,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710325699] [2020-10-15 20:25:19,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:19,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:19,758 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:19,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710325699] [2020-10-15 20:25:19,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446415535] [2020-10-15 20:25:19,759 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 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 [2020-10-15 20:25:19,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 20:25:19,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:19,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:25:19,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:19,835 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:19,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:19,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:25:19,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496997872] [2020-10-15 20:25:19,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:25:19,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:19,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:25:19,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:25:19,836 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 23 states. [2020-10-15 20:25:21,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:21,019 INFO L93 Difference]: Finished difference Result 144 states and 347 transitions. [2020-10-15 20:25:21,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 20:25:21,020 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:25:21,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:21,020 INFO L225 Difference]: With dead ends: 144 [2020-10-15 20:25:21,021 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 20:25:21,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1206, Invalid=2576, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 20:25:21,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 20:25:21,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2020-10-15 20:25:21,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 20:25:21,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 245 transitions. [2020-10-15 20:25:21,023 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 245 transitions. Word has length 27 [2020-10-15 20:25:21,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:21,024 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 245 transitions. [2020-10-15 20:25:21,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:25:21,024 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 245 transitions. [2020-10-15 20:25:21,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:25:21,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:21,025 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:21,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:21,232 INFO L429 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:21,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:21,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1239365531, now seen corresponding path program 216 times [2020-10-15 20:25:21,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:21,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483838569] [2020-10-15 20:25:21,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:21,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:21,508 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:21,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483838569] [2020-10-15 20:25:21,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525748895] [2020-10-15 20:25:21,509 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 [2020-10-15 20:25:21,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 20:25:21,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:21,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:25:21,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:21,589 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:21,608 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:21,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:21,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:25:21,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252501298] [2020-10-15 20:25:21,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:21,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:21,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:21,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:21,610 INFO L87 Difference]: Start difference. First operand 94 states and 245 transitions. Second operand 24 states. [2020-10-15 20:25:23,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:23,037 INFO L93 Difference]: Finished difference Result 125 states and 303 transitions. [2020-10-15 20:25:23,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 20:25:23,038 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:25:23,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:23,038 INFO L225 Difference]: With dead ends: 125 [2020-10-15 20:25:23,038 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 20:25:23,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 20:25:23,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 20:25:23,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-10-15 20:25:23,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 20:25:23,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-10-15 20:25:23,040 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-10-15 20:25:23,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:23,040 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-10-15 20:25:23,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:23,040 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-10-15 20:25:23,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:23,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:23,040 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:23,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-10-15 20:25:23,241 INFO L429 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:23,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:23,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 217 times [2020-10-15 20:25:23,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:23,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733269503] [2020-10-15 20:25:23,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:23,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:23,631 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:23,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733269503] [2020-10-15 20:25:23,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660390768] [2020-10-15 20:25:23,632 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 [2020-10-15 20:25:23,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:23,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:23,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:23,689 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:23,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:23,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 20:25:23,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216107159] [2020-10-15 20:25:23,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:23,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:23,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:23,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:23,690 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 24 states. [2020-10-15 20:25:24,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:24,349 INFO L93 Difference]: Finished difference Result 144 states and 339 transitions. [2020-10-15 20:25:24,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:25:24,350 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 20:25:24,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:24,350 INFO L225 Difference]: With dead ends: 144 [2020-10-15 20:25:24,350 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 20:25:24,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=603, Invalid=1377, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 20:25:24,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 20:25:24,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 93. [2020-10-15 20:25:24,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 20:25:24,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 20:25:24,354 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 20:25:24,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:24,354 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 20:25:24,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:24,354 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 20:25:24,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:24,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:24,355 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:24,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:24,559 INFO L429 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:24,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:24,559 INFO L82 PathProgramCache]: Analyzing trace with hash 627867998, now seen corresponding path program 218 times [2020-10-15 20:25:24,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:24,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106158708] [2020-10-15 20:25:24,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:24,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:24,960 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:24,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106158708] [2020-10-15 20:25:24,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818609594] [2020-10-15 20:25:24,961 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 [2020-10-15 20:25:25,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:25:25,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:25,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:25,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:25,032 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:25,044 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:25,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:25,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 20:25:25,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074051422] [2020-10-15 20:25:25,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:25:25,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:25,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:25:25,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:25:25,045 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 20:25:25,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:25,794 INFO L93 Difference]: Finished difference Result 141 states and 333 transitions. [2020-10-15 20:25:25,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:25:25,795 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 20:25:25,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:25,795 INFO L225 Difference]: With dead ends: 141 [2020-10-15 20:25:25,795 INFO L226 Difference]: Without dead ends: 135 [2020-10-15 20:25:25,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=653, Invalid=1603, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 20:25:25,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-15 20:25:25,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 92. [2020-10-15 20:25:25,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 20:25:25,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 20:25:25,798 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 20:25:25,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:25,798 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 20:25:25,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:25:25,798 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 20:25:25,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:25,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:25,798 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:25,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2020-10-15 20:25:25,999 INFO L429 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:26,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:26,000 INFO L82 PathProgramCache]: Analyzing trace with hash -556056612, now seen corresponding path program 219 times [2020-10-15 20:25:26,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:26,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407184376] [2020-10-15 20:25:26,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:26,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:26,370 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:26,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407184376] [2020-10-15 20:25:26,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20196287] [2020-10-15 20:25:26,371 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 [2020-10-15 20:25:26,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 20:25:26,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:26,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:26,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:26,437 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:26,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:26,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 20:25:26,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695782370] [2020-10-15 20:25:26,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:26,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:26,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:26,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:26,438 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 20:25:27,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:27,169 INFO L93 Difference]: Finished difference Result 138 states and 327 transitions. [2020-10-15 20:25:27,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:25:27,170 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 20:25:27,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:27,170 INFO L225 Difference]: With dead ends: 138 [2020-10-15 20:25:27,170 INFO L226 Difference]: Without dead ends: 132 [2020-10-15 20:25:27,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=608, Invalid=1554, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 20:25:27,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-15 20:25:27,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 93. [2020-10-15 20:25:27,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 20:25:27,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 20:25:27,172 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 20:25:27,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:27,173 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 20:25:27,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:27,173 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 20:25:27,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:27,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:27,173 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:27,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:27,374 INFO L429 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:27,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:27,374 INFO L82 PathProgramCache]: Analyzing trace with hash -2104215232, now seen corresponding path program 220 times [2020-10-15 20:25:27,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:27,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215188319] [2020-10-15 20:25:27,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:27,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:27,753 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:27,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215188319] [2020-10-15 20:25:27,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110256744] [2020-10-15 20:25:27,754 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 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 [2020-10-15 20:25:27,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:25:27,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:27,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:27,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:27,826 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:27,839 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:27,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:27,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 20:25:27,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554079139] [2020-10-15 20:25:27,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:25:27,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:27,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:25:27,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:25:27,840 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 20:25:28,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:28,679 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-10-15 20:25:28,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:25:28,680 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 20:25:28,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:28,680 INFO L225 Difference]: With dead ends: 137 [2020-10-15 20:25:28,681 INFO L226 Difference]: Without dead ends: 131 [2020-10-15 20:25:28,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=665, Invalid=1785, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 20:25:28,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-15 20:25:28,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 92. [2020-10-15 20:25:28,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 20:25:28,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 20:25:28,683 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 20:25:28,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:28,683 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 20:25:28,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:25:28,683 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 20:25:28,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:28,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:28,684 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:28,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2020-10-15 20:25:28,884 INFO L429 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:28,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:28,885 INFO L82 PathProgramCache]: Analyzing trace with hash 888962878, now seen corresponding path program 221 times [2020-10-15 20:25:28,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:28,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564874673] [2020-10-15 20:25:28,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:28,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:29,241 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:29,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564874673] [2020-10-15 20:25:29,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798420846] [2020-10-15 20:25:29,242 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 [2020-10-15 20:25:29,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 20:25:29,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:29,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:29,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:29,311 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:29,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:29,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 20:25:29,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261774198] [2020-10-15 20:25:29,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:29,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:29,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:29,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:29,313 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 20:25:30,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:30,118 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-10-15 20:25:30,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:25:30,119 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 20:25:30,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:30,119 INFO L225 Difference]: With dead ends: 134 [2020-10-15 20:25:30,119 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 20:25:30,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=629, Invalid=1723, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 20:25:30,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 20:25:30,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2020-10-15 20:25:30,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 20:25:30,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 20:25:30,122 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 20:25:30,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:30,122 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 20:25:30,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:30,122 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 20:25:30,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:30,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:30,123 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:30,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-10-15 20:25:30,330 INFO L429 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:30,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:30,330 INFO L82 PathProgramCache]: Analyzing trace with hash 78414242, now seen corresponding path program 222 times [2020-10-15 20:25:30,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:30,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312291223] [2020-10-15 20:25:30,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:30,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:30,678 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:30,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312291223] [2020-10-15 20:25:30,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168997515] [2020-10-15 20:25:30,678 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 [2020-10-15 20:25:30,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 20:25:30,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:30,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:30,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:30,758 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:30,772 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:30,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:30,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 20:25:30,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923790605] [2020-10-15 20:25:30,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:25:30,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:30,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:25:30,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:25:30,773 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 20:25:31,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:31,737 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-10-15 20:25:31,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:25:31,737 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 20:25:31,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:31,738 INFO L225 Difference]: With dead ends: 133 [2020-10-15 20:25:31,738 INFO L226 Difference]: Without dead ends: 127 [2020-10-15 20:25:31,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=693, Invalid=1959, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 20:25:31,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-15 20:25:31,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 92. [2020-10-15 20:25:31,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 20:25:31,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 20:25:31,740 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 20:25:31,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:31,741 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 20:25:31,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:25:31,741 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 20:25:31,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:31,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:31,741 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:31,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-10-15 20:25:31,942 INFO L429 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:31,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:31,942 INFO L82 PathProgramCache]: Analyzing trace with hash 130690848, now seen corresponding path program 223 times [2020-10-15 20:25:31,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:31,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489820260] [2020-10-15 20:25:31,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:31,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:32,291 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:32,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489820260] [2020-10-15 20:25:32,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717489503] [2020-10-15 20:25:32,292 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 [2020-10-15 20:25:32,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:32,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:32,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:32,356 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:32,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:32,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 20:25:32,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499056169] [2020-10-15 20:25:32,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:32,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:32,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:32,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:32,357 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 20:25:33,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:33,247 INFO L93 Difference]: Finished difference Result 130 states and 311 transitions. [2020-10-15 20:25:33,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:25:33,248 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 20:25:33,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:33,249 INFO L225 Difference]: With dead ends: 130 [2020-10-15 20:25:33,249 INFO L226 Difference]: Without dead ends: 124 [2020-10-15 20:25:33,249 INFO L677 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 [2020-10-15 20:25:33,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-15 20:25:33,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 93. [2020-10-15 20:25:33,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 20:25:33,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 20:25:33,251 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 20:25:33,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:33,251 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 20:25:33,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:33,251 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 20:25:33,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:33,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:33,252 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:33,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:33,452 INFO L429 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:33,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:33,453 INFO L82 PathProgramCache]: Analyzing trace with hash 2006940292, now seen corresponding path program 224 times [2020-10-15 20:25:33,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:33,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2529436] [2020-10-15 20:25:33,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:33,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:33,793 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:33,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2529436] [2020-10-15 20:25:33,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720362601] [2020-10-15 20:25:33,793 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 [2020-10-15 20:25:33,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:25:33,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:33,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:33,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:33,875 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:33,892 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:33,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:33,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 20:25:33,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709375928] [2020-10-15 20:25:33,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:25:33,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:33,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:25:33,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:25:33,893 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 20:25:34,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:34,956 INFO L93 Difference]: Finished difference Result 129 states and 309 transitions. [2020-10-15 20:25:34,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:25:34,957 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 20:25:34,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:34,958 INFO L225 Difference]: With dead ends: 129 [2020-10-15 20:25:34,958 INFO L226 Difference]: Without dead ends: 123 [2020-10-15 20:25:34,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=737, Invalid=2125, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 20:25:34,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-15 20:25:34,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 92. [2020-10-15 20:25:34,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 20:25:34,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 20:25:34,960 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 20:25:34,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:34,960 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 20:25:34,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:25:34,961 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 20:25:34,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:34,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:34,961 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:35,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-10-15 20:25:35,162 INFO L429 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:35,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:35,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1599705214, now seen corresponding path program 225 times [2020-10-15 20:25:35,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:35,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285806196] [2020-10-15 20:25:35,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:35,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:35,493 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:35,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285806196] [2020-10-15 20:25:35,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017795948] [2020-10-15 20:25:35,493 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 [2020-10-15 20:25:35,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 20:25:35,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:35,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:35,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:35,565 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:35,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:35,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 20:25:35,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391402558] [2020-10-15 20:25:35,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:35,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:35,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:35,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:35,567 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 20:25:36,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:36,537 INFO L93 Difference]: Finished difference Result 126 states and 303 transitions. [2020-10-15 20:25:36,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 20:25:36,538 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 20:25:36,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:36,538 INFO L225 Difference]: With dead ends: 126 [2020-10-15 20:25:36,538 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 20:25:36,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=719, Invalid=2037, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 20:25:36,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 20:25:36,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 93. [2020-10-15 20:25:36,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 20:25:36,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 20:25:36,541 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 20:25:36,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:36,542 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 20:25:36,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:36,542 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 20:25:36,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:36,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:36,542 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:36,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:36,743 INFO L429 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:36,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:36,744 INFO L82 PathProgramCache]: Analyzing trace with hash -614513690, now seen corresponding path program 226 times [2020-10-15 20:25:36,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:36,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542237313] [2020-10-15 20:25:36,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:36,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:37,085 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:37,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542237313] [2020-10-15 20:25:37,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758895478] [2020-10-15 20:25:37,086 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 [2020-10-15 20:25:37,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:25:37,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:37,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:37,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:37,161 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:37,177 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:37,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:37,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 20:25:37,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827610268] [2020-10-15 20:25:37,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:25:37,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:37,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:25:37,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:25:37,179 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 20:25:38,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:38,373 INFO L93 Difference]: Finished difference Result 125 states and 301 transitions. [2020-10-15 20:25:38,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:25:38,374 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 20:25:38,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:38,374 INFO L225 Difference]: With dead ends: 125 [2020-10-15 20:25:38,374 INFO L226 Difference]: Without dead ends: 119 [2020-10-15 20:25:38,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=797, Invalid=2283, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 20:25:38,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-15 20:25:38,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2020-10-15 20:25:38,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 20:25:38,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 20:25:38,376 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 20:25:38,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:38,377 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 20:25:38,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:25:38,377 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 20:25:38,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:38,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:38,377 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:38,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2020-10-15 20:25:38,580 INFO L429 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:38,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:38,580 INFO L82 PathProgramCache]: Analyzing trace with hash 2063294564, now seen corresponding path program 227 times [2020-10-15 20:25:38,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:38,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088333254] [2020-10-15 20:25:38,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:38,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:38,914 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:38,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088333254] [2020-10-15 20:25:38,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717309997] [2020-10-15 20:25:38,915 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 [2020-10-15 20:25:38,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 20:25:38,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:38,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:38,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:38,991 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:38,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:38,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 20:25:38,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339746565] [2020-10-15 20:25:38,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:38,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:38,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:38,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:38,992 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 20:25:40,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:40,047 INFO L93 Difference]: Finished difference Result 122 states and 295 transitions. [2020-10-15 20:25:40,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:25:40,048 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 20:25:40,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:40,048 INFO L225 Difference]: With dead ends: 122 [2020-10-15 20:25:40,049 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 20:25:40,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=788, Invalid=2182, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 20:25:40,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 20:25:40,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2020-10-15 20:25:40,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 20:25:40,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 20:25:40,052 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 20:25:40,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:40,052 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 20:25:40,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:40,052 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 20:25:40,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:40,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:40,052 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:40,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:40,253 INFO L429 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:40,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:40,254 INFO L82 PathProgramCache]: Analyzing trace with hash -974783032, now seen corresponding path program 228 times [2020-10-15 20:25:40,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:40,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783482794] [2020-10-15 20:25:40,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:40,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:40,589 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:40,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783482794] [2020-10-15 20:25:40,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048316239] [2020-10-15 20:25:40,590 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 [2020-10-15 20:25:40,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 20:25:40,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:40,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:40,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:40,668 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:40,687 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:40,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:40,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 20:25:40,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630567368] [2020-10-15 20:25:40,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:25:40,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:40,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:25:40,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:25:40,688 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 20:25:41,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:41,980 INFO L93 Difference]: Finished difference Result 121 states and 293 transitions. [2020-10-15 20:25:41,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 20:25:41,981 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 20:25:41,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:41,981 INFO L225 Difference]: With dead ends: 121 [2020-10-15 20:25:41,981 INFO L226 Difference]: Without dead ends: 115 [2020-10-15 20:25:41,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=873, Invalid=2433, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 20:25:41,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-15 20:25:41,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2020-10-15 20:25:41,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 20:25:41,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 20:25:41,986 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 20:25:41,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:41,986 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 20:25:41,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:25:41,986 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 20:25:41,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:41,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:41,987 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:42,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2020-10-15 20:25:42,189 INFO L429 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:42,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:42,189 INFO L82 PathProgramCache]: Analyzing trace with hash 641409478, now seen corresponding path program 229 times [2020-10-15 20:25:42,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:42,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220687937] [2020-10-15 20:25:42,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:42,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:42,497 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:42,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220687937] [2020-10-15 20:25:42,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493003250] [2020-10-15 20:25:42,498 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 [2020-10-15 20:25:42,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:42,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:42,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:42,566 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:42,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:42,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 20:25:42,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374523222] [2020-10-15 20:25:42,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:42,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:42,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:42,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:42,567 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 20:25:43,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:43,695 INFO L93 Difference]: Finished difference Result 118 states and 287 transitions. [2020-10-15 20:25:43,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 20:25:43,696 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 20:25:43,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:43,697 INFO L225 Difference]: With dead ends: 118 [2020-10-15 20:25:43,697 INFO L226 Difference]: Without dead ends: 112 [2020-10-15 20:25:43,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=873, Invalid=2319, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 20:25:43,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-15 20:25:43,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2020-10-15 20:25:43,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 20:25:43,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 20:25:43,700 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 20:25:43,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:43,700 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 20:25:43,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:43,700 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 20:25:43,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:43,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:43,701 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:43,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:43,901 INFO L429 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:43,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:43,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1161152554, now seen corresponding path program 230 times [2020-10-15 20:25:43,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:43,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238334093] [2020-10-15 20:25:43,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:43,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:44,220 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:44,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238334093] [2020-10-15 20:25:44,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324562075] [2020-10-15 20:25:44,221 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 [2020-10-15 20:25:44,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:25:44,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:44,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:44,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:44,295 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:44,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:44,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 20:25:44,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117671724] [2020-10-15 20:25:44,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:25:44,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:44,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:25:44,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:25:44,315 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 20:25:45,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:45,702 INFO L93 Difference]: Finished difference Result 117 states and 285 transitions. [2020-10-15 20:25:45,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 20:25:45,703 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 20:25:45,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:45,703 INFO L225 Difference]: With dead ends: 117 [2020-10-15 20:25:45,704 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 20:25:45,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=965, Invalid=2575, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 20:25:45,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 20:25:45,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2020-10-15 20:25:45,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 20:25:45,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 20:25:45,706 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 20:25:45,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:45,706 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 20:25:45,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:25:45,706 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 20:25:45,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:45,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:45,707 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:45,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:45,908 INFO L429 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:45,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:45,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1478503512, now seen corresponding path program 231 times [2020-10-15 20:25:45,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:45,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417334199] [2020-10-15 20:25:45,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:45,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:46,217 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:46,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417334199] [2020-10-15 20:25:46,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385668934] [2020-10-15 20:25:46,218 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 [2020-10-15 20:25:46,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 20:25:46,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:46,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:46,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:46,298 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:46,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:46,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 20:25:46,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074915297] [2020-10-15 20:25:46,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:46,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:46,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:46,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:46,299 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 20:25:47,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:47,500 INFO L93 Difference]: Finished difference Result 114 states and 279 transitions. [2020-10-15 20:25:47,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 20:25:47,501 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 20:25:47,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:47,501 INFO L225 Difference]: With dead ends: 114 [2020-10-15 20:25:47,501 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 20:25:47,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=974, Invalid=2448, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 20:25:47,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 20:25:47,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2020-10-15 20:25:47,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 20:25:47,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 20:25:47,504 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 20:25:47,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:47,504 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 20:25:47,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:47,504 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 20:25:47,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:47,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:47,504 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:47,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-10-15 20:25:47,705 INFO L429 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:47,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:47,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1096336140, now seen corresponding path program 232 times [2020-10-15 20:25:47,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:47,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440988575] [2020-10-15 20:25:47,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:47,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:48,028 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:48,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440988575] [2020-10-15 20:25:48,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617765568] [2020-10-15 20:25:48,029 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 [2020-10-15 20:25:48,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:25:48,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:48,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:48,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:48,106 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:48,127 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:48,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:48,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 20:25:48,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918947996] [2020-10-15 20:25:48,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:25:48,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:48,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:25:48,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:25:48,128 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 20:25:49,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:49,655 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-10-15 20:25:49,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 20:25:49,656 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 20:25:49,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:49,656 INFO L225 Difference]: With dead ends: 113 [2020-10-15 20:25:49,656 INFO L226 Difference]: Without dead ends: 107 [2020-10-15 20:25:49,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1073, Invalid=2709, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 20:25:49,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-15 20:25:49,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 92. [2020-10-15 20:25:49,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 20:25:49,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 20:25:49,658 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 20:25:49,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:49,658 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 20:25:49,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:25:49,658 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 20:25:49,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:49,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:49,659 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:49,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-10-15 20:25:49,859 INFO L429 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:49,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:49,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1567331850, now seen corresponding path program 233 times [2020-10-15 20:25:49,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:49,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008483907] [2020-10-15 20:25:49,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:49,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:50,171 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:50,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008483907] [2020-10-15 20:25:50,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428414144] [2020-10-15 20:25:50,172 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 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 [2020-10-15 20:25:50,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 20:25:50,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:50,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:50,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:50,250 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:50,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:50,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 20:25:50,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040345897] [2020-10-15 20:25:50,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:50,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:50,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:50,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:50,251 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 20:25:51,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:51,541 INFO L93 Difference]: Finished difference Result 110 states and 271 transitions. [2020-10-15 20:25:51,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 20:25:51,542 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 20:25:51,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:51,543 INFO L225 Difference]: With dead ends: 110 [2020-10-15 20:25:51,543 INFO L226 Difference]: Without dead ends: 104 [2020-10-15 20:25:51,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1091, Invalid=2569, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 20:25:51,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-15 20:25:51,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2020-10-15 20:25:51,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 20:25:51,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 20:25:51,545 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 20:25:51,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:51,545 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 20:25:51,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:51,545 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 20:25:51,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:51,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:51,546 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:51,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-10-15 20:25:51,747 INFO L429 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:51,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:51,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1583418990, now seen corresponding path program 234 times [2020-10-15 20:25:51,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:51,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32186221] [2020-10-15 20:25:51,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:51,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:52,066 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:52,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32186221] [2020-10-15 20:25:52,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096117686] [2020-10-15 20:25:52,067 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 [2020-10-15 20:25:52,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 20:25:52,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:52,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:52,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:52,149 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:52,169 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:52,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:52,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 20:25:52,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866459577] [2020-10-15 20:25:52,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:25:52,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:52,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:25:52,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:25:52,171 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 20:25:53,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:53,808 INFO L93 Difference]: Finished difference Result 109 states and 269 transitions. [2020-10-15 20:25:53,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 20:25:53,809 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 20:25:53,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:53,809 INFO L225 Difference]: With dead ends: 109 [2020-10-15 20:25:53,810 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 20:25:53,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1197, Invalid=2835, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 20:25:53,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 20:25:53,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 92. [2020-10-15 20:25:53,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 20:25:53,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 20:25:53,812 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 20:25:53,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:53,812 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 20:25:53,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:25:53,813 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 20:25:53,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:53,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:53,813 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:54,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-10-15 20:25:54,014 INFO L429 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:54,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:54,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1583909100, now seen corresponding path program 235 times [2020-10-15 20:25:54,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:54,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575016278] [2020-10-15 20:25:54,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:54,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:54,320 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:54,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575016278] [2020-10-15 20:25:54,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10278145] [2020-10-15 20:25:54,321 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 [2020-10-15 20:25:54,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:54,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:54,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:54,394 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:54,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:54,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 20:25:54,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738883842] [2020-10-15 20:25:54,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:54,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:54,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:54,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:54,395 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 20:25:55,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:55,738 INFO L93 Difference]: Finished difference Result 125 states and 309 transitions. [2020-10-15 20:25:55,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 20:25:55,739 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 20:25:55,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:55,739 INFO L225 Difference]: With dead ends: 125 [2020-10-15 20:25:55,739 INFO L226 Difference]: Without dead ends: 119 [2020-10-15 20:25:55,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1224, Invalid=2682, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 20:25:55,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-15 20:25:55,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 96. [2020-10-15 20:25:55,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-15 20:25:55,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 249 transitions. [2020-10-15 20:25:55,742 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 249 transitions. Word has length 28 [2020-10-15 20:25:55,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:55,742 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 249 transitions. [2020-10-15 20:25:55,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:55,742 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 249 transitions. [2020-10-15 20:25:55,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:55,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:55,743 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:55,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-10-15 20:25:55,944 INFO L429 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:55,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:55,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1583925840, now seen corresponding path program 236 times [2020-10-15 20:25:55,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:55,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95619728] [2020-10-15 20:25:55,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:55,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:56,254 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:56,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95619728] [2020-10-15 20:25:56,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521874185] [2020-10-15 20:25:56,255 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 [2020-10-15 20:25:56,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:25:56,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:56,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:56,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:56,332 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:56,353 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:56,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:56,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 20:25:56,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297678193] [2020-10-15 20:25:56,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:25:56,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:56,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:25:56,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:25:56,354 INFO L87 Difference]: Start difference. First operand 96 states and 249 transitions. Second operand 25 states. [2020-10-15 20:25:58,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:58,002 INFO L93 Difference]: Finished difference Result 106 states and 265 transitions. [2020-10-15 20:25:58,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-15 20:25:58,003 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 20:25:58,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:58,003 INFO L225 Difference]: With dead ends: 106 [2020-10-15 20:25:58,003 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 20:25:58,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1337, Invalid=2953, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 20:25:58,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 20:25:58,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-10-15 20:25:58,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 20:25:58,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 168 transitions. [2020-10-15 20:25:58,005 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 168 transitions. Word has length 28 [2020-10-15 20:25:58,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:58,005 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 168 transitions. [2020-10-15 20:25:58,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:25:58,005 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 168 transitions. [2020-10-15 20:25:58,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:58,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:58,006 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:58,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:58,206 INFO L429 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:58,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:58,207 INFO L82 PathProgramCache]: Analyzing trace with hash 234390510, now seen corresponding path program 237 times [2020-10-15 20:25:58,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:58,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401857379] [2020-10-15 20:25:58,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:58,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:58,527 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:58,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401857379] [2020-10-15 20:25:58,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401990853] [2020-10-15 20:25:58,528 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 [2020-10-15 20:25:58,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 20:25:58,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:58,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:58,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:58,611 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:25:58,638 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:58,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:58,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 20:25:58,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676142535] [2020-10-15 20:25:58,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:25:58,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:58,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:25:58,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:25:58,639 INFO L87 Difference]: Start difference. First operand 69 states and 168 transitions. Second operand 25 states. [2020-10-15 20:26:00,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:00,193 INFO L93 Difference]: Finished difference Result 124 states and 303 transitions. [2020-10-15 20:26:00,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 20:26:00,194 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 20:26:00,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:00,194 INFO L225 Difference]: With dead ends: 124 [2020-10-15 20:26:00,194 INFO L226 Difference]: Without dead ends: 119 [2020-10-15 20:26:00,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1390, Invalid=2900, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 20:26:00,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-15 20:26:00,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 94. [2020-10-15 20:26:00,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 20:26:00,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 241 transitions. [2020-10-15 20:26:00,196 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 241 transitions. Word has length 28 [2020-10-15 20:26:00,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:00,196 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 241 transitions. [2020-10-15 20:26:00,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:26:00,197 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 241 transitions. [2020-10-15 20:26:00,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:00,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:00,197 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:00,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-10-15 20:26:00,398 INFO L429 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:00,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:00,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1857077091, now seen corresponding path program 238 times [2020-10-15 20:26:00,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:00,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411031915] [2020-10-15 20:26:00,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:00,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:00,735 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:00,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411031915] [2020-10-15 20:26:00,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135736776] [2020-10-15 20:26:00,735 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 [2020-10-15 20:26:00,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:26:00,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:00,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:00,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:00,815 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:26:00,844 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:00,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:00,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 20:26:00,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134331117] [2020-10-15 20:26:00,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:26:00,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:00,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:26:00,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:26:00,846 INFO L87 Difference]: Start difference. First operand 94 states and 241 transitions. Second operand 26 states. [2020-10-15 20:26:02,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:02,532 INFO L93 Difference]: Finished difference Result 102 states and 261 transitions. [2020-10-15 20:26:02,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 20:26:02,540 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 20:26:02,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:02,540 INFO L225 Difference]: With dead ends: 102 [2020-10-15 20:26:02,540 INFO L226 Difference]: Without dead ends: 97 [2020-10-15 20:26:02,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1409, Invalid=3013, Unknown=0, NotChecked=0, Total=4422 [2020-10-15 20:26:02,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-15 20:26:02,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2020-10-15 20:26:02,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 20:26:02,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 172 transitions. [2020-10-15 20:26:02,542 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 172 transitions. Word has length 29 [2020-10-15 20:26:02,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:02,542 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 172 transitions. [2020-10-15 20:26:02,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:26:02,543 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 172 transitions. [2020-10-15 20:26:02,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:02,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:02,543 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:02,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:02,744 INFO L429 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:02,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:02,744 INFO L82 PathProgramCache]: Analyzing trace with hash 65865102, now seen corresponding path program 239 times [2020-10-15 20:26:02,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:02,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087308037] [2020-10-15 20:26:02,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:02,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:03,236 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:03,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087308037] [2020-10-15 20:26:03,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171591645] [2020-10-15 20:26:03,237 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 [2020-10-15 20:26:03,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-15 20:26:03,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:03,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:03,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:03,299 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:03,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:03,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 20:26:03,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993268007] [2020-10-15 20:26:03,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:26:03,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:03,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:26:03,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:26:03,301 INFO L87 Difference]: Start difference. First operand 70 states and 172 transitions. Second operand 25 states. [2020-10-15 20:26:04,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:04,003 INFO L93 Difference]: Finished difference Result 108 states and 251 transitions. [2020-10-15 20:26:04,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:26:04,004 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 20:26:04,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:04,004 INFO L225 Difference]: With dead ends: 108 [2020-10-15 20:26:04,004 INFO L226 Difference]: Without dead ends: 102 [2020-10-15 20:26:04,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=663, Invalid=1407, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 20:26:04,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-15 20:26:04,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 78. [2020-10-15 20:26:04,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 20:26:04,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 191 transitions. [2020-10-15 20:26:04,007 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 191 transitions. Word has length 29 [2020-10-15 20:26:04,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:04,007 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 191 transitions. [2020-10-15 20:26:04,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:26:04,008 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 191 transitions. [2020-10-15 20:26:04,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:04,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:04,008 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:04,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:04,216 INFO L429 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:04,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:04,216 INFO L82 PathProgramCache]: Analyzing trace with hash -972903182, now seen corresponding path program 240 times [2020-10-15 20:26:04,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:04,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4366435] [2020-10-15 20:26:04,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:04,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:04,657 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:04,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4366435] [2020-10-15 20:26:04,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146340438] [2020-10-15 20:26:04,658 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 [2020-10-15 20:26:04,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-15 20:26:04,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:04,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:04,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:04,738 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:26:04,749 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:04,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:04,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 20:26:04,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941428980] [2020-10-15 20:26:04,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:26:04,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:04,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:26:04,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:26:04,751 INFO L87 Difference]: Start difference. First operand 78 states and 191 transitions. Second operand 26 states. [2020-10-15 20:26:05,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:05,544 INFO L93 Difference]: Finished difference Result 130 states and 295 transitions. [2020-10-15 20:26:05,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:26:05,545 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 20:26:05,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:05,546 INFO L225 Difference]: With dead ends: 130 [2020-10-15 20:26:05,546 INFO L226 Difference]: Without dead ends: 124 [2020-10-15 20:26:05,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=672, Invalid=1584, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 20:26:05,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-15 20:26:05,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 76. [2020-10-15 20:26:05,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 20:26:05,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 187 transitions. [2020-10-15 20:26:05,548 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 187 transitions. Word has length 29 [2020-10-15 20:26:05,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:05,548 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 187 transitions. [2020-10-15 20:26:05,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:26:05,548 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 187 transitions. [2020-10-15 20:26:05,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:05,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:05,548 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:05,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:05,749 INFO L429 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:05,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:05,750 INFO L82 PathProgramCache]: Analyzing trace with hash -558119952, now seen corresponding path program 241 times [2020-10-15 20:26:05,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:05,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134572398] [2020-10-15 20:26:05,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:05,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:06,177 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:06,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134572398] [2020-10-15 20:26:06,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760980648] [2020-10-15 20:26:06,178 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 [2020-10-15 20:26:06,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:06,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:06,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:06,244 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:06,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:06,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 20:26:06,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34565439] [2020-10-15 20:26:06,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:26:06,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:06,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:26:06,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:26:06,245 INFO L87 Difference]: Start difference. First operand 76 states and 187 transitions. Second operand 25 states. [2020-10-15 20:26:07,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:07,055 INFO L93 Difference]: Finished difference Result 131 states and 299 transitions. [2020-10-15 20:26:07,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:26:07,056 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 20:26:07,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:07,056 INFO L225 Difference]: With dead ends: 131 [2020-10-15 20:26:07,056 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 20:26:07,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=674, Invalid=1678, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 20:26:07,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 20:26:07,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 79. [2020-10-15 20:26:07,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 20:26:07,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 195 transitions. [2020-10-15 20:26:07,058 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 195 transitions. Word has length 29 [2020-10-15 20:26:07,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:07,058 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 195 transitions. [2020-10-15 20:26:07,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:26:07,059 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 195 transitions. [2020-10-15 20:26:07,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:07,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:07,059 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:07,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:07,260 INFO L429 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:07,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:07,260 INFO L82 PathProgramCache]: Analyzing trace with hash 2015097940, now seen corresponding path program 242 times [2020-10-15 20:26:07,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:07,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799140415] [2020-10-15 20:26:07,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:07,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:07,701 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:07,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799140415] [2020-10-15 20:26:07,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286174784] [2020-10-15 20:26:07,701 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 [2020-10-15 20:26:07,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:26:07,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:07,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:07,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:07,778 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:26:07,796 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:07,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:07,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 20:26:07,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153508685] [2020-10-15 20:26:07,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:26:07,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:07,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:26:07,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:26:07,797 INFO L87 Difference]: Start difference. First operand 79 states and 195 transitions. Second operand 26 states. [2020-10-15 20:26:08,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:08,648 INFO L93 Difference]: Finished difference Result 149 states and 335 transitions. [2020-10-15 20:26:08,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:26:08,648 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 20:26:08,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:08,649 INFO L225 Difference]: With dead ends: 149 [2020-10-15 20:26:08,649 INFO L226 Difference]: Without dead ends: 143 [2020-10-15 20:26:08,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=712, Invalid=1838, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 20:26:08,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-15 20:26:08,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 78. [2020-10-15 20:26:08,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 20:26:08,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 193 transitions. [2020-10-15 20:26:08,651 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 193 transitions. Word has length 29 [2020-10-15 20:26:08,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:08,651 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 193 transitions. [2020-10-15 20:26:08,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:26:08,652 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 193 transitions. [2020-10-15 20:26:08,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:08,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:08,652 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:08,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2020-10-15 20:26:08,853 INFO L429 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:08,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:08,854 INFO L82 PathProgramCache]: Analyzing trace with hash 831173330, now seen corresponding path program 243 times [2020-10-15 20:26:08,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:08,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114685560] [2020-10-15 20:26:08,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:08,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:09,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114685560] [2020-10-15 20:26:09,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182986749] [2020-10-15 20:26:09,265 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 [2020-10-15 20:26:09,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-15 20:26:09,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:09,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:09,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:09,334 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:09,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:09,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 20:26:09,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134819865] [2020-10-15 20:26:09,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:26:09,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:09,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:26:09,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:26:09,335 INFO L87 Difference]: Start difference. First operand 78 states and 193 transitions. Second operand 25 states. [2020-10-15 20:26:10,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:10,229 INFO L93 Difference]: Finished difference Result 149 states and 337 transitions. [2020-10-15 20:26:10,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:26:10,230 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 20:26:10,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:10,230 INFO L225 Difference]: With dead ends: 149 [2020-10-15 20:26:10,230 INFO L226 Difference]: Without dead ends: 143 [2020-10-15 20:26:10,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=728, Invalid=1924, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 20:26:10,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-15 20:26:10,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 81. [2020-10-15 20:26:10,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:26:10,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 201 transitions. [2020-10-15 20:26:10,233 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 201 transitions. Word has length 29 [2020-10-15 20:26:10,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:10,233 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 201 transitions. [2020-10-15 20:26:10,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:26:10,233 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 201 transitions. [2020-10-15 20:26:10,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:10,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:10,233 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:10,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2020-10-15 20:26:10,434 INFO L429 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:10,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:10,434 INFO L82 PathProgramCache]: Analyzing trace with hash -716985290, now seen corresponding path program 244 times [2020-10-15 20:26:10,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:10,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436038374] [2020-10-15 20:26:10,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:10,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:10,853 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:10,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436038374] [2020-10-15 20:26:10,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675792985] [2020-10-15 20:26:10,854 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 [2020-10-15 20:26:10,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:26:10,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:10,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:10,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:10,930 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:26:10,951 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:10,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:10,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 20:26:10,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709557117] [2020-10-15 20:26:10,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:26:10,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:10,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:26:10,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:26:10,952 INFO L87 Difference]: Start difference. First operand 81 states and 201 transitions. Second operand 26 states. [2020-10-15 20:26:11,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:11,936 INFO L93 Difference]: Finished difference Result 146 states and 331 transitions. [2020-10-15 20:26:11,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:26:11,937 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 20:26:11,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:11,937 INFO L225 Difference]: With dead ends: 146 [2020-10-15 20:26:11,938 INFO L226 Difference]: Without dead ends: 140 [2020-10-15 20:26:11,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=731, Invalid=2025, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 20:26:11,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-15 20:26:11,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 80. [2020-10-15 20:26:11,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:26:11,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 199 transitions. [2020-10-15 20:26:11,940 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 199 transitions. Word has length 29 [2020-10-15 20:26:11,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:11,940 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 199 transitions. [2020-10-15 20:26:11,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:26:11,940 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 199 transitions. [2020-10-15 20:26:11,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:11,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:11,941 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:12,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-10-15 20:26:12,142 INFO L429 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:12,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:12,143 INFO L82 PathProgramCache]: Analyzing trace with hash -2018774476, now seen corresponding path program 245 times [2020-10-15 20:26:12,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:12,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268521928] [2020-10-15 20:26:12,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:12,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:12,542 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:12,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268521928] [2020-10-15 20:26:12,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041907605] [2020-10-15 20:26:12,543 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 [2020-10-15 20:26:12,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-15 20:26:12,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:12,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:12,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:12,612 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:12,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:12,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 20:26:12,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549744032] [2020-10-15 20:26:12,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:26:12,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:12,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:26:12,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:26:12,613 INFO L87 Difference]: Start difference. First operand 80 states and 199 transitions. Second operand 25 states. [2020-10-15 20:26:13,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:13,563 INFO L93 Difference]: Finished difference Result 147 states and 335 transitions. [2020-10-15 20:26:13,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 20:26:13,564 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 20:26:13,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:13,565 INFO L225 Difference]: With dead ends: 147 [2020-10-15 20:26:13,565 INFO L226 Difference]: Without dead ends: 141 [2020-10-15 20:26:13,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=762, Invalid=2100, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 20:26:13,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-15 20:26:13,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 83. [2020-10-15 20:26:13,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 20:26:13,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 207 transitions. [2020-10-15 20:26:13,566 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 207 transitions. Word has length 29 [2020-10-15 20:26:13,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:13,567 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 207 transitions. [2020-10-15 20:26:13,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:26:13,567 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 207 transitions. [2020-10-15 20:26:13,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:13,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:13,567 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:13,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-10-15 20:26:13,768 INFO L429 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:13,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:13,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1465644184, now seen corresponding path program 246 times [2020-10-15 20:26:13,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:13,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566225805] [2020-10-15 20:26:13,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:13,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:14,174 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:14,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566225805] [2020-10-15 20:26:14,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798470198] [2020-10-15 20:26:14,174 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 [2020-10-15 20:26:14,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-15 20:26:14,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:14,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:14,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:14,272 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:26:14,287 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:14,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:14,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 20:26:14,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628223757] [2020-10-15 20:26:14,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:26:14,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:14,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:26:14,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:26:14,288 INFO L87 Difference]: Start difference. First operand 83 states and 207 transitions. Second operand 26 states. [2020-10-15 20:26:15,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:15,363 INFO L93 Difference]: Finished difference Result 144 states and 329 transitions. [2020-10-15 20:26:15,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:26:15,365 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 20:26:15,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:15,365 INFO L225 Difference]: With dead ends: 144 [2020-10-15 20:26:15,365 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 20:26:15,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=766, Invalid=2204, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 20:26:15,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 20:26:15,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 82. [2020-10-15 20:26:15,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 20:26:15,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 205 transitions. [2020-10-15 20:26:15,368 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 205 transitions. Word has length 29 [2020-10-15 20:26:15,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:15,368 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 205 transitions. [2020-10-15 20:26:15,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:26:15,368 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 205 transitions. [2020-10-15 20:26:15,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:15,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:15,369 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:15,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:15,569 INFO L429 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:15,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:15,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1517920790, now seen corresponding path program 247 times [2020-10-15 20:26:15,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:15,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680598201] [2020-10-15 20:26:15,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:15,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:15,956 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:15,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680598201] [2020-10-15 20:26:15,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970241420] [2020-10-15 20:26:15,956 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 [2020-10-15 20:26:16,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:16,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:16,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:16,028 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:16,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:16,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 20:26:16,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451019783] [2020-10-15 20:26:16,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:26:16,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:16,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:26:16,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:26:16,029 INFO L87 Difference]: Start difference. First operand 82 states and 205 transitions. Second operand 25 states. [2020-10-15 20:26:17,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:17,047 INFO L93 Difference]: Finished difference Result 145 states and 333 transitions. [2020-10-15 20:26:17,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:26:17,048 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 20:26:17,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:17,048 INFO L225 Difference]: With dead ends: 145 [2020-10-15 20:26:17,048 INFO L226 Difference]: Without dead ends: 139 [2020-10-15 20:26:17,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=812, Invalid=2268, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 20:26:17,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-15 20:26:17,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 85. [2020-10-15 20:26:17,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-15 20:26:17,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 213 transitions. [2020-10-15 20:26:17,051 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 213 transitions. Word has length 29 [2020-10-15 20:26:17,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:17,051 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 213 transitions. [2020-10-15 20:26:17,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:26:17,052 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 213 transitions. [2020-10-15 20:26:17,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:17,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:17,052 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:17,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2020-10-15 20:26:17,253 INFO L429 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:17,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:17,253 INFO L82 PathProgramCache]: Analyzing trace with hash -900797062, now seen corresponding path program 248 times [2020-10-15 20:26:17,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:17,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005697638] [2020-10-15 20:26:17,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:17,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:17,658 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:17,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005697638] [2020-10-15 20:26:17,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737600086] [2020-10-15 20:26:17,659 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 [2020-10-15 20:26:17,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:26:17,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:17,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:17,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:17,744 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:26:17,762 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:17,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:17,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 20:26:17,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136114470] [2020-10-15 20:26:17,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:26:17,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:17,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:26:17,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:26:17,763 INFO L87 Difference]: Start difference. First operand 85 states and 213 transitions. Second operand 26 states. [2020-10-15 20:26:18,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:18,965 INFO L93 Difference]: Finished difference Result 142 states and 327 transitions. [2020-10-15 20:26:18,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:26:18,966 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 20:26:18,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:18,967 INFO L225 Difference]: With dead ends: 142 [2020-10-15 20:26:18,967 INFO L226 Difference]: Without dead ends: 136 [2020-10-15 20:26:18,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=817, Invalid=2375, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 20:26:18,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-15 20:26:18,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 84. [2020-10-15 20:26:18,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-15 20:26:18,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 211 transitions. [2020-10-15 20:26:18,969 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 211 transitions. Word has length 29 [2020-10-15 20:26:18,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:18,969 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 211 transitions. [2020-10-15 20:26:18,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:26:18,970 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 211 transitions. [2020-10-15 20:26:18,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:18,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:18,970 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:19,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:19,171 INFO L429 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:19,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:19,171 INFO L82 PathProgramCache]: Analyzing trace with hash -212475272, now seen corresponding path program 249 times [2020-10-15 20:26:19,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:19,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443797750] [2020-10-15 20:26:19,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:19,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:19,548 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:19,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443797750] [2020-10-15 20:26:19,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087469730] [2020-10-15 20:26:19,549 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 [2020-10-15 20:26:19,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-15 20:26:19,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:19,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:19,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:19,626 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:19,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:19,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 20:26:19,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742220519] [2020-10-15 20:26:19,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:26:19,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:19,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:26:19,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:26:19,627 INFO L87 Difference]: Start difference. First operand 84 states and 211 transitions. Second operand 25 states. [2020-10-15 20:26:20,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:20,750 INFO L93 Difference]: Finished difference Result 143 states and 331 transitions. [2020-10-15 20:26:20,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 20:26:20,751 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 20:26:20,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:20,751 INFO L225 Difference]: With dead ends: 143 [2020-10-15 20:26:20,751 INFO L226 Difference]: Without dead ends: 137 [2020-10-15 20:26:20,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=878, Invalid=2428, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 20:26:20,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-15 20:26:20,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 87. [2020-10-15 20:26:20,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:26:20,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 219 transitions. [2020-10-15 20:26:20,754 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 219 transitions. Word has length 29 [2020-10-15 20:26:20,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:20,754 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 219 transitions. [2020-10-15 20:26:20,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:26:20,754 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 219 transitions. [2020-10-15 20:26:20,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:20,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:20,754 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:20,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:20,955 INFO L429 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:20,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:20,956 INFO L82 PathProgramCache]: Analyzing trace with hash 772716252, now seen corresponding path program 250 times [2020-10-15 20:26:20,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:20,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523201789] [2020-10-15 20:26:20,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:20,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:21,329 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:21,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523201789] [2020-10-15 20:26:21,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984334859] [2020-10-15 20:26:21,330 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 [2020-10-15 20:26:21,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:26:21,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:21,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:21,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:21,418 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:26:21,437 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:21,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:21,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 20:26:21,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226260517] [2020-10-15 20:26:21,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:26:21,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:21,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:26:21,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:26:21,438 INFO L87 Difference]: Start difference. First operand 87 states and 219 transitions. Second operand 26 states. [2020-10-15 20:26:22,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:22,754 INFO L93 Difference]: Finished difference Result 140 states and 325 transitions. [2020-10-15 20:26:22,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 20:26:22,755 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 20:26:22,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:22,755 INFO L225 Difference]: With dead ends: 140 [2020-10-15 20:26:22,755 INFO L226 Difference]: Without dead ends: 134 [2020-10-15 20:26:22,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=884, Invalid=2538, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 20:26:22,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-15 20:26:22,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 86. [2020-10-15 20:26:22,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:26:22,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 217 transitions. [2020-10-15 20:26:22,757 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 217 transitions. Word has length 29 [2020-10-15 20:26:22,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:22,757 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 217 transitions. [2020-10-15 20:26:22,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:26:22,757 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 217 transitions. [2020-10-15 20:26:22,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:22,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:22,758 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:22,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:22,959 INFO L429 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:22,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:22,959 INFO L82 PathProgramCache]: Analyzing trace with hash -844442790, now seen corresponding path program 251 times [2020-10-15 20:26:22,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:22,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140161760] [2020-10-15 20:26:22,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:22,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:23,318 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:23,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140161760] [2020-10-15 20:26:23,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445207263] [2020-10-15 20:26:23,319 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 [2020-10-15 20:26:23,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-15 20:26:23,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:23,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:23,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:23,395 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:23,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:23,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 20:26:23,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187965583] [2020-10-15 20:26:23,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:26:23,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:23,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:26:23,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:26:23,396 INFO L87 Difference]: Start difference. First operand 86 states and 217 transitions. Second operand 25 states. [2020-10-15 20:26:24,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:24,580 INFO L93 Difference]: Finished difference Result 141 states and 329 transitions. [2020-10-15 20:26:24,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 20:26:24,581 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 20:26:24,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:24,581 INFO L225 Difference]: With dead ends: 141 [2020-10-15 20:26:24,581 INFO L226 Difference]: Without dead ends: 135 [2020-10-15 20:26:24,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=960, Invalid=2580, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 20:26:24,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-15 20:26:24,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 89. [2020-10-15 20:26:24,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-15 20:26:24,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 225 transitions. [2020-10-15 20:26:24,584 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 225 transitions. Word has length 29 [2020-10-15 20:26:24,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:24,584 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 225 transitions. [2020-10-15 20:26:24,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:26:24,584 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 225 transitions. [2020-10-15 20:26:24,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:24,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:24,585 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:24,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:24,786 INFO L429 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:24,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:24,786 INFO L82 PathProgramCache]: Analyzing trace with hash 412446910, now seen corresponding path program 252 times [2020-10-15 20:26:24,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:24,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096200342] [2020-10-15 20:26:24,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:24,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:25,155 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:25,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096200342] [2020-10-15 20:26:25,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501865446] [2020-10-15 20:26:25,156 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 [2020-10-15 20:26:25,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-15 20:26:25,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:25,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:25,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:25,239 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:26:25,258 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:25,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:25,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 20:26:25,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258551045] [2020-10-15 20:26:25,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:26:25,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:25,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:26:25,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:26:25,259 INFO L87 Difference]: Start difference. First operand 89 states and 225 transitions. Second operand 26 states. [2020-10-15 20:26:26,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:26,681 INFO L93 Difference]: Finished difference Result 138 states and 323 transitions. [2020-10-15 20:26:26,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 20:26:26,682 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 20:26:26,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:26,683 INFO L225 Difference]: With dead ends: 138 [2020-10-15 20:26:26,683 INFO L226 Difference]: Without dead ends: 132 [2020-10-15 20:26:26,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=967, Invalid=2693, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 20:26:26,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-15 20:26:26,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 88. [2020-10-15 20:26:26,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 20:26:26,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 223 transitions. [2020-10-15 20:26:26,686 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 223 transitions. Word has length 29 [2020-10-15 20:26:26,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:26,686 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 223 transitions. [2020-10-15 20:26:26,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:26:26,686 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 223 transitions. [2020-10-15 20:26:26,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:26,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:26,687 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:26,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:26,890 INFO L429 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:26,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:26,890 INFO L82 PathProgramCache]: Analyzing trace with hash 2028639420, now seen corresponding path program 253 times [2020-10-15 20:26:26,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:26,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905025142] [2020-10-15 20:26:26,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:26,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:27,243 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:27,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905025142] [2020-10-15 20:26:27,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018608618] [2020-10-15 20:26:27,244 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 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 [2020-10-15 20:26:27,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:27,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:27,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:27,318 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:27,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:27,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 20:26:27,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604921449] [2020-10-15 20:26:27,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:26:27,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:27,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:26:27,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:26:27,319 INFO L87 Difference]: Start difference. First operand 88 states and 223 transitions. Second operand 25 states. [2020-10-15 20:26:28,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:28,605 INFO L93 Difference]: Finished difference Result 139 states and 327 transitions. [2020-10-15 20:26:28,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 20:26:28,606 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 20:26:28,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:28,607 INFO L225 Difference]: With dead ends: 139 [2020-10-15 20:26:28,607 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 20:26:28,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1058, Invalid=2724, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 20:26:28,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 20:26:28,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 91. [2020-10-15 20:26:28,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 20:26:28,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 231 transitions. [2020-10-15 20:26:28,609 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 231 transitions. Word has length 29 [2020-10-15 20:26:28,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:28,609 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 231 transitions. [2020-10-15 20:26:28,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:26:28,610 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 231 transitions. [2020-10-15 20:26:28,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:28,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:28,610 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:28,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2020-10-15 20:26:28,816 INFO L429 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:28,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:28,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1746584800, now seen corresponding path program 254 times [2020-10-15 20:26:28,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:28,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84177491] [2020-10-15 20:26:28,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:29,178 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:29,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84177491] [2020-10-15 20:26:29,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316158330] [2020-10-15 20:26:29,179 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 [2020-10-15 20:26:29,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:26:29,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:29,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:29,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:29,262 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:26:29,283 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:29,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:29,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 20:26:29,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489998814] [2020-10-15 20:26:29,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:26:29,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:29,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:26:29,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:26:29,284 INFO L87 Difference]: Start difference. First operand 91 states and 231 transitions. Second operand 26 states. [2020-10-15 20:26:30,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:30,820 INFO L93 Difference]: Finished difference Result 136 states and 321 transitions. [2020-10-15 20:26:30,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 20:26:30,822 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 20:26:30,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:30,822 INFO L225 Difference]: With dead ends: 136 [2020-10-15 20:26:30,823 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 20:26:30,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1066, Invalid=2840, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 20:26:30,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 20:26:30,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 90. [2020-10-15 20:26:30,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-15 20:26:30,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 229 transitions. [2020-10-15 20:26:30,826 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 229 transitions. Word has length 29 [2020-10-15 20:26:30,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:30,826 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 229 transitions. [2020-10-15 20:26:30,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:26:30,826 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 229 transitions. [2020-10-15 20:26:30,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:30,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:30,827 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:31,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2020-10-15 20:26:31,031 INFO L429 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:31,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:31,032 INFO L82 PathProgramCache]: Analyzing trace with hash -91273570, now seen corresponding path program 255 times [2020-10-15 20:26:31,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:31,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29163746] [2020-10-15 20:26:31,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:31,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:31,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29163746] [2020-10-15 20:26:31,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893381287] [2020-10-15 20:26:31,387 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 [2020-10-15 20:26:31,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-15 20:26:31,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:31,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:31,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:31,474 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:31,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:31,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 20:26:31,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481612187] [2020-10-15 20:26:31,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:26:31,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:31,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:26:31,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:26:31,475 INFO L87 Difference]: Start difference. First operand 90 states and 229 transitions. Second operand 25 states. [2020-10-15 20:26:32,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:32,842 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-10-15 20:26:32,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 20:26:32,843 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 20:26:32,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:32,844 INFO L225 Difference]: With dead ends: 137 [2020-10-15 20:26:32,844 INFO L226 Difference]: Without dead ends: 131 [2020-10-15 20:26:32,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1172, Invalid=2860, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 20:26:32,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-15 20:26:32,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2020-10-15 20:26:32,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 20:26:32,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 20:26:32,846 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 29 [2020-10-15 20:26:32,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:32,847 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 20:26:32,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:26:32,847 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 20:26:32,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:32,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:32,847 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:33,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2020-10-15 20:26:33,048 INFO L429 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:33,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:33,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1811401214, now seen corresponding path program 256 times [2020-10-15 20:26:33,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:33,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163439381] [2020-10-15 20:26:33,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:33,406 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:33,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163439381] [2020-10-15 20:26:33,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115357240] [2020-10-15 20:26:33,406 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 [2020-10-15 20:26:33,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:26:33,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:33,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:33,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:33,498 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:26:33,519 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:33,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:33,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 20:26:33,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931925385] [2020-10-15 20:26:33,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:26:33,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:33,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:26:33,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:26:33,520 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 26 states. [2020-10-15 20:26:35,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:35,166 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-10-15 20:26:35,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 20:26:35,167 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 20:26:35,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:35,168 INFO L225 Difference]: With dead ends: 134 [2020-10-15 20:26:35,168 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 20:26:35,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1181, Invalid=2979, Unknown=0, NotChecked=0, Total=4160 [2020-10-15 20:26:35,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 20:26:35,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 92. [2020-10-15 20:26:35,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 20:26:35,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 20:26:35,170 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 29 [2020-10-15 20:26:35,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:35,171 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 20:26:35,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:26:35,171 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 20:26:35,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:35,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:35,171 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:35,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable257,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:35,372 INFO L429 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:35,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:35,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1340405504, now seen corresponding path program 257 times [2020-10-15 20:26:35,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:35,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447278053] [2020-10-15 20:26:35,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:35,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:35,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447278053] [2020-10-15 20:26:35,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053637712] [2020-10-15 20:26:35,727 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 [2020-10-15 20:26:35,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-15 20:26:35,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:35,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:35,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:35,809 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:35,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:35,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 20:26:35,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201302708] [2020-10-15 20:26:35,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:26:35,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:35,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:26:35,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:26:35,811 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 25 states. [2020-10-15 20:26:37,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:37,244 INFO L93 Difference]: Finished difference Result 135 states and 323 transitions. [2020-10-15 20:26:37,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-15 20:26:37,245 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 20:26:37,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:37,245 INFO L225 Difference]: With dead ends: 135 [2020-10-15 20:26:37,245 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 20:26:37,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1302, Invalid=2988, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 20:26:37,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 20:26:37,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 95. [2020-10-15 20:26:37,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-15 20:26:37,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 243 transitions. [2020-10-15 20:26:37,248 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 243 transitions. Word has length 29 [2020-10-15 20:26:37,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:37,249 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 243 transitions. [2020-10-15 20:26:37,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:26:37,249 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 243 transitions. [2020-10-15 20:26:37,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:37,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:37,249 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:37,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2020-10-15 20:26:37,450 INFO L429 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:37,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:37,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1324318364, now seen corresponding path program 258 times [2020-10-15 20:26:37,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:37,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585638061] [2020-10-15 20:26:37,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:37,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:37,808 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:37,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585638061] [2020-10-15 20:26:37,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54934032] [2020-10-15 20:26:37,808 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 [2020-10-15 20:26:37,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-15 20:26:37,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:37,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:37,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:37,904 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:26:37,927 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:37,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:37,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 20:26:37,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337707854] [2020-10-15 20:26:37,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:26:37,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:37,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:26:37,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:26:37,929 INFO L87 Difference]: Start difference. First operand 95 states and 243 transitions. Second operand 26 states. [2020-10-15 20:26:39,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:39,694 INFO L93 Difference]: Finished difference Result 132 states and 317 transitions. [2020-10-15 20:26:39,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-15 20:26:39,695 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 20:26:39,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:39,695 INFO L225 Difference]: With dead ends: 132 [2020-10-15 20:26:39,695 INFO L226 Difference]: Without dead ends: 126 [2020-10-15 20:26:39,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1312, Invalid=3110, Unknown=0, NotChecked=0, Total=4422 [2020-10-15 20:26:39,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-15 20:26:39,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 94. [2020-10-15 20:26:39,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 20:26:39,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 241 transitions. [2020-10-15 20:26:39,697 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 241 transitions. Word has length 29 [2020-10-15 20:26:39,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:39,698 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 241 transitions. [2020-10-15 20:26:39,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:26:39,698 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 241 transitions. [2020-10-15 20:26:39,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:39,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:39,699 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:39,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:39,907 INFO L429 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:39,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:39,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1323828254, now seen corresponding path program 259 times [2020-10-15 20:26:39,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:39,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436374907] [2020-10-15 20:26:39,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:39,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:40,258 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:40,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436374907] [2020-10-15 20:26:40,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442478388] [2020-10-15 20:26:40,259 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 [2020-10-15 20:26:40,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:40,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:40,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:40,345 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:40,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:40,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 20:26:40,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192675750] [2020-10-15 20:26:40,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:26:40,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:40,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:26:40,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:26:40,347 INFO L87 Difference]: Start difference. First operand 94 states and 241 transitions. Second operand 25 states. [2020-10-15 20:26:41,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:41,860 INFO L93 Difference]: Finished difference Result 152 states and 367 transitions. [2020-10-15 20:26:41,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 20:26:41,861 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 20:26:41,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:41,861 INFO L225 Difference]: With dead ends: 152 [2020-10-15 20:26:41,861 INFO L226 Difference]: Without dead ends: 146 [2020-10-15 20:26:41,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1448, Invalid=3108, Unknown=0, NotChecked=0, Total=4556 [2020-10-15 20:26:41,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-15 20:26:41,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2020-10-15 20:26:41,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-15 20:26:41,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 261 transitions. [2020-10-15 20:26:41,864 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 261 transitions. Word has length 29 [2020-10-15 20:26:41,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:41,865 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 261 transitions. [2020-10-15 20:26:41,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:26:41,865 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 261 transitions. [2020-10-15 20:26:41,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:41,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:41,865 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:42,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2020-10-15 20:26:42,068 INFO L429 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:42,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:42,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1323811514, now seen corresponding path program 260 times [2020-10-15 20:26:42,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:42,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69433085] [2020-10-15 20:26:42,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:42,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:42,428 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:42,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69433085] [2020-10-15 20:26:42,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299143761] [2020-10-15 20:26:42,429 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 [2020-10-15 20:26:42,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:26:42,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:42,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:42,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:42,513 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:26:42,537 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:42,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:42,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 20:26:42,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081478428] [2020-10-15 20:26:42,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:26:42,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:42,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:26:42,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:26:42,539 INFO L87 Difference]: Start difference. First operand 100 states and 261 transitions. Second operand 26 states. [2020-10-15 20:26:44,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:44,329 INFO L93 Difference]: Finished difference Result 133 states and 323 transitions. [2020-10-15 20:26:44,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-15 20:26:44,331 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 20:26:44,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:44,331 INFO L225 Difference]: With dead ends: 133 [2020-10-15 20:26:44,331 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 20:26:44,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1459, Invalid=3233, Unknown=0, NotChecked=0, Total=4692 [2020-10-15 20:26:44,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 20:26:44,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 97. [2020-10-15 20:26:44,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-15 20:26:44,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 249 transitions. [2020-10-15 20:26:44,333 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 249 transitions. Word has length 29 [2020-10-15 20:26:44,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:44,334 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 249 transitions. [2020-10-15 20:26:44,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:26:44,334 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 249 transitions. [2020-10-15 20:26:44,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:26:44,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:44,334 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:44,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:44,535 INFO L429 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:44,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:44,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1170458439, now seen corresponding path program 261 times [2020-10-15 20:26:44,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:44,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136183967] [2020-10-15 20:26:44,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:44,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:45,038 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:45,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136183967] [2020-10-15 20:26:45,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900879162] [2020-10-15 20:26:45,039 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 [2020-10-15 20:26:45,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-15 20:26:45,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:45,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:26:45,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:45,111 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:45,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:45,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 20:26:45,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763709860] [2020-10-15 20:26:45,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:26:45,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:45,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:26:45,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:26:45,112 INFO L87 Difference]: Start difference. First operand 97 states and 249 transitions. Second operand 26 states. [2020-10-15 20:26:45,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:45,959 INFO L93 Difference]: Finished difference Result 154 states and 363 transitions. [2020-10-15 20:26:45,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:26:45,960 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 20:26:45,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:45,961 INFO L225 Difference]: With dead ends: 154 [2020-10-15 20:26:45,961 INFO L226 Difference]: Without dead ends: 148 [2020-10-15 20:26:45,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=717, Invalid=1635, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 20:26:45,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-15 20:26:45,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 99. [2020-10-15 20:26:45,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 20:26:45,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 20:26:45,964 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 20:26:45,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:45,964 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 20:26:45,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:26:45,964 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 20:26:45,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:26:45,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:45,964 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:46,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:46,165 INFO L429 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:46,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:46,166 INFO L82 PathProgramCache]: Analyzing trace with hash 2085740573, now seen corresponding path program 262 times [2020-10-15 20:26:46,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:46,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890404258] [2020-10-15 20:26:46,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:46,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:46,661 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:46,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890404258] [2020-10-15 20:26:46,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653329163] [2020-10-15 20:26:46,662 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 [2020-10-15 20:26:46,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:26:46,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:46,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:26:46,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:46,748 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:26:46,763 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:46,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:46,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 20:26:46,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465027154] [2020-10-15 20:26:46,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:26:46,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:46,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:26:46,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:26:46,764 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 20:26:47,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:47,728 INFO L93 Difference]: Finished difference Result 151 states and 357 transitions. [2020-10-15 20:26:47,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:26:47,729 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 20:26:47,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:47,730 INFO L225 Difference]: With dead ends: 151 [2020-10-15 20:26:47,730 INFO L226 Difference]: Without dead ends: 145 [2020-10-15 20:26:47,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=770, Invalid=1882, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 20:26:47,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-15 20:26:47,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 98. [2020-10-15 20:26:47,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 20:26:47,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 20:26:47,733 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 20:26:47,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:47,733 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 20:26:47,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:26:47,733 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 20:26:47,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:26:47,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:47,734 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:47,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:47,934 INFO L429 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:47,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:47,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1794443493, now seen corresponding path program 263 times [2020-10-15 20:26:47,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:47,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545992129] [2020-10-15 20:26:47,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:48,410 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:48,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545992129] [2020-10-15 20:26:48,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822609216] [2020-10-15 20:26:48,410 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 [2020-10-15 20:26:48,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-15 20:26:48,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:48,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:26:48,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:48,477 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:48,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:48,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 20:26:48,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354284387] [2020-10-15 20:26:48,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:26:48,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:48,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:26:48,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:26:48,478 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 20:26:49,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:49,430 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-10-15 20:26:49,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:26:49,431 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 20:26:49,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:49,431 INFO L225 Difference]: With dead ends: 148 [2020-10-15 20:26:49,431 INFO L226 Difference]: Without dead ends: 142 [2020-10-15 20:26:49,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=720, Invalid=1830, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 20:26:49,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-15 20:26:49,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 99. [2020-10-15 20:26:49,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 20:26:49,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 20:26:49,434 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 20:26:49,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:49,434 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 20:26:49,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:26:49,434 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 20:26:49,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:26:49,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:49,434 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:49,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:49,635 INFO L429 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:49,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:49,636 INFO L82 PathProgramCache]: Analyzing trace with hash 778774399, now seen corresponding path program 264 times [2020-10-15 20:26:49,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:49,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525785462] [2020-10-15 20:26:49,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:49,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:50,120 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:50,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525785462] [2020-10-15 20:26:50,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740839918] [2020-10-15 20:26:50,121 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 [2020-10-15 20:26:50,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-15 20:26:50,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:50,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:26:50,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:50,211 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:26:50,227 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:50,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:50,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 20:26:50,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644167332] [2020-10-15 20:26:50,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:26:50,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:50,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:26:50,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:26:50,228 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 20:26:51,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:51,309 INFO L93 Difference]: Finished difference Result 147 states and 349 transitions. [2020-10-15 20:26:51,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:26:51,310 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 20:26:51,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:51,310 INFO L225 Difference]: With dead ends: 147 [2020-10-15 20:26:51,310 INFO L226 Difference]: Without dead ends: 141 [2020-10-15 20:26:51,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=780, Invalid=2082, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 20:26:51,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-15 20:26:51,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 98. [2020-10-15 20:26:51,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 20:26:51,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 20:26:51,313 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 20:26:51,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:51,313 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 20:26:51,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:26:51,313 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 20:26:51,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:26:51,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:51,314 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:51,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:51,514 INFO L429 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:51,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:51,515 INFO L82 PathProgramCache]: Analyzing trace with hash -405150211, now seen corresponding path program 265 times [2020-10-15 20:26:51,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:51,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679637406] [2020-10-15 20:26:51,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:51,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:51,975 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:51,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679637406] [2020-10-15 20:26:51,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188281261] [2020-10-15 20:26:51,976 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 [2020-10-15 20:26:52,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:52,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:26:52,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:52,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:52,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 20:26:52,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37309868] [2020-10-15 20:26:52,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:26:52,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:52,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:26:52,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:26:52,048 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 20:26:53,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:53,057 INFO L93 Difference]: Finished difference Result 144 states and 343 transitions. [2020-10-15 20:26:53,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:26:53,058 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 20:26:53,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:53,058 INFO L225 Difference]: With dead ends: 144 [2020-10-15 20:26:53,058 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 20:26:53,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=739, Invalid=2017, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 20:26:53,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 20:26:53,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 99. [2020-10-15 20:26:53,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 20:26:53,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 20:26:53,061 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 20:26:53,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:53,061 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 20:26:53,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:26:53,061 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 20:26:53,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:26:53,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:53,062 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:53,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2020-10-15 20:26:53,262 INFO L429 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:53,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:53,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1953308831, now seen corresponding path program 266 times [2020-10-15 20:26:53,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:53,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205249068] [2020-10-15 20:26:53,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:53,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:53,732 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:53,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205249068] [2020-10-15 20:26:53,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909274727] [2020-10-15 20:26:53,732 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 [2020-10-15 20:26:53,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:26:53,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:53,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:26:53,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:53,811 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:26:53,827 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:53,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:53,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 20:26:53,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342937138] [2020-10-15 20:26:53,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:26:53,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:53,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:26:53,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:26:53,829 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 20:26:55,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:55,028 INFO L93 Difference]: Finished difference Result 143 states and 341 transitions. [2020-10-15 20:26:55,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:26:55,029 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 20:26:55,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:55,030 INFO L225 Difference]: With dead ends: 143 [2020-10-15 20:26:55,030 INFO L226 Difference]: Without dead ends: 137 [2020-10-15 20:26:55,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=806, Invalid=2274, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 20:26:55,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-15 20:26:55,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 98. [2020-10-15 20:26:55,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 20:26:55,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 20:26:55,032 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 20:26:55,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:55,033 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 20:26:55,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:26:55,033 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 20:26:55,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:26:55,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:55,033 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:55,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2020-10-15 20:26:55,234 INFO L429 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:55,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:55,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1039869279, now seen corresponding path program 267 times [2020-10-15 20:26:55,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:55,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807396721] [2020-10-15 20:26:55,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:55,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:55,676 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:55,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807396721] [2020-10-15 20:26:55,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847857294] [2020-10-15 20:26:55,676 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 [2020-10-15 20:26:55,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-15 20:26:55,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:55,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:26:55,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:55,753 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:55,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:55,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 20:26:55,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189654839] [2020-10-15 20:26:55,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:26:55,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:55,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:26:55,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:26:55,754 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 20:26:56,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:56,849 INFO L93 Difference]: Finished difference Result 140 states and 335 transitions. [2020-10-15 20:26:56,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 20:26:56,850 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 20:26:56,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:56,850 INFO L225 Difference]: With dead ends: 140 [2020-10-15 20:26:56,850 INFO L226 Difference]: Without dead ends: 134 [2020-10-15 20:26:56,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=774, Invalid=2196, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 20:26:56,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-15 20:26:56,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 99. [2020-10-15 20:26:56,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 20:26:56,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 20:26:56,853 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 20:26:56,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:56,853 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 20:26:56,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:26:56,853 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 20:26:56,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:26:56,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:56,854 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:57,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2020-10-15 20:26:57,054 INFO L429 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:57,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:57,055 INFO L82 PathProgramCache]: Analyzing trace with hash 229320643, now seen corresponding path program 268 times [2020-10-15 20:26:57,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:57,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719628651] [2020-10-15 20:26:57,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:57,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:57,503 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:57,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719628651] [2020-10-15 20:26:57,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530483825] [2020-10-15 20:26:57,504 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 [2020-10-15 20:26:57,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:26:57,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:57,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:26:57,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:57,589 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:26:57,607 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:57,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:57,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 20:26:57,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725640154] [2020-10-15 20:26:57,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:26:57,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:57,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:26:57,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:26:57,608 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 20:26:58,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:58,916 INFO L93 Difference]: Finished difference Result 139 states and 333 transitions. [2020-10-15 20:26:58,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:26:58,917 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 20:26:58,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:58,918 INFO L225 Difference]: With dead ends: 139 [2020-10-15 20:26:58,918 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 20:26:58,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=848, Invalid=2458, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 20:26:58,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 20:26:58,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 98. [2020-10-15 20:26:58,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 20:26:58,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 20:26:58,921 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 20:26:58,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:58,921 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 20:26:58,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:26:58,921 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 20:26:58,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:26:58,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:58,922 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:59,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2020-10-15 20:26:59,122 INFO L429 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:59,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:59,123 INFO L82 PathProgramCache]: Analyzing trace with hash 281597249, now seen corresponding path program 269 times [2020-10-15 20:26:59,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:59,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958542050] [2020-10-15 20:26:59,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:59,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:59,548 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:59,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958542050] [2020-10-15 20:26:59,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195547401] [2020-10-15 20:26:59,549 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 [2020-10-15 20:26:59,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-15 20:26:59,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:59,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:26:59,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:59,623 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:59,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:59,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 20:26:59,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41862713] [2020-10-15 20:26:59,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:26:59,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:59,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:26:59,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:26:59,624 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 20:27:00,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:00,795 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-10-15 20:27:00,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:27:00,796 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 20:27:00,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:00,796 INFO L225 Difference]: With dead ends: 136 [2020-10-15 20:27:00,797 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 20:27:00,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=825, Invalid=2367, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 20:27:00,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 20:27:00,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 99. [2020-10-15 20:27:00,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 20:27:00,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 20:27:00,799 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 20:27:00,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:00,799 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 20:27:00,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:27:00,799 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 20:27:00,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:27:00,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:00,800 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:01,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:01,001 INFO L429 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:01,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:01,001 INFO L82 PathProgramCache]: Analyzing trace with hash -2137120603, now seen corresponding path program 270 times [2020-10-15 20:27:01,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:01,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482142313] [2020-10-15 20:27:01,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:01,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:01,444 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:01,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482142313] [2020-10-15 20:27:01,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617239794] [2020-10-15 20:27:01,445 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 [2020-10-15 20:27:01,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-15 20:27:01,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:01,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:27:01,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:01,532 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:27:01,551 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:01,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:01,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 20:27:01,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178892417] [2020-10-15 20:27:01,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:27:01,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:01,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:27:01,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:27:01,552 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 20:27:02,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:02,984 INFO L93 Difference]: Finished difference Result 135 states and 325 transitions. [2020-10-15 20:27:02,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 20:27:02,985 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 20:27:02,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:02,985 INFO L225 Difference]: With dead ends: 135 [2020-10-15 20:27:02,985 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 20:27:02,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=906, Invalid=2634, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 20:27:02,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 20:27:02,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 98. [2020-10-15 20:27:02,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 20:27:02,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 20:27:02,988 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 20:27:02,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:02,988 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 20:27:02,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:27:02,988 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 20:27:02,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:27:02,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:02,989 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:03,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2020-10-15 20:27:03,190 INFO L429 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:03,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:03,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1448798813, now seen corresponding path program 271 times [2020-10-15 20:27:03,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:03,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580393115] [2020-10-15 20:27:03,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:03,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:03,615 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:03,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580393115] [2020-10-15 20:27:03,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303305121] [2020-10-15 20:27:03,615 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 [2020-10-15 20:27:03,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:03,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:27:03,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:03,687 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:03,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:03,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 20:27:03,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621190342] [2020-10-15 20:27:03,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:27:03,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:03,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:27:03,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:27:03,688 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 20:27:04,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:04,955 INFO L93 Difference]: Finished difference Result 132 states and 319 transitions. [2020-10-15 20:27:04,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 20:27:04,956 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 20:27:04,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:04,957 INFO L225 Difference]: With dead ends: 132 [2020-10-15 20:27:04,957 INFO L226 Difference]: Without dead ends: 126 [2020-10-15 20:27:04,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=892, Invalid=2530, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 20:27:04,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-15 20:27:04,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 99. [2020-10-15 20:27:04,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 20:27:04,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 20:27:04,959 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 20:27:04,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:04,959 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 20:27:04,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:27:04,960 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 20:27:04,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:27:04,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:04,960 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:05,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:05,161 INFO L429 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:05,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:05,161 INFO L82 PathProgramCache]: Analyzing trace with hash -463607289, now seen corresponding path program 272 times [2020-10-15 20:27:05,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:05,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453710319] [2020-10-15 20:27:05,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:05,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:05,583 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:05,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453710319] [2020-10-15 20:27:05,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159940957] [2020-10-15 20:27:05,584 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 [2020-10-15 20:27:05,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:27:05,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:05,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:27:05,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:05,666 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:27:05,685 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:05,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:05,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 20:27:05,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762454629] [2020-10-15 20:27:05,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:27:05,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:05,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:27:05,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:27:05,686 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 20:27:07,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:07,237 INFO L93 Difference]: Finished difference Result 131 states and 317 transitions. [2020-10-15 20:27:07,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 20:27:07,238 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 20:27:07,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:07,238 INFO L225 Difference]: With dead ends: 131 [2020-10-15 20:27:07,239 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 20:27:07,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=980, Invalid=2802, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 20:27:07,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 20:27:07,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 98. [2020-10-15 20:27:07,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 20:27:07,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 20:27:07,241 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 20:27:07,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:07,241 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 20:27:07,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:27:07,242 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 20:27:07,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:27:07,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:07,242 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:07,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:07,443 INFO L429 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:07,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:07,444 INFO L82 PathProgramCache]: Analyzing trace with hash -2080766331, now seen corresponding path program 273 times [2020-10-15 20:27:07,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:07,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106588926] [2020-10-15 20:27:07,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:07,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:07,848 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:07,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106588926] [2020-10-15 20:27:07,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623858417] [2020-10-15 20:27:07,848 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 [2020-10-15 20:27:07,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-15 20:27:07,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:07,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:27:07,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:07,934 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:07,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:07,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 20:27:07,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577560082] [2020-10-15 20:27:07,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:27:07,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:07,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:27:07,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:27:07,935 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 20:27:09,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:09,315 INFO L93 Difference]: Finished difference Result 128 states and 311 transitions. [2020-10-15 20:27:09,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 20:27:09,316 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 20:27:09,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:09,317 INFO L225 Difference]: With dead ends: 128 [2020-10-15 20:27:09,317 INFO L226 Difference]: Without dead ends: 122 [2020-10-15 20:27:09,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=975, Invalid=2685, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 20:27:09,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-15 20:27:09,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 99. [2020-10-15 20:27:09,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 20:27:09,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 20:27:09,319 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 20:27:09,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:09,320 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 20:27:09,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:27:09,320 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 20:27:09,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:27:09,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:09,320 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:09,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:09,522 INFO L429 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:09,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:09,523 INFO L82 PathProgramCache]: Analyzing trace with hash -823876631, now seen corresponding path program 274 times [2020-10-15 20:27:09,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:09,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63988476] [2020-10-15 20:27:09,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:09,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:09,933 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:09,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63988476] [2020-10-15 20:27:09,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990607444] [2020-10-15 20:27:09,934 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 [2020-10-15 20:27:09,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:27:09,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:09,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:27:09,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:10,013 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:27:10,035 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:10,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:10,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 20:27:10,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60682882] [2020-10-15 20:27:10,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:27:10,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:10,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:27:10,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:27:10,037 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 20:27:11,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:11,725 INFO L93 Difference]: Finished difference Result 127 states and 309 transitions. [2020-10-15 20:27:11,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 20:27:11,726 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 20:27:11,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:11,727 INFO L225 Difference]: With dead ends: 127 [2020-10-15 20:27:11,727 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 20:27:11,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1070, Invalid=2962, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 20:27:11,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 20:27:11,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 98. [2020-10-15 20:27:11,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 20:27:11,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 20:27:11,729 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 20:27:11,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:11,729 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 20:27:11,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:27:11,729 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 20:27:11,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:27:11,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:11,730 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:11,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:11,930 INFO L429 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:11,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:11,931 INFO L82 PathProgramCache]: Analyzing trace with hash 792315879, now seen corresponding path program 275 times [2020-10-15 20:27:11,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:11,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262957081] [2020-10-15 20:27:11,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:11,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:12,335 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:12,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262957081] [2020-10-15 20:27:12,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160177424] [2020-10-15 20:27:12,336 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 [2020-10-15 20:27:12,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-15 20:27:12,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:12,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:27:12,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:12,421 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:12,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:12,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 20:27:12,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883946533] [2020-10-15 20:27:12,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:27:12,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:12,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:27:12,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:27:12,422 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 20:27:13,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:13,873 INFO L93 Difference]: Finished difference Result 124 states and 303 transitions. [2020-10-15 20:27:13,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 20:27:13,874 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 20:27:13,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:13,875 INFO L225 Difference]: With dead ends: 124 [2020-10-15 20:27:13,875 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 20:27:13,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1074, Invalid=2832, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 20:27:13,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 20:27:13,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 99. [2020-10-15 20:27:13,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 20:27:13,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 20:27:13,878 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 20:27:13,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:13,878 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 20:27:13,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:27:13,878 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 20:27:13,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:27:13,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:13,879 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:14,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2020-10-15 20:27:14,079 INFO L429 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:14,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:14,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1312058955, now seen corresponding path program 276 times [2020-10-15 20:27:14,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:14,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132543173] [2020-10-15 20:27:14,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:14,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:14,486 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:14,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132543173] [2020-10-15 20:27:14,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742893761] [2020-10-15 20:27:14,487 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 [2020-10-15 20:27:14,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-15 20:27:14,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:14,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:27:14,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:14,583 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:27:14,605 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:14,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:14,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 20:27:14,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694182511] [2020-10-15 20:27:14,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:27:14,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:14,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:27:14,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:27:14,606 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 20:27:16,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:16,415 INFO L93 Difference]: Finished difference Result 123 states and 301 transitions. [2020-10-15 20:27:16,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 20:27:16,416 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 20:27:16,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:16,416 INFO L225 Difference]: With dead ends: 123 [2020-10-15 20:27:16,416 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 20:27:16,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1176, Invalid=3114, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 20:27:16,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 20:27:16,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-10-15 20:27:16,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 20:27:16,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 20:27:16,419 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 20:27:16,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:16,419 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 20:27:16,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:27:16,419 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 20:27:16,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:27:16,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:16,419 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:16,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2020-10-15 20:27:16,620 INFO L429 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:16,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:16,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1327597111, now seen corresponding path program 277 times [2020-10-15 20:27:16,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:16,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559075437] [2020-10-15 20:27:16,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:16,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:17,029 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:17,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559075437] [2020-10-15 20:27:17,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329609351] [2020-10-15 20:27:17,030 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 [2020-10-15 20:27:17,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:17,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:27:17,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:17,128 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:17,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:17,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 20:27:17,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496990827] [2020-10-15 20:27:17,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:27:17,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:17,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:27:17,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:27:17,129 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 20:27:18,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:18,670 INFO L93 Difference]: Finished difference Result 120 states and 295 transitions. [2020-10-15 20:27:18,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 20:27:18,671 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 20:27:18,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:18,671 INFO L225 Difference]: With dead ends: 120 [2020-10-15 20:27:18,671 INFO L226 Difference]: Without dead ends: 114 [2020-10-15 20:27:18,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1189, Invalid=2971, Unknown=0, NotChecked=0, Total=4160 [2020-10-15 20:27:18,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-15 20:27:18,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 99. [2020-10-15 20:27:18,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 20:27:18,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 20:27:18,674 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 20:27:18,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:18,674 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 20:27:18,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:27:18,674 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 20:27:18,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:27:18,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:18,674 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:18,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2020-10-15 20:27:18,875 INFO L429 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:18,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:18,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1247242541, now seen corresponding path program 278 times [2020-10-15 20:27:18,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:18,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175027687] [2020-10-15 20:27:18,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:18,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:19,280 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:19,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175027687] [2020-10-15 20:27:19,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120005246] [2020-10-15 20:27:19,281 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 [2020-10-15 20:27:19,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:27:19,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:19,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:27:19,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:19,364 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:27:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:19,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:19,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 20:27:19,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092038943] [2020-10-15 20:27:19,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:27:19,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:19,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:27:19,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:27:19,396 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 20:27:21,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:21,349 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-10-15 20:27:21,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-15 20:27:21,350 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 20:27:21,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:21,350 INFO L225 Difference]: With dead ends: 119 [2020-10-15 20:27:21,350 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 20:27:21,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1298, Invalid=3258, Unknown=0, NotChecked=0, Total=4556 [2020-10-15 20:27:21,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 20:27:21,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 98. [2020-10-15 20:27:21,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 20:27:21,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 20:27:21,353 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 20:27:21,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:21,353 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 20:27:21,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:27:21,353 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 20:27:21,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:27:21,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:21,354 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:21,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2020-10-15 20:27:21,555 INFO L429 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:21,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:21,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1718238251, now seen corresponding path program 279 times [2020-10-15 20:27:21,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:21,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420857314] [2020-10-15 20:27:21,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:21,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:21,949 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:21,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420857314] [2020-10-15 20:27:21,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436227122] [2020-10-15 20:27:21,949 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 [2020-10-15 20:27:22,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-15 20:27:22,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:22,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:27:22,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:22,035 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:22,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:22,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 20:27:22,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744039931] [2020-10-15 20:27:22,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:27:22,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:22,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:27:22,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:27:22,036 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 20:27:23,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:23,689 INFO L93 Difference]: Finished difference Result 116 states and 287 transitions. [2020-10-15 20:27:23,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-15 20:27:23,690 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 20:27:23,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:23,691 INFO L225 Difference]: With dead ends: 116 [2020-10-15 20:27:23,691 INFO L226 Difference]: Without dead ends: 110 [2020-10-15 20:27:23,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1320, Invalid=3102, Unknown=0, NotChecked=0, Total=4422 [2020-10-15 20:27:23,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-15 20:27:23,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 99. [2020-10-15 20:27:23,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 20:27:23,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 20:27:23,694 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 20:27:23,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:23,694 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 20:27:23,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:27:23,694 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 20:27:23,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:27:23,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:23,695 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:23,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:23,895 INFO L429 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:23,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:23,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1734325391, now seen corresponding path program 280 times [2020-10-15 20:27:23,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:23,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256631023] [2020-10-15 20:27:23,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:23,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:24,302 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:24,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256631023] [2020-10-15 20:27:24,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20597520] [2020-10-15 20:27:24,302 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 [2020-10-15 20:27:24,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:27:24,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:24,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:27:24,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:24,391 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:27:24,415 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:24,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:24,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 20:27:24,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422157234] [2020-10-15 20:27:24,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:27:24,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:24,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:27:24,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:27:24,417 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 20:27:26,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:26,524 INFO L93 Difference]: Finished difference Result 115 states and 285 transitions. [2020-10-15 20:27:26,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-15 20:27:26,526 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 20:27:26,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:26,526 INFO L225 Difference]: With dead ends: 115 [2020-10-15 20:27:26,526 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 20:27:26,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1436, Invalid=3394, Unknown=0, NotChecked=0, Total=4830 [2020-10-15 20:27:26,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 20:27:26,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 98. [2020-10-15 20:27:26,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 20:27:26,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 20:27:26,529 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 20:27:26,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:26,529 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 20:27:26,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:27:26,529 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 20:27:26,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:27:26,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:26,529 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:26,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2020-10-15 20:27:26,730 INFO L429 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:26,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:26,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1734815501, now seen corresponding path program 281 times [2020-10-15 20:27:26,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:26,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266436598] [2020-10-15 20:27:26,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:26,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:27,138 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:27,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266436598] [2020-10-15 20:27:27,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838183379] [2020-10-15 20:27:27,139 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 [2020-10-15 20:27:27,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-15 20:27:27,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:27,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:27:27,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:27,225 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:27,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:27,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 20:27:27,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955312742] [2020-10-15 20:27:27,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:27:27,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:27,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:27:27,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:27:27,227 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 20:27:28,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:28,985 INFO L93 Difference]: Finished difference Result 131 states and 325 transitions. [2020-10-15 20:27:28,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 20:27:28,986 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 20:27:28,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:28,987 INFO L225 Difference]: With dead ends: 131 [2020-10-15 20:27:28,987 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 20:27:28,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1467, Invalid=3225, Unknown=0, NotChecked=0, Total=4692 [2020-10-15 20:27:28,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 20:27:28,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 102. [2020-10-15 20:27:28,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-15 20:27:28,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 265 transitions. [2020-10-15 20:27:28,990 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 265 transitions. Word has length 30 [2020-10-15 20:27:28,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:28,990 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 265 transitions. [2020-10-15 20:27:28,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:27:28,990 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 265 transitions. [2020-10-15 20:27:28,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:27:28,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:28,991 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:29,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:29,191 INFO L429 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:29,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:29,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1734832241, now seen corresponding path program 282 times [2020-10-15 20:27:29,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:29,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136626723] [2020-10-15 20:27:29,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:29,600 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:29,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136626723] [2020-10-15 20:27:29,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028086467] [2020-10-15 20:27:29,601 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 [2020-10-15 20:27:29,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-15 20:27:29,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:29,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:27:29,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:29,690 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:27:29,716 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:29,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:29,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 20:27:29,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073711320] [2020-10-15 20:27:29,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:27:29,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:29,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:27:29,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:27:29,717 INFO L87 Difference]: Start difference. First operand 102 states and 265 transitions. Second operand 27 states. [2020-10-15 20:27:31,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:31,903 INFO L93 Difference]: Finished difference Result 112 states and 281 transitions. [2020-10-15 20:27:31,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-15 20:27:31,904 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 20:27:31,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:31,904 INFO L225 Difference]: With dead ends: 112 [2020-10-15 20:27:31,904 INFO L226 Difference]: Without dead ends: 104 [2020-10-15 20:27:31,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1357 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1590, Invalid=3522, Unknown=0, NotChecked=0, Total=5112 [2020-10-15 20:27:31,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-15 20:27:31,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 73. [2020-10-15 20:27:31,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-15 20:27:31,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 178 transitions. [2020-10-15 20:27:31,907 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 178 transitions. Word has length 30 [2020-10-15 20:27:31,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:31,907 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 178 transitions. [2020-10-15 20:27:31,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:27:31,907 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 178 transitions. [2020-10-15 20:27:31,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:27:31,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:31,907 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:32,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:32,108 INFO L429 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:32,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:32,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1911532333, now seen corresponding path program 283 times [2020-10-15 20:27:32,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:32,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823908750] [2020-10-15 20:27:32,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:32,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:32,532 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:32,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823908750] [2020-10-15 20:27:32,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776451023] [2020-10-15 20:27:32,532 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 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 [2020-10-15 20:27:32,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:32,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:27:32,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:32,615 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:27:32,651 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:32,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:32,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 20:27:32,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546652374] [2020-10-15 20:27:32,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:27:32,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:32,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:27:32,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:27:32,652 INFO L87 Difference]: Start difference. First operand 73 states and 178 transitions. Second operand 27 states. [2020-10-15 20:27:34,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:34,684 INFO L93 Difference]: Finished difference Result 132 states and 323 transitions. [2020-10-15 20:27:34,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 20:27:34,685 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 20:27:34,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:34,685 INFO L225 Difference]: With dead ends: 132 [2020-10-15 20:27:34,685 INFO L226 Difference]: Without dead ends: 127 [2020-10-15 20:27:34,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1461 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1649, Invalid=3463, Unknown=0, NotChecked=0, Total=5112 [2020-10-15 20:27:34,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-15 20:27:34,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 100. [2020-10-15 20:27:34,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-15 20:27:34,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 257 transitions. [2020-10-15 20:27:34,687 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 257 transitions. Word has length 30 [2020-10-15 20:27:34,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:34,688 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 257 transitions. [2020-10-15 20:27:34,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:27:34,688 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 257 transitions. [2020-10-15 20:27:34,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:27:34,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:34,688 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:34,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:34,889 INFO L429 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:34,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:34,890 INFO L82 PathProgramCache]: Analyzing trace with hash -2054759070, now seen corresponding path program 284 times [2020-10-15 20:27:34,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:34,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993125999] [2020-10-15 20:27:34,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:34,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:35,333 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:35,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993125999] [2020-10-15 20:27:35,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141272014] [2020-10-15 20:27:35,334 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 [2020-10-15 20:27:35,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:27:35,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:35,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:27:35,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:35,425 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:27:35,462 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:35,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:35,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 20:27:35,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788839120] [2020-10-15 20:27:35,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:27:35,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:35,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:27:35,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:27:35,463 INFO L87 Difference]: Start difference. First operand 100 states and 257 transitions. Second operand 28 states. [2020-10-15 20:27:37,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:37,628 INFO L93 Difference]: Finished difference Result 108 states and 277 transitions. [2020-10-15 20:27:37,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 20:27:37,629 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 20:27:37,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:37,629 INFO L225 Difference]: With dead ends: 108 [2020-10-15 20:27:37,629 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 20:27:37,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1669, Invalid=3587, Unknown=0, NotChecked=0, Total=5256 [2020-10-15 20:27:37,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 20:27:37,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 74. [2020-10-15 20:27:37,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:27:37,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 182 transitions. [2020-10-15 20:27:37,632 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 182 transitions. Word has length 31 [2020-10-15 20:27:37,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:37,632 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 182 transitions. [2020-10-15 20:27:37,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:27:37,632 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 182 transitions. [2020-10-15 20:27:37,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:27:37,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:37,632 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:37,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:37,833 INFO L429 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:37,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:37,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1128130483, now seen corresponding path program 285 times [2020-10-15 20:27:37,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:37,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345659688] [2020-10-15 20:27:37,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:37,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:38,398 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:38,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345659688] [2020-10-15 20:27:38,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887018987] [2020-10-15 20:27:38,398 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 [2020-10-15 20:27:38,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-15 20:27:38,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:38,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:27:38,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:38,474 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:38,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:38,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 20:27:38,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443365812] [2020-10-15 20:27:38,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:27:38,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:38,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:27:38,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:27:38,475 INFO L87 Difference]: Start difference. First operand 74 states and 182 transitions. Second operand 27 states. [2020-10-15 20:27:39,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:39,400 INFO L93 Difference]: Finished difference Result 114 states and 265 transitions. [2020-10-15 20:27:39,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:27:39,402 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 20:27:39,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:39,402 INFO L225 Difference]: With dead ends: 114 [2020-10-15 20:27:39,402 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 20:27:39,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=783, Invalid=1667, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 20:27:39,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 20:27:39,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 82. [2020-10-15 20:27:39,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 20:27:39,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 201 transitions. [2020-10-15 20:27:39,404 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 201 transitions. Word has length 31 [2020-10-15 20:27:39,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:39,404 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 201 transitions. [2020-10-15 20:27:39,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:27:39,404 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 201 transitions. [2020-10-15 20:27:39,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:27:39,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:39,404 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:39,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:39,605 INFO L429 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:39,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:39,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1342928561, now seen corresponding path program 286 times [2020-10-15 20:27:39,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:39,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334497398] [2020-10-15 20:27:39,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:39,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:40,169 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:40,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334497398] [2020-10-15 20:27:40,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980697586] [2020-10-15 20:27:40,170 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 [2020-10-15 20:27:40,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:27:40,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:40,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:27:40,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:40,256 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:27:40,269 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:40,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:40,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 20:27:40,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140880513] [2020-10-15 20:27:40,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:27:40,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:40,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:27:40,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:27:40,270 INFO L87 Difference]: Start difference. First operand 82 states and 201 transitions. Second operand 28 states. [2020-10-15 20:27:41,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:41,289 INFO L93 Difference]: Finished difference Result 138 states and 313 transitions. [2020-10-15 20:27:41,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:27:41,290 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 20:27:41,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:41,291 INFO L225 Difference]: With dead ends: 138 [2020-10-15 20:27:41,291 INFO L226 Difference]: Without dead ends: 132 [2020-10-15 20:27:41,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=792, Invalid=1860, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 20:27:41,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-15 20:27:41,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 80. [2020-10-15 20:27:41,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:27:41,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 197 transitions. [2020-10-15 20:27:41,293 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 197 transitions. Word has length 31 [2020-10-15 20:27:41,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:41,294 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 197 transitions. [2020-10-15 20:27:41,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:27:41,294 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 197 transitions. [2020-10-15 20:27:41,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:27:41,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:41,294 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:41,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2020-10-15 20:27:41,495 INFO L429 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:41,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:41,496 INFO L82 PathProgramCache]: Analyzing trace with hash 517654063, now seen corresponding path program 287 times [2020-10-15 20:27:41,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:41,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311508236] [2020-10-15 20:27:41,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:41,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:42,056 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:42,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311508236] [2020-10-15 20:27:42,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355674132] [2020-10-15 20:27:42,057 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 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 [2020-10-15 20:27:42,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-15 20:27:42,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:42,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:27:42,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:42,130 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:42,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:42,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 20:27:42,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546244974] [2020-10-15 20:27:42,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:27:42,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:42,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:27:42,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:27:42,131 INFO L87 Difference]: Start difference. First operand 80 states and 197 transitions. Second operand 27 states. [2020-10-15 20:27:43,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:43,148 INFO L93 Difference]: Finished difference Result 139 states and 317 transitions. [2020-10-15 20:27:43,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:27:43,149 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 20:27:43,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:43,150 INFO L225 Difference]: With dead ends: 139 [2020-10-15 20:27:43,150 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 20:27:43,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=793, Invalid=1963, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 20:27:43,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 20:27:43,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 83. [2020-10-15 20:27:43,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 20:27:43,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 205 transitions. [2020-10-15 20:27:43,152 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 205 transitions. Word has length 31 [2020-10-15 20:27:43,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:43,153 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 205 transitions. [2020-10-15 20:27:43,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:27:43,153 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 205 transitions. [2020-10-15 20:27:43,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:27:43,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:43,153 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:43,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2020-10-15 20:27:43,354 INFO L429 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:43,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:43,355 INFO L82 PathProgramCache]: Analyzing trace with hash -521114221, now seen corresponding path program 288 times [2020-10-15 20:27:43,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:43,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433018847] [2020-10-15 20:27:43,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:43,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:43,923 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:43,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433018847] [2020-10-15 20:27:43,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663024832] [2020-10-15 20:27:43,924 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 [2020-10-15 20:27:43,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-15 20:27:43,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:43,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:27:43,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:44,019 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:27:44,033 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:44,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:44,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 20:27:44,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222763477] [2020-10-15 20:27:44,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:27:44,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:44,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:27:44,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:27:44,035 INFO L87 Difference]: Start difference. First operand 83 states and 205 transitions. Second operand 28 states. [2020-10-15 20:27:45,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:45,205 INFO L93 Difference]: Finished difference Result 159 states and 357 transitions. [2020-10-15 20:27:45,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:27:45,206 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 20:27:45,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:45,207 INFO L225 Difference]: With dead ends: 159 [2020-10-15 20:27:45,207 INFO L226 Difference]: Without dead ends: 153 [2020-10-15 20:27:45,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=833, Invalid=2137, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 20:27:45,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-15 20:27:45,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 82. [2020-10-15 20:27:45,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 20:27:45,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 203 transitions. [2020-10-15 20:27:45,209 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 203 transitions. Word has length 31 [2020-10-15 20:27:45,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:45,209 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 203 transitions. [2020-10-15 20:27:45,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:27:45,209 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 203 transitions. [2020-10-15 20:27:45,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:27:45,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:45,210 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:45,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2020-10-15 20:27:45,411 INFO L429 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:45,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:45,411 INFO L82 PathProgramCache]: Analyzing trace with hash -106330991, now seen corresponding path program 289 times [2020-10-15 20:27:45,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:45,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192704896] [2020-10-15 20:27:45,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:45,946 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:45,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192704896] [2020-10-15 20:27:45,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073347177] [2020-10-15 20:27:45,947 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 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 [2020-10-15 20:27:45,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:45,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:27:45,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:46,010 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:46,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:46,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 20:27:46,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475987682] [2020-10-15 20:27:46,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:27:46,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:46,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:27:46,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:27:46,011 INFO L87 Difference]: Start difference. First operand 82 states and 203 transitions. Second operand 27 states. [2020-10-15 20:27:47,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:47,162 INFO L93 Difference]: Finished difference Result 159 states and 359 transitions. [2020-10-15 20:27:47,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 20:27:47,163 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 20:27:47,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:47,163 INFO L225 Difference]: With dead ends: 159 [2020-10-15 20:27:47,163 INFO L226 Difference]: Without dead ends: 153 [2020-10-15 20:27:47,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=848, Invalid=2232, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 20:27:47,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-15 20:27:47,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 85. [2020-10-15 20:27:47,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-15 20:27:47,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 211 transitions. [2020-10-15 20:27:47,166 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 211 transitions. Word has length 31 [2020-10-15 20:27:47,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:47,166 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 211 transitions. [2020-10-15 20:27:47,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:27:47,166 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 211 transitions. [2020-10-15 20:27:47,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:27:47,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:47,167 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:47,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:47,367 INFO L429 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:47,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:47,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1828080395, now seen corresponding path program 290 times [2020-10-15 20:27:47,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:47,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940173933] [2020-10-15 20:27:47,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:47,919 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:47,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940173933] [2020-10-15 20:27:47,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690565051] [2020-10-15 20:27:47,920 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 [2020-10-15 20:27:47,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:27:47,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:47,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:27:47,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:48,004 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:27:48,021 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:48,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:48,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 20:27:48,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709597779] [2020-10-15 20:27:48,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:27:48,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:48,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:27:48,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:27:48,022 INFO L87 Difference]: Start difference. First operand 85 states and 211 transitions. Second operand 28 states. [2020-10-15 20:27:49,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:49,242 INFO L93 Difference]: Finished difference Result 156 states and 353 transitions. [2020-10-15 20:27:49,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:27:49,243 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 20:27:49,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:49,243 INFO L225 Difference]: With dead ends: 156 [2020-10-15 20:27:49,243 INFO L226 Difference]: Without dead ends: 150 [2020-10-15 20:27:49,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=850, Invalid=2342, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 20:27:49,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-15 20:27:49,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 84. [2020-10-15 20:27:49,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-15 20:27:49,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 209 transitions. [2020-10-15 20:27:49,246 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 209 transitions. Word has length 31 [2020-10-15 20:27:49,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:49,246 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 209 transitions. [2020-10-15 20:27:49,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:27:49,246 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 209 transitions. [2020-10-15 20:27:49,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:27:49,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:49,246 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:49,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:49,447 INFO L429 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:49,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:49,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1282962291, now seen corresponding path program 291 times [2020-10-15 20:27:49,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:49,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587437513] [2020-10-15 20:27:49,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:49,975 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:49,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587437513] [2020-10-15 20:27:49,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096128004] [2020-10-15 20:27:49,976 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 [2020-10-15 20:27:50,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-15 20:27:50,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:50,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:27:50,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:50,053 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:50,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:50,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 20:27:50,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890039012] [2020-10-15 20:27:50,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:27:50,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:50,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:27:50,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:27:50,054 INFO L87 Difference]: Start difference. First operand 84 states and 209 transitions. Second operand 27 states. [2020-10-15 20:27:51,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:51,302 INFO L93 Difference]: Finished difference Result 157 states and 357 transitions. [2020-10-15 20:27:51,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:27:51,303 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 20:27:51,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:51,304 INFO L225 Difference]: With dead ends: 157 [2020-10-15 20:27:51,304 INFO L226 Difference]: Without dead ends: 151 [2020-10-15 20:27:51,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=880, Invalid=2426, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 20:27:51,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-15 20:27:51,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 87. [2020-10-15 20:27:51,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:27:51,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 217 transitions. [2020-10-15 20:27:51,307 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 217 transitions. Word has length 31 [2020-10-15 20:27:51,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:51,307 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 217 transitions. [2020-10-15 20:27:51,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:27:51,307 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 217 transitions. [2020-10-15 20:27:51,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:27:51,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:51,307 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:51,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:51,508 INFO L429 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:51,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:51,508 INFO L82 PathProgramCache]: Analyzing trace with hash -265196329, now seen corresponding path program 292 times [2020-10-15 20:27:51,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:51,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261004458] [2020-10-15 20:27:51,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:51,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:52,040 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:52,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261004458] [2020-10-15 20:27:52,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874716358] [2020-10-15 20:27:52,040 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 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 [2020-10-15 20:27:52,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:27:52,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:52,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:27:52,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:52,129 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:27:52,147 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:52,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:52,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 20:27:52,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924302234] [2020-10-15 20:27:52,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:27:52,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:52,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:27:52,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:27:52,148 INFO L87 Difference]: Start difference. First operand 87 states and 217 transitions. Second operand 28 states. [2020-10-15 20:27:53,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:53,520 INFO L93 Difference]: Finished difference Result 154 states and 351 transitions. [2020-10-15 20:27:53,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:27:53,522 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 20:27:53,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:53,522 INFO L225 Difference]: With dead ends: 154 [2020-10-15 20:27:53,522 INFO L226 Difference]: Without dead ends: 148 [2020-10-15 20:27:53,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=883, Invalid=2539, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 20:27:53,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-15 20:27:53,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 86. [2020-10-15 20:27:53,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:27:53,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 215 transitions. [2020-10-15 20:27:53,525 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 215 transitions. Word has length 31 [2020-10-15 20:27:53,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:53,525 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 215 transitions. [2020-10-15 20:27:53,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:27:53,525 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 215 transitions. [2020-10-15 20:27:53,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:27:53,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:53,525 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:53,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2020-10-15 20:27:53,726 INFO L429 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:53,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:53,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1566985515, now seen corresponding path program 293 times [2020-10-15 20:27:53,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:53,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510988390] [2020-10-15 20:27:53,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:53,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:54,234 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:54,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510988390] [2020-10-15 20:27:54,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753249960] [2020-10-15 20:27:54,235 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 [2020-10-15 20:27:54,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-15 20:27:54,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:54,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:27:54,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:54,318 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:54,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:54,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 20:27:54,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745550993] [2020-10-15 20:27:54,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:27:54,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:54,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:27:54,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:27:54,319 INFO L87 Difference]: Start difference. First operand 86 states and 215 transitions. Second operand 27 states. [2020-10-15 20:27:55,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:55,648 INFO L93 Difference]: Finished difference Result 155 states and 355 transitions. [2020-10-15 20:27:55,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 20:27:55,650 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 20:27:55,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:55,650 INFO L225 Difference]: With dead ends: 155 [2020-10-15 20:27:55,650 INFO L226 Difference]: Without dead ends: 149 [2020-10-15 20:27:55,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=928, Invalid=2612, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 20:27:55,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-15 20:27:55,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 89. [2020-10-15 20:27:55,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-15 20:27:55,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 223 transitions. [2020-10-15 20:27:55,653 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 223 transitions. Word has length 31 [2020-10-15 20:27:55,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:55,654 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 223 transitions. [2020-10-15 20:27:55,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:27:55,654 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 223 transitions. [2020-10-15 20:27:55,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:27:55,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:55,654 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:55,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:55,862 INFO L429 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:55,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:55,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1917433145, now seen corresponding path program 294 times [2020-10-15 20:27:55,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:55,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995295452] [2020-10-15 20:27:55,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:55,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:56,374 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:56,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995295452] [2020-10-15 20:27:56,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084956515] [2020-10-15 20:27:56,375 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 [2020-10-15 20:27:56,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-15 20:27:56,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:56,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:27:56,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:56,469 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:27:56,494 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:56,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:56,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 20:27:56,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246979911] [2020-10-15 20:27:56,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:27:56,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:56,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:27:56,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:27:56,496 INFO L87 Difference]: Start difference. First operand 89 states and 223 transitions. Second operand 28 states. [2020-10-15 20:27:58,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:58,002 INFO L93 Difference]: Finished difference Result 152 states and 349 transitions. [2020-10-15 20:27:58,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 20:27:58,003 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 20:27:58,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:58,004 INFO L225 Difference]: With dead ends: 152 [2020-10-15 20:27:58,004 INFO L226 Difference]: Without dead ends: 146 [2020-10-15 20:27:58,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=932, Invalid=2728, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 20:27:58,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-15 20:27:58,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 88. [2020-10-15 20:27:58,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 20:27:58,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 221 transitions. [2020-10-15 20:27:58,007 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 221 transitions. Word has length 31 [2020-10-15 20:27:58,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:58,007 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 221 transitions. [2020-10-15 20:27:58,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:27:58,007 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 221 transitions. [2020-10-15 20:27:58,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:27:58,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:58,007 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:58,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:58,209 INFO L429 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:58,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:58,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1969709751, now seen corresponding path program 295 times [2020-10-15 20:27:58,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:58,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260571401] [2020-10-15 20:27:58,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:58,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:58,702 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:58,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260571401] [2020-10-15 20:27:58,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138983710] [2020-10-15 20:27:58,703 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 [2020-10-15 20:27:58,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:58,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:27:58,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:58,776 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:58,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:58,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 20:27:58,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586767373] [2020-10-15 20:27:58,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:27:58,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:58,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:27:58,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:27:58,778 INFO L87 Difference]: Start difference. First operand 88 states and 221 transitions. Second operand 27 states. [2020-10-15 20:28:00,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:00,194 INFO L93 Difference]: Finished difference Result 153 states and 353 transitions. [2020-10-15 20:28:00,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 20:28:00,195 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 20:28:00,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:00,196 INFO L225 Difference]: With dead ends: 153 [2020-10-15 20:28:00,196 INFO L226 Difference]: Without dead ends: 147 [2020-10-15 20:28:00,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=992, Invalid=2790, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 20:28:00,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-15 20:28:00,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 91. [2020-10-15 20:28:00,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 20:28:00,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 229 transitions. [2020-10-15 20:28:00,199 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 229 transitions. Word has length 31 [2020-10-15 20:28:00,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:00,199 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 229 transitions. [2020-10-15 20:28:00,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:28:00,199 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 229 transitions. [2020-10-15 20:28:00,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:28:00,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:00,199 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:00,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:00,400 INFO L429 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:00,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:00,401 INFO L82 PathProgramCache]: Analyzing trace with hash -449008101, now seen corresponding path program 296 times [2020-10-15 20:28:00,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:00,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379489224] [2020-10-15 20:28:00,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:00,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:00,905 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:00,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379489224] [2020-10-15 20:28:00,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469093580] [2020-10-15 20:28:00,906 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 [2020-10-15 20:28:00,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:28:00,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:28:00,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:28:00,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:00,990 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:28:01,009 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:01,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:01,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 20:28:01,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985260383] [2020-10-15 20:28:01,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:28:01,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:01,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:28:01,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:28:01,010 INFO L87 Difference]: Start difference. First operand 91 states and 229 transitions. Second operand 28 states. [2020-10-15 20:28:02,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:02,634 INFO L93 Difference]: Finished difference Result 150 states and 347 transitions. [2020-10-15 20:28:02,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 20:28:02,635 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 20:28:02,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:02,636 INFO L225 Difference]: With dead ends: 150 [2020-10-15 20:28:02,636 INFO L226 Difference]: Without dead ends: 144 [2020-10-15 20:28:02,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=997, Invalid=2909, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 20:28:02,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-15 20:28:02,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 90. [2020-10-15 20:28:02,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-15 20:28:02,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 227 transitions. [2020-10-15 20:28:02,638 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 227 transitions. Word has length 31 [2020-10-15 20:28:02,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:02,639 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 227 transitions. [2020-10-15 20:28:02,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:28:02,639 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 227 transitions. [2020-10-15 20:28:02,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:28:02,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:02,639 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:02,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:02,840 INFO L429 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:02,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:02,840 INFO L82 PathProgramCache]: Analyzing trace with hash 239313689, now seen corresponding path program 297 times [2020-10-15 20:28:02,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:02,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981332304] [2020-10-15 20:28:02,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:02,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:03,321 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:03,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981332304] [2020-10-15 20:28:03,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875504548] [2020-10-15 20:28:03,322 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 [2020-10-15 20:28:03,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-15 20:28:03,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:28:03,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:28:03,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:03,408 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:03,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:03,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 20:28:03,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187528120] [2020-10-15 20:28:03,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:28:03,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:03,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:28:03,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:28:03,409 INFO L87 Difference]: Start difference. First operand 90 states and 227 transitions. Second operand 27 states. [2020-10-15 20:28:04,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:04,931 INFO L93 Difference]: Finished difference Result 151 states and 351 transitions. [2020-10-15 20:28:04,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 20:28:04,932 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 20:28:04,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:04,937 INFO L225 Difference]: With dead ends: 151 [2020-10-15 20:28:04,937 INFO L226 Difference]: Without dead ends: 145 [2020-10-15 20:28:04,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1072, Invalid=2960, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 20:28:04,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-15 20:28:04,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 93. [2020-10-15 20:28:04,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 20:28:04,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 235 transitions. [2020-10-15 20:28:04,939 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 235 transitions. Word has length 31 [2020-10-15 20:28:04,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:04,939 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 235 transitions. [2020-10-15 20:28:04,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:28:04,939 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 235 transitions. [2020-10-15 20:28:04,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:28:04,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:04,940 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:05,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:05,140 INFO L429 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:05,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:05,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1224505213, now seen corresponding path program 298 times [2020-10-15 20:28:05,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:05,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715562217] [2020-10-15 20:28:05,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:05,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:05,626 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:05,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715562217] [2020-10-15 20:28:05,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780855829] [2020-10-15 20:28:05,627 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 [2020-10-15 20:28:05,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:28:05,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:28:05,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:28:05,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:05,726 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:28:05,749 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:05,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:05,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 20:28:05,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329655981] [2020-10-15 20:28:05,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:28:05,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:05,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:28:05,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:28:05,750 INFO L87 Difference]: Start difference. First operand 93 states and 235 transitions. Second operand 28 states. [2020-10-15 20:28:07,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:07,523 INFO L93 Difference]: Finished difference Result 148 states and 345 transitions. [2020-10-15 20:28:07,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 20:28:07,524 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 20:28:07,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:07,525 INFO L225 Difference]: With dead ends: 148 [2020-10-15 20:28:07,525 INFO L226 Difference]: Without dead ends: 142 [2020-10-15 20:28:07,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1078, Invalid=3082, Unknown=0, NotChecked=0, Total=4160 [2020-10-15 20:28:07,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-15 20:28:07,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 92. [2020-10-15 20:28:07,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 20:28:07,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 233 transitions. [2020-10-15 20:28:07,527 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 233 transitions. Word has length 31 [2020-10-15 20:28:07,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:07,527 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 233 transitions. [2020-10-15 20:28:07,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:28:07,528 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 233 transitions. [2020-10-15 20:28:07,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:28:07,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:07,528 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:07,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2020-10-15 20:28:07,737 INFO L429 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:07,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:07,737 INFO L82 PathProgramCache]: Analyzing trace with hash -392653829, now seen corresponding path program 299 times [2020-10-15 20:28:07,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:07,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133655498] [2020-10-15 20:28:07,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:07,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:08,213 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:08,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133655498] [2020-10-15 20:28:08,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806523217] [2020-10-15 20:28:08,213 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 [2020-10-15 20:28:08,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-15 20:28:08,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:28:08,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:28:08,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:08,297 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:08,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:08,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 20:28:08,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808551426] [2020-10-15 20:28:08,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:28:08,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:08,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:28:08,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:28:08,298 INFO L87 Difference]: Start difference. First operand 92 states and 233 transitions. Second operand 27 states. [2020-10-15 20:28:09,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:09,944 INFO L93 Difference]: Finished difference Result 149 states and 349 transitions. [2020-10-15 20:28:09,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 20:28:09,945 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 20:28:09,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:09,945 INFO L225 Difference]: With dead ends: 149 [2020-10-15 20:28:09,945 INFO L226 Difference]: Without dead ends: 143 [2020-10-15 20:28:09,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1168, Invalid=3122, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 20:28:09,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-15 20:28:09,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 95. [2020-10-15 20:28:09,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-15 20:28:09,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 241 transitions. [2020-10-15 20:28:09,948 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 241 transitions. Word has length 31 [2020-10-15 20:28:09,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:09,948 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 241 transitions. [2020-10-15 20:28:09,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:28:09,948 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 241 transitions. [2020-10-15 20:28:09,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:28:09,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:09,949 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:10,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2020-10-15 20:28:10,149 INFO L429 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:10,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:10,150 INFO L82 PathProgramCache]: Analyzing trace with hash 864235871, now seen corresponding path program 300 times [2020-10-15 20:28:10,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:10,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136164149] [2020-10-15 20:28:10,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:10,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:10,634 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:10,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136164149] [2020-10-15 20:28:10,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477691155] [2020-10-15 20:28:10,635 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 [2020-10-15 20:28:10,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-15 20:28:10,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:28:10,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:28:10,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:10,726 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:28:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:10,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:10,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 20:28:10,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228639799] [2020-10-15 20:28:10,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:28:10,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:10,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:28:10,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:28:10,750 INFO L87 Difference]: Start difference. First operand 95 states and 241 transitions. Second operand 28 states. [2020-10-15 20:28:12,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:12,655 INFO L93 Difference]: Finished difference Result 146 states and 343 transitions. [2020-10-15 20:28:12,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 20:28:12,656 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 20:28:12,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:12,657 INFO L225 Difference]: With dead ends: 146 [2020-10-15 20:28:12,657 INFO L226 Difference]: Without dead ends: 140 [2020-10-15 20:28:12,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1175, Invalid=3247, Unknown=0, NotChecked=0, Total=4422 [2020-10-15 20:28:12,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-15 20:28:12,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 94. [2020-10-15 20:28:12,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 20:28:12,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 239 transitions. [2020-10-15 20:28:12,659 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 239 transitions. Word has length 31 [2020-10-15 20:28:12,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:12,659 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 239 transitions. [2020-10-15 20:28:12,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:28:12,660 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 239 transitions. [2020-10-15 20:28:12,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:28:12,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:12,660 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:12,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2020-10-15 20:28:12,861 INFO L429 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:12,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:12,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1814538915, now seen corresponding path program 301 times [2020-10-15 20:28:12,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:12,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809113989] [2020-10-15 20:28:12,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:12,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:13,334 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:13,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809113989] [2020-10-15 20:28:13,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703723059] [2020-10-15 20:28:13,335 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 [2020-10-15 20:28:13,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:13,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:28:13,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:13,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:13,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 20:28:13,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907666418] [2020-10-15 20:28:13,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:28:13,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:13,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:28:13,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:28:13,423 INFO L87 Difference]: Start difference. First operand 94 states and 239 transitions. Second operand 27 states. [2020-10-15 20:28:15,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:15,131 INFO L93 Difference]: Finished difference Result 147 states and 347 transitions. [2020-10-15 20:28:15,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-15 20:28:15,132 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 20:28:15,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:15,133 INFO L225 Difference]: With dead ends: 147 [2020-10-15 20:28:15,133 INFO L226 Difference]: Without dead ends: 141 [2020-10-15 20:28:15,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1280, Invalid=3276, Unknown=0, NotChecked=0, Total=4556 [2020-10-15 20:28:15,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-15 20:28:15,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 97. [2020-10-15 20:28:15,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-15 20:28:15,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 247 transitions. [2020-10-15 20:28:15,135 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 247 transitions. Word has length 31 [2020-10-15 20:28:15,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:15,135 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 247 transitions. [2020-10-15 20:28:15,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:28:15,136 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 247 transitions. [2020-10-15 20:28:15,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:28:15,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:15,136 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:15,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:15,337 INFO L429 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:15,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:15,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1294795839, now seen corresponding path program 302 times [2020-10-15 20:28:15,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:15,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127610242] [2020-10-15 20:28:15,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:15,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:15,813 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:15,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127610242] [2020-10-15 20:28:15,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972852912] [2020-10-15 20:28:15,813 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 [2020-10-15 20:28:15,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:28:15,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:28:15,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:28:15,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:15,903 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:28:15,928 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:15,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:15,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 20:28:15,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595074208] [2020-10-15 20:28:15,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:28:15,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:15,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:28:15,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:28:15,929 INFO L87 Difference]: Start difference. First operand 97 states and 247 transitions. Second operand 28 states. [2020-10-15 20:28:17,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:17,982 INFO L93 Difference]: Finished difference Result 144 states and 341 transitions. [2020-10-15 20:28:17,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-15 20:28:17,983 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 20:28:17,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:17,983 INFO L225 Difference]: With dead ends: 144 [2020-10-15 20:28:17,983 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 20:28:17,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1288, Invalid=3404, Unknown=0, NotChecked=0, Total=4692 [2020-10-15 20:28:17,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 20:28:17,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 96. [2020-10-15 20:28:17,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-15 20:28:17,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 245 transitions. [2020-10-15 20:28:17,986 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 245 transitions. Word has length 31 [2020-10-15 20:28:17,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:17,987 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 245 transitions. [2020-10-15 20:28:17,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:28:17,987 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 245 transitions. [2020-10-15 20:28:17,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:28:17,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:17,987 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:18,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2020-10-15 20:28:18,188 INFO L429 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:18,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:18,188 INFO L82 PathProgramCache]: Analyzing trace with hash 360515391, now seen corresponding path program 303 times [2020-10-15 20:28:18,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:18,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649431790] [2020-10-15 20:28:18,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:18,659 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:18,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649431790] [2020-10-15 20:28:18,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496974436] [2020-10-15 20:28:18,659 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 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 [2020-10-15 20:28:18,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-15 20:28:18,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:28:18,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:28:18,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:18,752 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:18,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:18,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 20:28:18,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291260621] [2020-10-15 20:28:18,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:28:18,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:18,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:28:18,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:28:18,753 INFO L87 Difference]: Start difference. First operand 96 states and 245 transitions. Second operand 27 states. [2020-10-15 20:28:20,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:20,573 INFO L93 Difference]: Finished difference Result 145 states and 345 transitions. [2020-10-15 20:28:20,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 20:28:20,575 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 20:28:20,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:20,575 INFO L225 Difference]: With dead ends: 145 [2020-10-15 20:28:20,575 INFO L226 Difference]: Without dead ends: 139 [2020-10-15 20:28:20,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1408, Invalid=3422, Unknown=0, NotChecked=0, Total=4830 [2020-10-15 20:28:20,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-15 20:28:20,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 99. [2020-10-15 20:28:20,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 20:28:20,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 20:28:20,578 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 31 [2020-10-15 20:28:20,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:20,578 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 20:28:20,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:28:20,578 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 20:28:20,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:28:20,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:20,579 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:20,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:20,779 INFO L429 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:20,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:20,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1359612253, now seen corresponding path program 304 times [2020-10-15 20:28:20,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:20,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551237028] [2020-10-15 20:28:20,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:20,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:21,262 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:21,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551237028] [2020-10-15 20:28:21,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061659007] [2020-10-15 20:28:21,262 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 [2020-10-15 20:28:21,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:28:21,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:28:21,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:28:21,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:21,356 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:28:21,383 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:21,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:21,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 20:28:21,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015279439] [2020-10-15 20:28:21,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:28:21,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:21,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:28:21,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:28:21,385 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 28 states. [2020-10-15 20:28:23,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:23,589 INFO L93 Difference]: Finished difference Result 142 states and 339 transitions. [2020-10-15 20:28:23,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-15 20:28:23,591 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 20:28:23,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:23,591 INFO L225 Difference]: With dead ends: 142 [2020-10-15 20:28:23,591 INFO L226 Difference]: Without dead ends: 136 [2020-10-15 20:28:23,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1417, Invalid=3553, Unknown=0, NotChecked=0, Total=4970 [2020-10-15 20:28:23,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-15 20:28:23,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 98. [2020-10-15 20:28:23,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 20:28:23,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 20:28:23,594 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 31 [2020-10-15 20:28:23,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:23,594 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 20:28:23,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:28:23,594 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 20:28:23,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:28:23,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:23,595 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:23,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2020-10-15 20:28:23,795 INFO L429 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:23,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:23,796 INFO L82 PathProgramCache]: Analyzing trace with hash -888616543, now seen corresponding path program 305 times [2020-10-15 20:28:23,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:23,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388361497] [2020-10-15 20:28:23,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:23,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:24,291 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:24,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388361497] [2020-10-15 20:28:24,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701794517] [2020-10-15 20:28:24,292 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 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 [2020-10-15 20:28:24,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-15 20:28:24,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:28:24,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:28:24,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:24,384 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:24,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:24,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 20:28:24,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489624006] [2020-10-15 20:28:24,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:28:24,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:24,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:28:24,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:28:24,385 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 27 states. [2020-10-15 20:28:26,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:26,346 INFO L93 Difference]: Finished difference Result 143 states and 343 transitions. [2020-10-15 20:28:26,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-15 20:28:26,347 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 20:28:26,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:26,348 INFO L225 Difference]: With dead ends: 143 [2020-10-15 20:28:26,348 INFO L226 Difference]: Without dead ends: 137 [2020-10-15 20:28:26,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1552, Invalid=3560, Unknown=0, NotChecked=0, Total=5112 [2020-10-15 20:28:26,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-15 20:28:26,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 101. [2020-10-15 20:28:26,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 20:28:26,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 259 transitions. [2020-10-15 20:28:26,350 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 259 transitions. Word has length 31 [2020-10-15 20:28:26,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:26,350 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 259 transitions. [2020-10-15 20:28:26,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:28:26,351 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 259 transitions. [2020-10-15 20:28:26,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:28:26,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:26,351 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:26,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:26,552 INFO L429 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:26,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:26,552 INFO L82 PathProgramCache]: Analyzing trace with hash -872529403, now seen corresponding path program 306 times [2020-10-15 20:28:26,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:26,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829004822] [2020-10-15 20:28:26,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:27,036 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:27,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829004822] [2020-10-15 20:28:27,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508287783] [2020-10-15 20:28:27,037 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 [2020-10-15 20:28:27,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-15 20:28:27,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:28:27,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:28:27,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:27,129 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:28:27,157 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:27,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:27,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 20:28:27,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750193774] [2020-10-15 20:28:27,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:28:27,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:27,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:28:27,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:28:27,159 INFO L87 Difference]: Start difference. First operand 101 states and 259 transitions. Second operand 28 states. [2020-10-15 20:28:29,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:29,500 INFO L93 Difference]: Finished difference Result 140 states and 337 transitions. [2020-10-15 20:28:29,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-15 20:28:29,502 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 20:28:29,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:29,502 INFO L225 Difference]: With dead ends: 140 [2020-10-15 20:28:29,502 INFO L226 Difference]: Without dead ends: 134 [2020-10-15 20:28:29,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1453 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1562, Invalid=3694, Unknown=0, NotChecked=0, Total=5256 [2020-10-15 20:28:29,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-15 20:28:29,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 100. [2020-10-15 20:28:29,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-15 20:28:29,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 257 transitions. [2020-10-15 20:28:29,505 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 257 transitions. Word has length 31 [2020-10-15 20:28:29,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:29,505 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 257 transitions. [2020-10-15 20:28:29,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:28:29,505 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 257 transitions. [2020-10-15 20:28:29,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:28:29,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:29,506 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:29,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:29,712 INFO L429 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:29,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:29,712 INFO L82 PathProgramCache]: Analyzing trace with hash -872039293, now seen corresponding path program 307 times [2020-10-15 20:28:29,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:29,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815737418] [2020-10-15 20:28:29,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:29,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:30,204 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:30,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815737418] [2020-10-15 20:28:30,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16516690] [2020-10-15 20:28:30,204 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 [2020-10-15 20:28:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:30,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:28:30,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:30,294 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:30,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:30,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 20:28:30,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691380420] [2020-10-15 20:28:30,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:28:30,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:30,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:28:30,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:28:30,295 INFO L87 Difference]: Start difference. First operand 100 states and 257 transitions. Second operand 27 states. [2020-10-15 20:28:32,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:32,310 INFO L93 Difference]: Finished difference Result 160 states and 387 transitions. [2020-10-15 20:28:32,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-15 20:28:32,311 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 20:28:32,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:32,311 INFO L225 Difference]: With dead ends: 160 [2020-10-15 20:28:32,311 INFO L226 Difference]: Without dead ends: 154 [2020-10-15 20:28:32,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1572 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1712, Invalid=3690, Unknown=0, NotChecked=0, Total=5402 [2020-10-15 20:28:32,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-15 20:28:32,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 106. [2020-10-15 20:28:32,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-15 20:28:32,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 277 transitions. [2020-10-15 20:28:32,314 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 277 transitions. Word has length 31 [2020-10-15 20:28:32,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:32,314 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 277 transitions. [2020-10-15 20:28:32,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:28:32,314 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 277 transitions. [2020-10-15 20:28:32,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:28:32,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:32,315 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:32,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2020-10-15 20:28:32,515 INFO L429 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:32,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:32,516 INFO L82 PathProgramCache]: Analyzing trace with hash -872022553, now seen corresponding path program 308 times [2020-10-15 20:28:32,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:32,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997797534] [2020-10-15 20:28:32,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:32,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:33,006 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:33,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997797534] [2020-10-15 20:28:33,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683858076] [2020-10-15 20:28:33,007 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 [2020-10-15 20:28:33,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:28:33,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:28:33,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:28:33,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:33,136 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:33,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:33,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 20:28:33,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070494090] [2020-10-15 20:28:33,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:28:33,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:33,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:28:33,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:28:33,137 INFO L87 Difference]: Start difference. First operand 106 states and 277 transitions. Second operand 28 states. [2020-10-15 20:28:35,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:35,488 INFO L93 Difference]: Finished difference Result 141 states and 343 transitions. [2020-10-15 20:28:35,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-15 20:28:35,490 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 20:28:35,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:35,491 INFO L225 Difference]: With dead ends: 141 [2020-10-15 20:28:35,491 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 20:28:35,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1490 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1555, Invalid=3995, Unknown=0, NotChecked=0, Total=5550 [2020-10-15 20:28:35,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 20:28:35,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 103. [2020-10-15 20:28:35,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-15 20:28:35,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 265 transitions. [2020-10-15 20:28:35,493 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 265 transitions. Word has length 31 [2020-10-15 20:28:35,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:35,494 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 265 transitions. [2020-10-15 20:28:35,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:28:35,494 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 265 transitions. [2020-10-15 20:28:35,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:28:35,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:35,494 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:35,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:35,695 INFO L429 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:35,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:35,695 INFO L82 PathProgramCache]: Analyzing trace with hash 470887608, now seen corresponding path program 309 times [2020-10-15 20:28:35,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:35,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929077275] [2020-10-15 20:28:35,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:35,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:36,381 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:36,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929077275] [2020-10-15 20:28:36,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308056360] [2020-10-15 20:28:36,382 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 [2020-10-15 20:28:36,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-15 20:28:36,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:28:36,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:28:36,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:36,453 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:36,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:36,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 20:28:36,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136757869] [2020-10-15 20:28:36,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:28:36,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:36,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:28:36,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:28:36,454 INFO L87 Difference]: Start difference. First operand 103 states and 265 transitions. Second operand 28 states. [2020-10-15 20:28:37,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:37,510 INFO L93 Difference]: Finished difference Result 164 states and 387 transitions. [2020-10-15 20:28:37,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:28:37,511 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 20:28:37,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:37,512 INFO L225 Difference]: With dead ends: 164 [2020-10-15 20:28:37,512 INFO L226 Difference]: Without dead ends: 158 [2020-10-15 20:28:37,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=841, Invalid=1915, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 20:28:37,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-15 20:28:37,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 105. [2020-10-15 20:28:37,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 20:28:37,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 20:28:37,514 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 20:28:37,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:37,515 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 20:28:37,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:28:37,515 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 20:28:37,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:28:37,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:37,515 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:37,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2020-10-15 20:28:37,716 INFO L429 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:37,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:37,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1353020644, now seen corresponding path program 310 times [2020-10-15 20:28:37,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:37,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529701920] [2020-10-15 20:28:37,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:37,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:38,403 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:38,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529701920] [2020-10-15 20:28:38,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100659386] [2020-10-15 20:28:38,403 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 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 [2020-10-15 20:28:38,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:28:38,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:28:38,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:28:38,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:38,489 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:28:38,505 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:38,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:38,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 20:28:38,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089593374] [2020-10-15 20:28:38,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:28:38,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:38,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:28:38,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=633, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:28:38,506 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 20:28:39,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:39,784 INFO L93 Difference]: Finished difference Result 161 states and 381 transitions. [2020-10-15 20:28:39,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:28:39,786 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 20:28:39,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:39,786 INFO L225 Difference]: With dead ends: 161 [2020-10-15 20:28:39,786 INFO L226 Difference]: Without dead ends: 155 [2020-10-15 20:28:39,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=897, Invalid=2183, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 20:28:39,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-15 20:28:39,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 104. [2020-10-15 20:28:39,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 20:28:39,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 20:28:39,789 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 20:28:39,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:39,789 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 20:28:39,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:28:39,789 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 20:28:39,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:28:39,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:39,789 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:39,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2020-10-15 20:28:39,990 INFO L429 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:39,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:39,991 INFO L82 PathProgramCache]: Analyzing trace with hash 2116672154, now seen corresponding path program 311 times [2020-10-15 20:28:39,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:39,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776054347] [2020-10-15 20:28:39,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:39,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:40,638 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:40,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776054347] [2020-10-15 20:28:40,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232037820] [2020-10-15 20:28:40,639 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 [2020-10-15 20:28:40,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-15 20:28:40,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:28:40,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:28:40,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:40,718 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:40,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:40,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 20:28:40,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583862390] [2020-10-15 20:28:40,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:28:40,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:40,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:28:40,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:28:40,719 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 20:28:41,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:41,894 INFO L93 Difference]: Finished difference Result 158 states and 375 transitions. [2020-10-15 20:28:41,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:28:41,896 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 20:28:41,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:41,896 INFO L225 Difference]: With dead ends: 158 [2020-10-15 20:28:41,896 INFO L226 Difference]: Without dead ends: 152 [2020-10-15 20:28:41,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=842, Invalid=2128, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 20:28:41,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-15 20:28:41,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 105. [2020-10-15 20:28:41,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 20:28:41,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 20:28:41,899 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 20:28:41,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:41,899 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 20:28:41,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:28:41,899 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 20:28:41,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:28:41,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:41,899 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:42,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2020-10-15 20:28:42,100 INFO L429 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:42,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:42,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1077903870, now seen corresponding path program 312 times [2020-10-15 20:28:42,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:42,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129855995] [2020-10-15 20:28:42,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:42,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:42,756 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:42,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129855995] [2020-10-15 20:28:42,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299831798] [2020-10-15 20:28:42,757 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 [2020-10-15 20:28:42,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-15 20:28:42,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:28:42,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:28:42,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:42,863 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:28:42,880 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:42,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:42,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 20:28:42,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727731031] [2020-10-15 20:28:42,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:28:42,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:42,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:28:42,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:28:42,881 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 20:28:44,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:44,307 INFO L93 Difference]: Finished difference Result 157 states and 373 transitions. [2020-10-15 20:28:44,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:28:44,308 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 20:28:44,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:44,309 INFO L225 Difference]: With dead ends: 157 [2020-10-15 20:28:44,309 INFO L226 Difference]: Without dead ends: 151 [2020-10-15 20:28:44,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=905, Invalid=2401, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 20:28:44,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-15 20:28:44,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 104. [2020-10-15 20:28:44,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 20:28:44,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 20:28:44,311 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 20:28:44,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:44,312 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 20:28:44,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:28:44,312 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 20:28:44,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:28:44,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:44,312 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:44,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2020-10-15 20:28:44,513 INFO L429 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:44,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:44,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1492687100, now seen corresponding path program 313 times [2020-10-15 20:28:44,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:44,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927046568] [2020-10-15 20:28:44,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:44,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:45,150 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:45,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927046568] [2020-10-15 20:28:45,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819063859] [2020-10-15 20:28:45,151 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 [2020-10-15 20:28:45,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:45,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:28:45,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:45,225 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:45,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:45,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 20:28:45,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580674675] [2020-10-15 20:28:45,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:28:45,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:45,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:28:45,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:28:45,226 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 20:28:46,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:46,511 INFO L93 Difference]: Finished difference Result 154 states and 367 transitions. [2020-10-15 20:28:46,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 20:28:46,513 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 20:28:46,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:46,513 INFO L225 Difference]: With dead ends: 154 [2020-10-15 20:28:46,513 INFO L226 Difference]: Without dead ends: 148 [2020-10-15 20:28:46,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=859, Invalid=2333, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 20:28:46,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-15 20:28:46,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 105. [2020-10-15 20:28:46,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 20:28:46,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 20:28:46,516 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 20:28:46,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:46,516 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 20:28:46,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:28:46,516 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 20:28:46,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:28:46,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:46,517 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:46,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:46,718 INFO L429 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:46,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:46,718 INFO L82 PathProgramCache]: Analyzing trace with hash -229062304, now seen corresponding path program 314 times [2020-10-15 20:28:46,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:46,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656088878] [2020-10-15 20:28:46,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:46,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:47,358 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:47,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656088878] [2020-10-15 20:28:47,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524088239] [2020-10-15 20:28:47,358 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 [2020-10-15 20:28:47,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:28:47,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:28:47,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:28:47,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:47,445 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:28:47,464 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:47,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:47,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 20:28:47,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271082801] [2020-10-15 20:28:47,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:28:47,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:47,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:28:47,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:28:47,465 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 20:28:49,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:49,033 INFO L93 Difference]: Finished difference Result 153 states and 365 transitions. [2020-10-15 20:28:49,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:28:49,034 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 20:28:49,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:49,035 INFO L225 Difference]: With dead ends: 153 [2020-10-15 20:28:49,035 INFO L226 Difference]: Without dead ends: 147 [2020-10-15 20:28:49,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=929, Invalid=2611, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 20:28:49,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-15 20:28:49,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 104. [2020-10-15 20:28:49,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 20:28:49,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 20:28:49,037 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 20:28:49,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:49,038 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 20:28:49,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:28:49,038 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 20:28:49,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:28:49,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:49,038 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:49,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2020-10-15 20:28:49,246 INFO L429 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:49,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:49,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1412986914, now seen corresponding path program 315 times [2020-10-15 20:28:49,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:49,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855573511] [2020-10-15 20:28:49,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:49,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:49,858 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:49,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855573511] [2020-10-15 20:28:49,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711881386] [2020-10-15 20:28:49,859 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 [2020-10-15 20:28:49,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-15 20:28:49,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:28:49,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:28:49,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:49,939 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:49,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:49,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 20:28:49,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000517682] [2020-10-15 20:28:49,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:28:49,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:49,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:28:49,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:28:49,940 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 20:28:51,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:51,348 INFO L93 Difference]: Finished difference Result 150 states and 359 transitions. [2020-10-15 20:28:51,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:28:51,349 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 20:28:51,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:51,350 INFO L225 Difference]: With dead ends: 150 [2020-10-15 20:28:51,350 INFO L226 Difference]: Without dead ends: 144 [2020-10-15 20:28:51,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=892, Invalid=2530, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 20:28:51,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-15 20:28:51,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 105. [2020-10-15 20:28:51,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 20:28:51,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 20:28:51,353 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 20:28:51,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:51,357 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 20:28:51,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:28:51,357 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 20:28:51,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:28:51,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:51,358 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:51,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2020-10-15 20:28:51,558 INFO L429 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:51,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:51,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1333821762, now seen corresponding path program 316 times [2020-10-15 20:28:51,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:51,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675701551] [2020-10-15 20:28:51,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:51,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:52,166 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:52,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675701551] [2020-10-15 20:28:52,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752330465] [2020-10-15 20:28:52,167 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 [2020-10-15 20:28:52,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:28:52,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:28:52,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:28:52,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:52,258 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:28:52,277 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:52,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:52,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 20:28:52,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354077799] [2020-10-15 20:28:52,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:28:52,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:52,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:28:52,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:28:52,279 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 20:28:53,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:53,994 INFO L93 Difference]: Finished difference Result 149 states and 357 transitions. [2020-10-15 20:28:53,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 20:28:53,995 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 20:28:53,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:53,996 INFO L225 Difference]: With dead ends: 149 [2020-10-15 20:28:53,996 INFO L226 Difference]: Without dead ends: 143 [2020-10-15 20:28:53,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=969, Invalid=2813, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 20:28:53,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-15 20:28:53,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 104. [2020-10-15 20:28:53,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 20:28:53,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 20:28:53,999 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 20:28:53,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:53,999 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 20:28:53,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:28:53,999 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 20:28:54,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:28:54,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:54,000 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:54,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable317 [2020-10-15 20:28:54,201 INFO L429 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:54,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:54,201 INFO L82 PathProgramCache]: Analyzing trace with hash 32032576, now seen corresponding path program 317 times [2020-10-15 20:28:54,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:54,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080587591] [2020-10-15 20:28:54,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:54,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:54,793 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:54,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080587591] [2020-10-15 20:28:54,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007594261] [2020-10-15 20:28:54,794 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 [2020-10-15 20:28:54,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-15 20:28:54,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:28:54,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:28:54,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:54,872 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:54,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:54,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 20:28:54,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575094628] [2020-10-15 20:28:54,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:28:54,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:54,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:28:54,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:28:54,873 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 20:28:56,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:56,407 INFO L93 Difference]: Finished difference Result 146 states and 351 transitions. [2020-10-15 20:28:56,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 20:28:56,409 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 20:28:56,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:56,409 INFO L225 Difference]: With dead ends: 146 [2020-10-15 20:28:56,409 INFO L226 Difference]: Without dead ends: 140 [2020-10-15 20:28:56,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=941, Invalid=2719, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 20:28:56,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-15 20:28:56,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 105. [2020-10-15 20:28:56,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 20:28:56,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 20:28:56,412 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 20:28:56,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:56,412 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 20:28:56,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:28:56,412 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 20:28:56,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:28:56,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:56,413 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:56,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:56,613 INFO L429 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:56,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:56,614 INFO L82 PathProgramCache]: Analyzing trace with hash -778516060, now seen corresponding path program 318 times [2020-10-15 20:28:56,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:56,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716805365] [2020-10-15 20:28:56,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:56,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:57,213 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:57,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716805365] [2020-10-15 20:28:57,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160694823] [2020-10-15 20:28:57,214 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 [2020-10-15 20:28:57,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-15 20:28:57,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:28:57,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:28:57,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:57,318 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:28:57,345 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:57,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:57,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 20:28:57,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003491285] [2020-10-15 20:28:57,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:28:57,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:57,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:28:57,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:28:57,346 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 20:28:59,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:59,222 INFO L93 Difference]: Finished difference Result 145 states and 349 transitions. [2020-10-15 20:28:59,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 20:28:59,224 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 20:28:59,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:59,224 INFO L225 Difference]: With dead ends: 145 [2020-10-15 20:28:59,224 INFO L226 Difference]: Without dead ends: 139 [2020-10-15 20:28:59,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 20:28:59,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-15 20:28:59,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 104. [2020-10-15 20:28:59,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 20:28:59,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 20:28:59,226 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 20:28:59,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:59,226 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 20:28:59,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:28:59,226 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 20:28:59,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:28:59,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:59,227 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:59,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:59,428 INFO L429 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:59,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:59,428 INFO L82 PathProgramCache]: Analyzing trace with hash -726239454, now seen corresponding path program 319 times [2020-10-15 20:28:59,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:59,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098294598] [2020-10-15 20:28:59,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:59,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:00,012 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:00,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098294598] [2020-10-15 20:29:00,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959340753] [2020-10-15 20:29:00,013 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 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 [2020-10-15 20:29:00,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:00,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:29:00,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:29:00,090 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:00,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:29:00,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 20:29:00,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128675260] [2020-10-15 20:29:00,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:29:00,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:29:00,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:29:00,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:29:00,091 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 20:29:01,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:29:01,763 INFO L93 Difference]: Finished difference Result 142 states and 343 transitions. [2020-10-15 20:29:01,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 20:29:01,765 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 20:29:01,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:29:01,765 INFO L225 Difference]: With dead ends: 142 [2020-10-15 20:29:01,765 INFO L226 Difference]: Without dead ends: 136 [2020-10-15 20:29:01,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1006, Invalid=2900, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 20:29:01,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-15 20:29:01,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 105. [2020-10-15 20:29:01,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 20:29:01,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 20:29:01,768 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 20:29:01,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:29:01,768 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 20:29:01,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:29:01,768 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 20:29:01,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:29:01,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:29:01,769 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:29:01,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2020-10-15 20:29:01,969 INFO L429 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:29:01,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:29:01,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1150009990, now seen corresponding path program 320 times [2020-10-15 20:29:01,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:29:01,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955723533] [2020-10-15 20:29:01,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:29:01,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:02,567 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:02,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955723533] [2020-10-15 20:29:02,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013174091] [2020-10-15 20:29:02,568 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 [2020-10-15 20:29:02,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:29:02,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:29:02,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:29:02,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:29:02,675 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:29:02,700 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:02,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:29:02,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 20:29:02,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588496043] [2020-10-15 20:29:02,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:29:02,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:29:02,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:29:02,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:29:02,701 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 20:29:04,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:29:04,737 INFO L93 Difference]: Finished difference Result 141 states and 341 transitions. [2020-10-15 20:29:04,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 20:29:04,740 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 20:29:04,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:29:04,740 INFO L225 Difference]: With dead ends: 141 [2020-10-15 20:29:04,740 INFO L226 Difference]: Without dead ends: 135 [2020-10-15 20:29:04,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1097, Invalid=3193, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 20:29:04,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-15 20:29:04,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 104. [2020-10-15 20:29:04,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 20:29:04,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 20:29:04,742 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 20:29:04,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:29:04,743 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 20:29:04,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:29:04,743 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 20:29:04,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:29:04,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:29:04,743 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:29:04,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2020-10-15 20:29:04,944 INFO L429 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:29:04,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:29:04,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1838331780, now seen corresponding path program 321 times [2020-10-15 20:29:04,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:29:04,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715789176] [2020-10-15 20:29:04,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:29:04,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:05,516 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:05,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715789176] [2020-10-15 20:29:05,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146793180] [2020-10-15 20:29:05,516 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 [2020-10-15 20:29:05,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-15 20:29:05,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:29:05,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:29:05,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:29:05,609 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:05,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:29:05,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 20:29:05,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433717041] [2020-10-15 20:29:05,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:29:05,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:29:05,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:29:05,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:29:05,610 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 20:29:07,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:29:07,404 INFO L93 Difference]: Finished difference Result 138 states and 335 transitions. [2020-10-15 20:29:07,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 20:29:07,406 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 20:29:07,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:29:07,406 INFO L225 Difference]: With dead ends: 138 [2020-10-15 20:29:07,406 INFO L226 Difference]: Without dead ends: 132 [2020-10-15 20:29:07,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1087, Invalid=3073, Unknown=0, NotChecked=0, Total=4160 [2020-10-15 20:29:07,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-15 20:29:07,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 105. [2020-10-15 20:29:07,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 20:29:07,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 20:29:07,409 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 20:29:07,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:29:07,409 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 20:29:07,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:29:07,410 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 20:29:07,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:29:07,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:29:07,410 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:29:07,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2020-10-15 20:29:07,611 INFO L429 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:29:07,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:29:07,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1471443992, now seen corresponding path program 322 times [2020-10-15 20:29:07,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:29:07,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934274936] [2020-10-15 20:29:07,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:29:07,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:08,183 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:08,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934274936] [2020-10-15 20:29:08,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349330461] [2020-10-15 20:29:08,184 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 [2020-10-15 20:29:08,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:29:08,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:29:08,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:29:08,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:29:08,277 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:29:08,308 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:08,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:29:08,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 20:29:08,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303158069] [2020-10-15 20:29:08,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:29:08,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:29:08,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:29:08,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:29:08,310 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 20:29:10,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:29:10,523 INFO L93 Difference]: Finished difference Result 137 states and 333 transitions. [2020-10-15 20:29:10,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 20:29:10,525 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 20:29:10,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:29:10,526 INFO L225 Difference]: With dead ends: 137 [2020-10-15 20:29:10,526 INFO L226 Difference]: Without dead ends: 131 [2020-10-15 20:29:10,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1185, Invalid=3371, Unknown=0, NotChecked=0, Total=4556 [2020-10-15 20:29:10,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-15 20:29:10,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 104. [2020-10-15 20:29:10,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 20:29:10,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 20:29:10,528 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 20:29:10,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:29:10,529 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 20:29:10,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:29:10,529 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 20:29:10,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:29:10,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:29:10,529 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:29:10,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2020-10-15 20:29:10,730 INFO L429 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:29:10,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:29:10,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1206364262, now seen corresponding path program 323 times [2020-10-15 20:29:10,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:29:10,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323445953] [2020-10-15 20:29:10,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:29:10,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:11,303 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:11,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323445953] [2020-10-15 20:29:11,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436085530] [2020-10-15 20:29:11,304 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 [2020-10-15 20:29:11,355 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-15 20:29:11,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:29:11,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:29:11,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:29:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:11,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:29:11,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 20:29:11,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241886602] [2020-10-15 20:29:11,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:29:11,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:29:11,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:29:11,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:29:11,397 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 20:29:13,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:29:13,322 INFO L93 Difference]: Finished difference Result 134 states and 327 transitions. [2020-10-15 20:29:13,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 20:29:13,323 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 20:29:13,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:29:13,324 INFO L225 Difference]: With dead ends: 134 [2020-10-15 20:29:13,324 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 20:29:13,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1184, Invalid=3238, Unknown=0, NotChecked=0, Total=4422 [2020-10-15 20:29:13,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 20:29:13,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 105. [2020-10-15 20:29:13,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 20:29:13,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 20:29:13,326 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 20:29:13,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:29:13,327 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 20:29:13,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:29:13,327 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 20:29:13,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:29:13,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:29:13,327 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:29:13,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:29:13,528 INFO L429 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:29:13,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:29:13,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1831713334, now seen corresponding path program 324 times [2020-10-15 20:29:13,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:29:13,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697807833] [2020-10-15 20:29:13,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:29:13,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:14,106 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:14,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697807833] [2020-10-15 20:29:14,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643384381] [2020-10-15 20:29:14,106 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 [2020-10-15 20:29:14,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-15 20:29:14,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:29:14,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:29:14,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:29:14,207 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:29:14,234 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:14,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:29:14,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 20:29:14,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013553663] [2020-10-15 20:29:14,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:29:14,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:29:14,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:29:14,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:29:14,236 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 20:29:16,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:29:16,605 INFO L93 Difference]: Finished difference Result 133 states and 325 transitions. [2020-10-15 20:29:16,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-15 20:29:16,606 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 20:29:16,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:29:16,607 INFO L225 Difference]: With dead ends: 133 [2020-10-15 20:29:16,607 INFO L226 Difference]: Without dead ends: 127 [2020-10-15 20:29:16,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1289, Invalid=3541, Unknown=0, NotChecked=0, Total=4830 [2020-10-15 20:29:16,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-15 20:29:16,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 104. [2020-10-15 20:29:16,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 20:29:16,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 20:29:16,609 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 20:29:16,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:29:16,610 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 20:29:16,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:29:16,610 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 20:29:16,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:29:16,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:29:16,610 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:29:16,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2020-10-15 20:29:16,811 INFO L429 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:29:16,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:29:16,811 INFO L82 PathProgramCache]: Analyzing trace with hash -215520824, now seen corresponding path program 325 times [2020-10-15 20:29:16,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:29:16,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964183094] [2020-10-15 20:29:16,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:29:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:17,371 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:17,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964183094] [2020-10-15 20:29:17,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680709761] [2020-10-15 20:29:17,372 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 [2020-10-15 20:29:17,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:17,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:29:17,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:29:17,468 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:17,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:29:17,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 20:29:17,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777117852] [2020-10-15 20:29:17,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:29:17,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:29:17,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:29:17,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:29:17,469 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 20:29:19,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:29:19,504 INFO L93 Difference]: Finished difference Result 130 states and 319 transitions. [2020-10-15 20:29:19,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-15 20:29:19,506 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 20:29:19,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:29:19,506 INFO L225 Difference]: With dead ends: 130 [2020-10-15 20:29:19,506 INFO L226 Difference]: Without dead ends: 124 [2020-10-15 20:29:19,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1297, Invalid=3395, Unknown=0, NotChecked=0, Total=4692 [2020-10-15 20:29:19,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-15 20:29:19,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 105. [2020-10-15 20:29:19,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 20:29:19,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 20:29:19,509 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 20:29:19,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:29:19,509 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 20:29:19,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:29:19,510 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 20:29:19,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:29:19,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:29:19,510 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:29:19,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:29:19,711 INFO L429 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:29:19,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:29:19,711 INFO L82 PathProgramCache]: Analyzing trace with hash 304222252, now seen corresponding path program 326 times [2020-10-15 20:29:19,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:29:19,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956756003] [2020-10-15 20:29:19,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:29:19,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:20,279 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:20,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956756003] [2020-10-15 20:29:20,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296178675] [2020-10-15 20:29:20,280 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 [2020-10-15 20:29:20,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:29:20,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:29:20,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:29:20,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:29:20,379 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:29:20,408 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:20,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:29:20,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 20:29:20,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408749812] [2020-10-15 20:29:20,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:29:20,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:29:20,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:29:20,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:29:20,410 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 20:29:22,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:29:22,972 INFO L93 Difference]: Finished difference Result 129 states and 317 transitions. [2020-10-15 20:29:22,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-15 20:29:22,974 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 20:29:22,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:29:22,974 INFO L225 Difference]: With dead ends: 129 [2020-10-15 20:29:22,974 INFO L226 Difference]: Without dead ends: 123 [2020-10-15 20:29:22,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1409, Invalid=3703, Unknown=0, NotChecked=0, Total=5112 [2020-10-15 20:29:22,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-15 20:29:22,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2020-10-15 20:29:22,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 20:29:22,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 20:29:22,977 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 20:29:22,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:29:22,977 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 20:29:22,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:29:22,978 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 20:29:22,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:29:22,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:29:22,978 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:29:23,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2020-10-15 20:29:23,179 INFO L429 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:29:23,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:29:23,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1959533482, now seen corresponding path program 327 times [2020-10-15 20:29:23,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:29:23,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466619254] [2020-10-15 20:29:23,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:29:23,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:23,744 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:23,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466619254] [2020-10-15 20:29:23,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381007294] [2020-10-15 20:29:23,745 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 [2020-10-15 20:29:23,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-15 20:29:23,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:29:23,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:29:23,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:29:23,847 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:23,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:29:23,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 20:29:23,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334172897] [2020-10-15 20:29:23,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:29:23,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:29:23,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:29:23,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:29:23,848 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 20:29:26,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:29:26,044 INFO L93 Difference]: Finished difference Result 126 states and 311 transitions. [2020-10-15 20:29:26,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 20:29:26,046 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 20:29:26,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:29:26,046 INFO L225 Difference]: With dead ends: 126 [2020-10-15 20:29:26,046 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 20:29:26,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1426, Invalid=3544, Unknown=0, NotChecked=0, Total=4970 [2020-10-15 20:29:26,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 20:29:26,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 105. [2020-10-15 20:29:26,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 20:29:26,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 20:29:26,049 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 20:29:26,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:29:26,049 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 20:29:26,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:29:26,050 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 20:29:26,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:29:26,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:29:26,050 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:29:26,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:29:26,251 INFO L429 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:29:26,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:29:26,251 INFO L82 PathProgramCache]: Analyzing trace with hash 239405838, now seen corresponding path program 328 times [2020-10-15 20:29:26,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:29:26,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005129494] [2020-10-15 20:29:26,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:29:26,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:26,823 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:26,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005129494] [2020-10-15 20:29:26,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679377322] [2020-10-15 20:29:26,824 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 [2020-10-15 20:29:26,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:29:26,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:29:26,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:29:26,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:29:26,923 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:29:26,953 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:26,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:29:26,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 20:29:26,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58469808] [2020-10-15 20:29:26,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:29:26,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:29:26,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:29:26,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:29:26,954 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 20:29:29,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:29:29,696 INFO L93 Difference]: Finished difference Result 125 states and 309 transitions. [2020-10-15 20:29:29,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-15 20:29:29,697 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 20:29:29,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:29:29,698 INFO L225 Difference]: With dead ends: 125 [2020-10-15 20:29:29,698 INFO L226 Difference]: Without dead ends: 119 [2020-10-15 20:29:29,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1545, Invalid=3857, Unknown=0, NotChecked=0, Total=5402 [2020-10-15 20:29:29,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-15 20:29:29,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 104. [2020-10-15 20:29:29,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 20:29:29,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 20:29:29,701 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 20:29:29,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:29:29,701 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 20:29:29,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:29:29,701 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 20:29:29,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:29:29,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:29:29,702 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:29:29,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable329 [2020-10-15 20:29:29,902 INFO L429 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:29:29,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:29:29,903 INFO L82 PathProgramCache]: Analyzing trace with hash 710401548, now seen corresponding path program 329 times [2020-10-15 20:29:29,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:29:29,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648074485] [2020-10-15 20:29:29,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:29:29,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:30,468 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:30,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648074485] [2020-10-15 20:29:30,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717464509] [2020-10-15 20:29:30,468 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 [2020-10-15 20:29:30,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-15 20:29:30,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:29:30,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:29:30,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:29:30,567 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:30,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:29:30,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 20:29:30,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360736082] [2020-10-15 20:29:30,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:29:30,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:29:30,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:29:30,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:29:30,569 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 20:29:32,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:29:32,925 INFO L93 Difference]: Finished difference Result 122 states and 303 transitions. [2020-10-15 20:29:32,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-15 20:29:32,927 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 20:29:32,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:29:32,927 INFO L225 Difference]: With dead ends: 122 [2020-10-15 20:29:32,927 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 20:29:32,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1571, Invalid=3685, Unknown=0, NotChecked=0, Total=5256 [2020-10-15 20:29:32,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 20:29:32,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2020-10-15 20:29:32,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 20:29:32,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 20:29:32,930 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 20:29:32,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:29:32,930 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 20:29:32,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:29:32,931 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 20:29:32,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:29:32,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:29:32,931 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:29:33,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:29:33,132 INFO L429 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:29:33,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:29:33,132 INFO L82 PathProgramCache]: Analyzing trace with hash 726488688, now seen corresponding path program 330 times [2020-10-15 20:29:33,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:29:33,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471169636] [2020-10-15 20:29:33,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:29:33,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:33,703 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:33,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471169636] [2020-10-15 20:29:33,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613130320] [2020-10-15 20:29:33,704 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 [2020-10-15 20:29:33,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-15 20:29:33,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:29:33,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:29:33,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:29:33,802 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:29:33,833 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:33,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:29:33,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 20:29:33,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562035498] [2020-10-15 20:29:33,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:29:33,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:29:33,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:29:33,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:29:33,835 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 20:29:36,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:29:36,738 INFO L93 Difference]: Finished difference Result 121 states and 301 transitions. [2020-10-15 20:29:36,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-15 20:29:36,739 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 20:29:36,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:29:36,740 INFO L225 Difference]: With dead ends: 121 [2020-10-15 20:29:36,740 INFO L226 Difference]: Without dead ends: 115 [2020-10-15 20:29:36,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1498 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1697, Invalid=4003, Unknown=0, NotChecked=0, Total=5700 [2020-10-15 20:29:36,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-15 20:29:36,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 104. [2020-10-15 20:29:36,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 20:29:36,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 20:29:36,742 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 20:29:36,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:29:36,742 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 20:29:36,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:29:36,743 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 20:29:36,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:29:36,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:29:36,743 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:29:36,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable331,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:29:36,944 INFO L429 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:29:36,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:29:36,944 INFO L82 PathProgramCache]: Analyzing trace with hash 726978798, now seen corresponding path program 331 times [2020-10-15 20:29:36,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:29:36,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348337057] [2020-10-15 20:29:36,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:29:36,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:37,522 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:37,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348337057] [2020-10-15 20:29:37,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473460599] [2020-10-15 20:29:37,523 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 [2020-10-15 20:29:37,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:37,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:29:37,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:29:37,615 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:37,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:29:37,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 20:29:37,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191726388] [2020-10-15 20:29:37,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:29:37,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:29:37,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:29:37,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:29:37,617 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 20:29:40,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:29:40,054 INFO L93 Difference]: Finished difference Result 137 states and 341 transitions. [2020-10-15 20:29:40,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-15 20:29:40,056 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 20:29:40,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:29:40,056 INFO L225 Difference]: With dead ends: 137 [2020-10-15 20:29:40,057 INFO L226 Difference]: Without dead ends: 131 [2020-10-15 20:29:40,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1499 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1732, Invalid=3818, Unknown=0, NotChecked=0, Total=5550 [2020-10-15 20:29:40,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-15 20:29:40,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 108. [2020-10-15 20:29:40,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-15 20:29:40,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 281 transitions. [2020-10-15 20:29:40,060 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 281 transitions. Word has length 32 [2020-10-15 20:29:40,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:29:40,060 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 281 transitions. [2020-10-15 20:29:40,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:29:40,060 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 281 transitions. [2020-10-15 20:29:40,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:29:40,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:29:40,060 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:29:40,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2020-10-15 20:29:40,261 INFO L429 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:29:40,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:29:40,262 INFO L82 PathProgramCache]: Analyzing trace with hash 726995538, now seen corresponding path program 332 times [2020-10-15 20:29:40,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:29:40,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457510961] [2020-10-15 20:29:40,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:29:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:40,842 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:40,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457510961] [2020-10-15 20:29:40,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377644295] [2020-10-15 20:29:40,842 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 [2020-10-15 20:29:40,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:29:40,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:29:40,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:29:40,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:29:40,939 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:29:40,971 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:40,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:29:40,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 20:29:40,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672413761] [2020-10-15 20:29:40,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:29:40,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:29:40,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:29:40,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:29:40,973 INFO L87 Difference]: Start difference. First operand 108 states and 281 transitions. Second operand 29 states. [2020-10-15 20:29:43,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:29:43,930 INFO L93 Difference]: Finished difference Result 118 states and 297 transitions. [2020-10-15 20:29:43,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-15 20:29:43,932 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 20:29:43,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:29:43,933 INFO L225 Difference]: With dead ends: 118 [2020-10-15 20:29:43,933 INFO L226 Difference]: Without dead ends: 110 [2020-10-15 20:29:43,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1613 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1865, Invalid=4141, Unknown=0, NotChecked=0, Total=6006 [2020-10-15 20:29:43,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-15 20:29:43,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 77. [2020-10-15 20:29:43,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 20:29:43,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 188 transitions. [2020-10-15 20:29:43,935 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 188 transitions. Word has length 32 [2020-10-15 20:29:43,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:29:43,935 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 188 transitions. [2020-10-15 20:29:43,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:29:43,935 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 188 transitions. [2020-10-15 20:29:43,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:29:43,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:29:43,936 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:29:44,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2020-10-15 20:29:44,136 INFO L429 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:29:44,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:29:44,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1262879060, now seen corresponding path program 333 times [2020-10-15 20:29:44,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:29:44,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260988863] [2020-10-15 20:29:44,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:29:44,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:44,725 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:44,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260988863] [2020-10-15 20:29:44,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290929494] [2020-10-15 20:29:44,726 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 [2020-10-15 20:29:44,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-15 20:29:44,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:29:44,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:29:44,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:29:44,825 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:29:44,872 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:44,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:29:44,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 20:29:44,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625424040] [2020-10-15 20:29:44,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:29:44,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:29:44,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:29:44,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:29:44,873 INFO L87 Difference]: Start difference. First operand 77 states and 188 transitions. Second operand 29 states. [2020-10-15 20:29:47,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:29:47,683 INFO L93 Difference]: Finished difference Result 140 states and 343 transitions. [2020-10-15 20:29:47,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-15 20:29:47,685 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 20:29:47,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:29:47,685 INFO L225 Difference]: With dead ends: 140 [2020-10-15 20:29:47,685 INFO L226 Difference]: Without dead ends: 135 [2020-10-15 20:29:47,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1731 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1930, Invalid=4076, Unknown=0, NotChecked=0, Total=6006 [2020-10-15 20:29:47,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-15 20:29:47,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 106. [2020-10-15 20:29:47,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-15 20:29:47,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 273 transitions. [2020-10-15 20:29:47,688 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 273 transitions. Word has length 32 [2020-10-15 20:29:47,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:29:47,688 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 273 transitions. [2020-10-15 20:29:47,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:29:47,688 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 273 transitions. [2020-10-15 20:29:47,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:29:47,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:29:47,688 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:29:47,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2020-10-15 20:29:47,889 INFO L429 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:29:47,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:29:47,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1062041505, now seen corresponding path program 334 times [2020-10-15 20:29:47,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:29:47,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373652615] [2020-10-15 20:29:47,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:29:47,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:48,531 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:48,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373652615] [2020-10-15 20:29:48,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431401623] [2020-10-15 20:29:48,532 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 [2020-10-15 20:29:48,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:29:48,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:29:48,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:29:48,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:29:48,627 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:29:48,674 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:48,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:29:48,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 20:29:48,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50064975] [2020-10-15 20:29:48,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:29:48,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:29:48,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:29:48,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:29:48,676 INFO L87 Difference]: Start difference. First operand 106 states and 273 transitions. Second operand 30 states. [2020-10-15 20:29:51,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:29:51,708 INFO L93 Difference]: Finished difference Result 114 states and 293 transitions. [2020-10-15 20:29:51,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-15 20:29:51,709 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 20:29:51,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:29:51,710 INFO L225 Difference]: With dead ends: 114 [2020-10-15 20:29:51,710 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 20:29:51,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1951, Invalid=4211, Unknown=0, NotChecked=0, Total=6162 [2020-10-15 20:29:51,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 20:29:51,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 78. [2020-10-15 20:29:51,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 20:29:51,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 192 transitions. [2020-10-15 20:29:51,712 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 192 transitions. Word has length 33 [2020-10-15 20:29:51,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:29:51,712 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 192 transitions. [2020-10-15 20:29:51,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:29:51,712 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 192 transitions. [2020-10-15 20:29:51,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:29:51,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:29:51,713 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:29:51,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:29:51,913 INFO L429 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:29:51,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:29:51,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1801619636, now seen corresponding path program 335 times [2020-10-15 20:29:51,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:29:51,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592613868] [2020-10-15 20:29:51,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:29:51,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:52,737 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:52,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592613868] [2020-10-15 20:29:52,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401748663] [2020-10-15 20:29:52,737 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 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 [2020-10-15 20:29:52,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-15 20:29:52,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:29:52,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:29:52,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:29:52,807 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:52,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:29:52,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 20:29:52,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589391728] [2020-10-15 20:29:52,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:29:52,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:29:52,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:29:52,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:29:52,808 INFO L87 Difference]: Start difference. First operand 78 states and 192 transitions. Second operand 29 states. [2020-10-15 20:29:54,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:29:54,068 INFO L93 Difference]: Finished difference Result 120 states and 279 transitions. [2020-10-15 20:29:54,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:29:54,070 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 20:29:54,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:29:54,070 INFO L225 Difference]: With dead ends: 120 [2020-10-15 20:29:54,070 INFO L226 Difference]: Without dead ends: 114 [2020-10-15 20:29:54,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=913, Invalid=1949, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 20:29:54,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-15 20:29:54,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 86. [2020-10-15 20:29:54,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:29:54,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 211 transitions. [2020-10-15 20:29:54,072 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 211 transitions. Word has length 33 [2020-10-15 20:29:54,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:29:54,073 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 211 transitions. [2020-10-15 20:29:54,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:29:54,073 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 211 transitions. [2020-10-15 20:29:54,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:29:54,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:29:54,073 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:29:54,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2020-10-15 20:29:54,274 INFO L429 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:29:54,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:29:54,274 INFO L82 PathProgramCache]: Analyzing trace with hash 2064174256, now seen corresponding path program 336 times [2020-10-15 20:29:54,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:29:54,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197052136] [2020-10-15 20:29:54,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:29:54,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:55,104 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:55,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197052136] [2020-10-15 20:29:55,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337352445] [2020-10-15 20:29:55,105 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 [2020-10-15 20:29:55,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-15 20:29:55,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:29:55,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:29:55,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:29:55,212 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:29:55,229 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:55,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:29:55,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 20:29:55,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231005826] [2020-10-15 20:29:55,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:29:55,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:29:55,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:29:55,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:29:55,230 INFO L87 Difference]: Start difference. First operand 86 states and 211 transitions. Second operand 30 states. [2020-10-15 20:29:56,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:29:56,571 INFO L93 Difference]: Finished difference Result 146 states and 331 transitions. [2020-10-15 20:29:56,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:29:56,573 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 20:29:56,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:29:56,573 INFO L225 Difference]: With dead ends: 146 [2020-10-15 20:29:56,573 INFO L226 Difference]: Without dead ends: 140 [2020-10-15 20:29:56,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=922, Invalid=2158, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 20:29:56,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-15 20:29:56,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 84. [2020-10-15 20:29:56,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-15 20:29:56,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 207 transitions. [2020-10-15 20:29:56,576 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 207 transitions. Word has length 33 [2020-10-15 20:29:56,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:29:56,576 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 207 transitions. [2020-10-15 20:29:56,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:29:56,576 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 207 transitions. [2020-10-15 20:29:56,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:29:56,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:29:56,577 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:29:56,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:29:56,778 INFO L429 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:29:56,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:29:56,778 INFO L82 PathProgramCache]: Analyzing trace with hash -750635858, now seen corresponding path program 337 times [2020-10-15 20:29:56,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:29:56,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324795576] [2020-10-15 20:29:56,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:29:56,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:57,608 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:57,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324795576] [2020-10-15 20:29:57,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106427394] [2020-10-15 20:29:57,608 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 [2020-10-15 20:29:57,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:57,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:29:57,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:29:57,676 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:57,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:29:57,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 20:29:57,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958502912] [2020-10-15 20:29:57,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:29:57,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:29:57,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:29:57,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:29:57,677 INFO L87 Difference]: Start difference. First operand 84 states and 207 transitions. Second operand 29 states. [2020-10-15 20:29:59,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:29:59,124 INFO L93 Difference]: Finished difference Result 147 states and 335 transitions. [2020-10-15 20:29:59,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 20:29:59,126 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 20:29:59,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:29:59,126 INFO L225 Difference]: With dead ends: 147 [2020-10-15 20:29:59,126 INFO L226 Difference]: Without dead ends: 141 [2020-10-15 20:29:59,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=922, Invalid=2270, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 20:29:59,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-15 20:29:59,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 87. [2020-10-15 20:29:59,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:29:59,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 215 transitions. [2020-10-15 20:29:59,129 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 215 transitions. Word has length 33 [2020-10-15 20:29:59,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:29:59,129 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 215 transitions. [2020-10-15 20:29:59,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:29:59,129 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 215 transitions. [2020-10-15 20:29:59,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:29:59,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:29:59,129 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:29:59,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2020-10-15 20:29:59,330 INFO L429 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:29:59,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:29:59,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1720423186, now seen corresponding path program 338 times [2020-10-15 20:29:59,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:29:59,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842342027] [2020-10-15 20:29:59,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:29:59,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:30:00,162 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:00,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842342027] [2020-10-15 20:30:00,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716446725] [2020-10-15 20:30:00,163 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 [2020-10-15 20:30:00,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:30:00,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:30:00,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:30:00,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:30:00,258 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:30:00,277 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:00,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:30:00,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 20:30:00,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105934338] [2020-10-15 20:30:00,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:30:00,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:30:00,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:30:00,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:30:00,278 INFO L87 Difference]: Start difference. First operand 87 states and 215 transitions. Second operand 30 states. [2020-10-15 20:30:01,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:30:01,790 INFO L93 Difference]: Finished difference Result 169 states and 379 transitions. [2020-10-15 20:30:01,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:30:01,791 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 20:30:01,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:30:01,792 INFO L225 Difference]: With dead ends: 169 [2020-10-15 20:30:01,792 INFO L226 Difference]: Without dead ends: 163 [2020-10-15 20:30:01,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=964, Invalid=2458, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 20:30:01,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-15 20:30:01,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 86. [2020-10-15 20:30:01,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:30:01,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 213 transitions. [2020-10-15 20:30:01,794 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 213 transitions. Word has length 33 [2020-10-15 20:30:01,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:30:01,794 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 213 transitions. [2020-10-15 20:30:01,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:30:01,795 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 213 transitions. [2020-10-15 20:30:01,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:30:01,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:30:01,795 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:30:01,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:30:01,996 INFO L429 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:30:01,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:30:01,996 INFO L82 PathProgramCache]: Analyzing trace with hash 895148688, now seen corresponding path program 339 times [2020-10-15 20:30:01,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:30:01,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537926620] [2020-10-15 20:30:01,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:30:02,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:30:02,774 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:02,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537926620] [2020-10-15 20:30:02,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457469277] [2020-10-15 20:30:02,775 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 [2020-10-15 20:30:02,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-15 20:30:02,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:30:02,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:30:02,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:30:02,857 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:02,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:30:02,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 20:30:02,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417063590] [2020-10-15 20:30:02,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:30:02,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:30:02,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:30:02,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:30:02,858 INFO L87 Difference]: Start difference. First operand 86 states and 213 transitions. Second operand 29 states. [2020-10-15 20:30:04,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:30:04,404 INFO L93 Difference]: Finished difference Result 169 states and 381 transitions. [2020-10-15 20:30:04,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:30:04,406 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 20:30:04,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:30:04,406 INFO L225 Difference]: With dead ends: 169 [2020-10-15 20:30:04,406 INFO L226 Difference]: Without dead ends: 163 [2020-10-15 20:30:04,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=978, Invalid=2562, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 20:30:04,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-15 20:30:04,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 89. [2020-10-15 20:30:04,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-15 20:30:04,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 221 transitions. [2020-10-15 20:30:04,414 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 221 transitions. Word has length 33 [2020-10-15 20:30:04,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:30:04,414 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 221 transitions. [2020-10-15 20:30:04,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:30:04,414 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 221 transitions. [2020-10-15 20:30:04,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:30:04,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:30:04,414 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:30:04,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:30:04,615 INFO L429 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:30:04,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:30:04,616 INFO L82 PathProgramCache]: Analyzing trace with hash -143619596, now seen corresponding path program 340 times [2020-10-15 20:30:04,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:30:04,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808185082] [2020-10-15 20:30:04,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:30:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:30:05,406 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:05,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808185082] [2020-10-15 20:30:05,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689861760] [2020-10-15 20:30:05,406 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 [2020-10-15 20:30:05,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:30:05,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:30:05,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:30:05,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:30:05,503 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:30:05,531 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:05,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:30:05,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 20:30:05,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2282305] [2020-10-15 20:30:05,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:30:05,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:30:05,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:30:05,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:30:05,532 INFO L87 Difference]: Start difference. First operand 89 states and 221 transitions. Second operand 30 states. [2020-10-15 20:30:07,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:30:07,213 INFO L93 Difference]: Finished difference Result 166 states and 375 transitions. [2020-10-15 20:30:07,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:30:07,215 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 20:30:07,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:30:07,215 INFO L225 Difference]: With dead ends: 166 [2020-10-15 20:30:07,215 INFO L226 Difference]: Without dead ends: 160 [2020-10-15 20:30:07,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=979, Invalid=2681, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 20:30:07,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-15 20:30:07,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 88. [2020-10-15 20:30:07,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 20:30:07,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 219 transitions. [2020-10-15 20:30:07,218 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 219 transitions. Word has length 33 [2020-10-15 20:30:07,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:30:07,218 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 219 transitions. [2020-10-15 20:30:07,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:30:07,218 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 219 transitions. [2020-10-15 20:30:07,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:30:07,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:30:07,218 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:30:07,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable341 [2020-10-15 20:30:07,419 INFO L429 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:30:07,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:30:07,420 INFO L82 PathProgramCache]: Analyzing trace with hash 271163634, now seen corresponding path program 341 times [2020-10-15 20:30:07,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:30:07,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214926587] [2020-10-15 20:30:07,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:30:07,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:30:08,185 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:08,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214926587] [2020-10-15 20:30:08,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520893205] [2020-10-15 20:30:08,185 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 [2020-10-15 20:30:08,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-15 20:30:08,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:30:08,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:30:08,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:30:08,266 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:08,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:30:08,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 20:30:08,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59039727] [2020-10-15 20:30:08,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:30:08,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:30:08,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:30:08,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:30:08,267 INFO L87 Difference]: Start difference. First operand 88 states and 219 transitions. Second operand 29 states. [2020-10-15 20:30:09,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:30:09,947 INFO L93 Difference]: Finished difference Result 167 states and 379 transitions. [2020-10-15 20:30:09,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 20:30:09,949 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 20:30:09,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:30:09,950 INFO L225 Difference]: With dead ends: 167 [2020-10-15 20:30:09,950 INFO L226 Difference]: Without dead ends: 161 [2020-10-15 20:30:09,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1008, Invalid=2774, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 20:30:09,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-15 20:30:09,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 91. [2020-10-15 20:30:09,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 20:30:09,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 227 transitions. [2020-10-15 20:30:09,952 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 227 transitions. Word has length 33 [2020-10-15 20:30:09,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:30:09,952 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 227 transitions. [2020-10-15 20:30:09,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:30:09,953 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 227 transitions. [2020-10-15 20:30:09,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:30:09,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:30:09,953 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:30:10,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2020-10-15 20:30:10,154 INFO L429 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:30:10,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:30:10,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1450585770, now seen corresponding path program 342 times [2020-10-15 20:30:10,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:30:10,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321166334] [2020-10-15 20:30:10,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:30:10,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:30:10,931 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:10,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321166334] [2020-10-15 20:30:10,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648315356] [2020-10-15 20:30:10,932 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 [2020-10-15 20:30:10,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-15 20:30:10,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:30:10,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:30:10,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:30:11,034 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:30:11,056 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:11,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:30:11,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 20:30:11,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101871181] [2020-10-15 20:30:11,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:30:11,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:30:11,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:30:11,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:30:11,057 INFO L87 Difference]: Start difference. First operand 91 states and 227 transitions. Second operand 30 states. [2020-10-15 20:30:12,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:30:12,916 INFO L93 Difference]: Finished difference Result 164 states and 373 transitions. [2020-10-15 20:30:12,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 20:30:12,917 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 20:30:12,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:30:12,918 INFO L225 Difference]: With dead ends: 164 [2020-10-15 20:30:12,918 INFO L226 Difference]: Without dead ends: 158 [2020-10-15 20:30:12,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1010, Invalid=2896, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 20:30:12,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-15 20:30:12,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 90. [2020-10-15 20:30:12,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-15 20:30:12,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 225 transitions. [2020-10-15 20:30:12,920 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 225 transitions. Word has length 33 [2020-10-15 20:30:12,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:30:12,921 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 225 transitions. [2020-10-15 20:30:12,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:30:12,921 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 225 transitions. [2020-10-15 20:30:12,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:30:12,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:30:12,921 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:30:13,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2020-10-15 20:30:13,122 INFO L429 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:30:13,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:30:13,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1660456916, now seen corresponding path program 343 times [2020-10-15 20:30:13,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:30:13,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560965791] [2020-10-15 20:30:13,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:30:13,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:30:13,878 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:13,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560965791] [2020-10-15 20:30:13,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430724926] [2020-10-15 20:30:13,878 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 [2020-10-15 20:30:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:30:13,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:30:13,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:30:13,963 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:13,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:30:13,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 20:30:13,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235150982] [2020-10-15 20:30:13,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:30:13,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:30:13,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:30:13,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:30:13,965 INFO L87 Difference]: Start difference. First operand 90 states and 225 transitions. Second operand 29 states. [2020-10-15 20:30:15,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:30:15,791 INFO L93 Difference]: Finished difference Result 165 states and 377 transitions. [2020-10-15 20:30:15,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 20:30:15,792 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 20:30:15,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:30:15,793 INFO L225 Difference]: With dead ends: 165 [2020-10-15 20:30:15,793 INFO L226 Difference]: Without dead ends: 159 [2020-10-15 20:30:15,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1054, Invalid=2978, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 20:30:15,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-15 20:30:15,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 93. [2020-10-15 20:30:15,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 20:30:15,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 233 transitions. [2020-10-15 20:30:15,796 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 233 transitions. Word has length 33 [2020-10-15 20:30:15,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:30:15,796 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 233 transitions. [2020-10-15 20:30:15,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:30:15,796 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 233 transitions. [2020-10-15 20:30:15,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:30:15,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:30:15,796 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:30:15,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2020-10-15 20:30:15,997 INFO L429 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:30:15,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:30:15,998 INFO L82 PathProgramCache]: Analyzing trace with hash 112298296, now seen corresponding path program 344 times [2020-10-15 20:30:15,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:30:15,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343646629] [2020-10-15 20:30:15,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:30:16,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:30:16,753 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:16,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343646629] [2020-10-15 20:30:16,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352099654] [2020-10-15 20:30:16,754 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 [2020-10-15 20:30:16,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:30:16,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:30:16,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:30:16,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:30:16,860 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:30:16,885 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:16,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:30:16,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 20:30:16,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912907293] [2020-10-15 20:30:16,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:30:16,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:30:16,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:30:16,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:30:16,886 INFO L87 Difference]: Start difference. First operand 93 states and 233 transitions. Second operand 30 states. [2020-10-15 20:30:18,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:30:18,931 INFO L93 Difference]: Finished difference Result 162 states and 371 transitions. [2020-10-15 20:30:18,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 20:30:18,933 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 20:30:18,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:30:18,933 INFO L225 Difference]: With dead ends: 162 [2020-10-15 20:30:18,934 INFO L226 Difference]: Without dead ends: 156 [2020-10-15 20:30:18,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1057, Invalid=3103, Unknown=0, NotChecked=0, Total=4160 [2020-10-15 20:30:18,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-15 20:30:18,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 92. [2020-10-15 20:30:18,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 20:30:18,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 231 transitions. [2020-10-15 20:30:18,936 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 231 transitions. Word has length 33 [2020-10-15 20:30:18,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:30:18,936 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 231 transitions. [2020-10-15 20:30:18,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:30:18,936 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 231 transitions. [2020-10-15 20:30:18,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:30:18,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:30:18,936 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:30:19,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 342 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2020-10-15 20:30:19,137 INFO L429 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:30:19,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:30:19,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1189490890, now seen corresponding path program 345 times [2020-10-15 20:30:19,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:30:19,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130375783] [2020-10-15 20:30:19,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:30:19,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:30:19,857 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:19,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130375783] [2020-10-15 20:30:19,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644912612] [2020-10-15 20:30:19,858 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 [2020-10-15 20:30:19,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-15 20:30:19,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:30:19,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:30:19,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:30:19,945 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:19,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:30:19,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 20:30:19,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200991955] [2020-10-15 20:30:19,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:30:19,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:30:19,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:30:19,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:30:19,951 INFO L87 Difference]: Start difference. First operand 92 states and 231 transitions. Second operand 29 states. [2020-10-15 20:30:21,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:30:21,897 INFO L93 Difference]: Finished difference Result 163 states and 375 transitions. [2020-10-15 20:30:21,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 20:30:21,899 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 20:30:21,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:30:21,900 INFO L225 Difference]: With dead ends: 163 [2020-10-15 20:30:21,900 INFO L226 Difference]: Without dead ends: 157 [2020-10-15 20:30:21,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1116, Invalid=3174, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 20:30:21,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-15 20:30:21,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 95. [2020-10-15 20:30:21,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-15 20:30:21,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 239 transitions. [2020-10-15 20:30:21,903 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 239 transitions. Word has length 33 [2020-10-15 20:30:21,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:30:21,903 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 239 transitions. [2020-10-15 20:30:21,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:30:21,903 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 239 transitions. [2020-10-15 20:30:21,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:30:21,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:30:21,903 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:30:22,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2020-10-15 20:30:22,104 INFO L429 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:30:22,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:30:22,105 INFO L82 PathProgramCache]: Analyzing trace with hash -2000039526, now seen corresponding path program 346 times [2020-10-15 20:30:22,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:30:22,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653225853] [2020-10-15 20:30:22,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:30:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:30:22,842 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:22,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653225853] [2020-10-15 20:30:22,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586079202] [2020-10-15 20:30:22,843 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 [2020-10-15 20:30:22,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:30:22,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:30:22,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:30:22,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:30:22,944 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:30:22,971 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:22,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:30:22,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 20:30:22,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597839572] [2020-10-15 20:30:22,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:30:22,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:30:22,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:30:22,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:30:22,972 INFO L87 Difference]: Start difference. First operand 95 states and 239 transitions. Second operand 30 states. [2020-10-15 20:30:25,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:30:25,203 INFO L93 Difference]: Finished difference Result 160 states and 369 transitions. [2020-10-15 20:30:25,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 20:30:25,205 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 20:30:25,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:30:25,206 INFO L225 Difference]: With dead ends: 160 [2020-10-15 20:30:25,206 INFO L226 Difference]: Without dead ends: 154 [2020-10-15 20:30:25,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1120, Invalid=3302, Unknown=0, NotChecked=0, Total=4422 [2020-10-15 20:30:25,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-15 20:30:25,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 94. [2020-10-15 20:30:25,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 20:30:25,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 237 transitions. [2020-10-15 20:30:25,208 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 237 transitions. Word has length 33 [2020-10-15 20:30:25,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:30:25,208 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 237 transitions. [2020-10-15 20:30:25,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:30:25,208 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 237 transitions. [2020-10-15 20:30:25,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:30:25,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:30:25,209 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:30:25,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:30:25,409 INFO L429 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:30:25,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:30:25,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1947762920, now seen corresponding path program 347 times [2020-10-15 20:30:25,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:30:25,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256118927] [2020-10-15 20:30:25,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:30:25,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:30:26,209 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:26,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256118927] [2020-10-15 20:30:26,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248441794] [2020-10-15 20:30:26,209 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 [2020-10-15 20:30:26,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-15 20:30:26,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:30:26,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:30:26,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:30:26,298 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:26,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:30:26,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 20:30:26,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253429583] [2020-10-15 20:30:26,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:30:26,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:30:26,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:30:26,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:30:26,299 INFO L87 Difference]: Start difference. First operand 94 states and 237 transitions. Second operand 29 states. [2020-10-15 20:30:28,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:30:28,393 INFO L93 Difference]: Finished difference Result 161 states and 373 transitions. [2020-10-15 20:30:28,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 20:30:28,395 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 20:30:28,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:30:28,396 INFO L225 Difference]: With dead ends: 161 [2020-10-15 20:30:28,396 INFO L226 Difference]: Without dead ends: 155 [2020-10-15 20:30:28,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1194, Invalid=3362, Unknown=0, NotChecked=0, Total=4556 [2020-10-15 20:30:28,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-15 20:30:28,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 97. [2020-10-15 20:30:28,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-15 20:30:28,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 245 transitions. [2020-10-15 20:30:28,399 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 245 transitions. Word has length 33 [2020-10-15 20:30:28,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:30:28,399 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 245 transitions. [2020-10-15 20:30:28,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:30:28,399 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 245 transitions. [2020-10-15 20:30:28,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:30:28,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:30:28,399 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:30:28,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2020-10-15 20:30:28,600 INFO L429 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:30:28,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:30:28,601 INFO L82 PathProgramCache]: Analyzing trace with hash -71513476, now seen corresponding path program 348 times [2020-10-15 20:30:28,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:30:28,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326954308] [2020-10-15 20:30:28,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:30:28,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:30:29,315 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:29,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326954308] [2020-10-15 20:30:29,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543815802] [2020-10-15 20:30:29,316 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 [2020-10-15 20:30:29,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-15 20:30:29,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:30:29,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:30:29,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:30:29,432 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:30:29,459 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:29,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:30:29,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 20:30:29,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515104582] [2020-10-15 20:30:29,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:30:29,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:30:29,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:30:29,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:30:29,461 INFO L87 Difference]: Start difference. First operand 97 states and 245 transitions. Second operand 30 states. [2020-10-15 20:30:31,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:30:31,881 INFO L93 Difference]: Finished difference Result 158 states and 367 transitions. [2020-10-15 20:30:31,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 20:30:31,883 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 20:30:31,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:30:31,883 INFO L225 Difference]: With dead ends: 158 [2020-10-15 20:30:31,883 INFO L226 Difference]: Without dead ends: 152 [2020-10-15 20:30:31,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1199, Invalid=3493, Unknown=0, NotChecked=0, Total=4692 [2020-10-15 20:30:31,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-15 20:30:31,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 96. [2020-10-15 20:30:31,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-15 20:30:31,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 243 transitions. [2020-10-15 20:30:31,890 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 243 transitions. Word has length 33 [2020-10-15 20:30:31,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:30:31,890 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 243 transitions. [2020-10-15 20:30:31,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:30:31,890 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 243 transitions. [2020-10-15 20:30:31,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:30:31,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:30:31,890 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:30:32,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2020-10-15 20:30:32,091 INFO L429 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:30:32,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:30:32,092 INFO L82 PathProgramCache]: Analyzing trace with hash 616808314, now seen corresponding path program 349 times [2020-10-15 20:30:32,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:30:32,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389286090] [2020-10-15 20:30:32,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:30:32,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:30:32,795 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:32,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389286090] [2020-10-15 20:30:32,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427796976] [2020-10-15 20:30:32,796 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 [2020-10-15 20:30:32,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:30:32,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:30:32,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:30:32,883 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:32,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:30:32,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 20:30:32,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501396942] [2020-10-15 20:30:32,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:30:32,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:30:32,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:30:32,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:30:32,884 INFO L87 Difference]: Start difference. First operand 96 states and 243 transitions. Second operand 29 states. [2020-10-15 20:30:35,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:30:35,149 INFO L93 Difference]: Finished difference Result 159 states and 371 transitions. [2020-10-15 20:30:35,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-15 20:30:35,151 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 20:30:35,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:30:35,152 INFO L225 Difference]: With dead ends: 159 [2020-10-15 20:30:35,152 INFO L226 Difference]: Without dead ends: 153 [2020-10-15 20:30:35,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1288, Invalid=3542, Unknown=0, NotChecked=0, Total=4830 [2020-10-15 20:30:35,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-15 20:30:35,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 99. [2020-10-15 20:30:35,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 20:30:35,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 251 transitions. [2020-10-15 20:30:35,155 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 251 transitions. Word has length 33 [2020-10-15 20:30:35,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:30:35,155 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 251 transitions. [2020-10-15 20:30:35,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:30:35,155 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 251 transitions. [2020-10-15 20:30:35,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:30:35,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:30:35,155 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:30:35,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:30:35,356 INFO L429 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:30:35,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:30:35,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1601999838, now seen corresponding path program 350 times [2020-10-15 20:30:35,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:30:35,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034719900] [2020-10-15 20:30:35,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:30:35,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:30:36,074 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:36,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034719900] [2020-10-15 20:30:36,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309368816] [2020-10-15 20:30:36,075 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 [2020-10-15 20:30:36,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:30:36,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:30:36,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:30:36,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:30:36,179 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:30:36,210 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:36,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:30:36,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 20:30:36,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233404383] [2020-10-15 20:30:36,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:30:36,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:30:36,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:30:36,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:30:36,211 INFO L87 Difference]: Start difference. First operand 99 states and 251 transitions. Second operand 30 states. [2020-10-15 20:30:38,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:30:38,852 INFO L93 Difference]: Finished difference Result 156 states and 365 transitions. [2020-10-15 20:30:38,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-15 20:30:38,854 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 20:30:38,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:30:38,855 INFO L225 Difference]: With dead ends: 156 [2020-10-15 20:30:38,855 INFO L226 Difference]: Without dead ends: 150 [2020-10-15 20:30:38,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1294, Invalid=3676, Unknown=0, NotChecked=0, Total=4970 [2020-10-15 20:30:38,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-15 20:30:38,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 98. [2020-10-15 20:30:38,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 20:30:38,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 249 transitions. [2020-10-15 20:30:38,858 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 249 transitions. Word has length 33 [2020-10-15 20:30:38,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:30:38,858 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 249 transitions. [2020-10-15 20:30:38,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:30:38,858 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 249 transitions. [2020-10-15 20:30:38,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:30:38,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:30:38,858 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:30:39,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:30:39,059 INFO L429 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:30:39,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:30:39,059 INFO L82 PathProgramCache]: Analyzing trace with hash -15159204, now seen corresponding path program 351 times [2020-10-15 20:30:39,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:30:39,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604056227] [2020-10-15 20:30:39,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:30:39,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:30:39,779 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:39,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604056227] [2020-10-15 20:30:39,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404931782] [2020-10-15 20:30:39,779 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 [2020-10-15 20:30:39,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-15 20:30:39,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:30:39,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:30:39,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:30:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:39,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:30:39,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 20:30:39,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969358832] [2020-10-15 20:30:39,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:30:39,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:30:39,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:30:39,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:30:39,883 INFO L87 Difference]: Start difference. First operand 98 states and 249 transitions. Second operand 29 states. [2020-10-15 20:30:42,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:30:42,287 INFO L93 Difference]: Finished difference Result 157 states and 369 transitions. [2020-10-15 20:30:42,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 20:30:42,289 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 20:30:42,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:30:42,289 INFO L225 Difference]: With dead ends: 157 [2020-10-15 20:30:42,289 INFO L226 Difference]: Without dead ends: 151 [2020-10-15 20:30:42,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1355 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1398, Invalid=3714, Unknown=0, NotChecked=0, Total=5112 [2020-10-15 20:30:42,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-15 20:30:42,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 101. [2020-10-15 20:30:42,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 20:30:42,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 257 transitions. [2020-10-15 20:30:42,292 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 257 transitions. Word has length 33 [2020-10-15 20:30:42,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:30:42,292 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 257 transitions. [2020-10-15 20:30:42,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:30:42,292 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 257 transitions. [2020-10-15 20:30:42,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:30:42,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:30:42,292 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:30:42,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:30:42,493 INFO L429 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:30:42,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:30:42,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1241730496, now seen corresponding path program 352 times [2020-10-15 20:30:42,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:30:42,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607046051] [2020-10-15 20:30:42,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:30:42,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:30:43,203 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:43,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607046051] [2020-10-15 20:30:43,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523840383] [2020-10-15 20:30:43,204 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 [2020-10-15 20:30:43,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:30:43,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:30:43,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:30:43,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:30:43,315 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:30:43,344 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:43,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:30:43,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 20:30:43,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361487420] [2020-10-15 20:30:43,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:30:43,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:30:43,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:30:43,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:30:43,346 INFO L87 Difference]: Start difference. First operand 101 states and 257 transitions. Second operand 30 states. [2020-10-15 20:30:46,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:30:46,176 INFO L93 Difference]: Finished difference Result 154 states and 363 transitions. [2020-10-15 20:30:46,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-15 20:30:46,178 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 20:30:46,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:30:46,178 INFO L225 Difference]: With dead ends: 154 [2020-10-15 20:30:46,178 INFO L226 Difference]: Without dead ends: 148 [2020-10-15 20:30:46,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1405, Invalid=3851, Unknown=0, NotChecked=0, Total=5256 [2020-10-15 20:30:46,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-15 20:30:46,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 100. [2020-10-15 20:30:46,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-15 20:30:46,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 255 transitions. [2020-10-15 20:30:46,181 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 255 transitions. Word has length 33 [2020-10-15 20:30:46,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:30:46,181 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 255 transitions. [2020-10-15 20:30:46,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:30:46,181 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 255 transitions. [2020-10-15 20:30:46,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:30:46,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:30:46,181 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:30:46,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2020-10-15 20:30:46,382 INFO L429 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:30:46,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:30:46,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1437044290, now seen corresponding path program 353 times [2020-10-15 20:30:46,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:30:46,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862213064] [2020-10-15 20:30:46,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:30:46,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:30:47,096 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:47,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862213064] [2020-10-15 20:30:47,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326338528] [2020-10-15 20:30:47,097 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 [2020-10-15 20:30:47,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-15 20:30:47,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:30:47,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:30:47,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:30:47,195 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:47,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:30:47,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 20:30:47,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003285015] [2020-10-15 20:30:47,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:30:47,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:30:47,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:30:47,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:30:47,197 INFO L87 Difference]: Start difference. First operand 100 states and 255 transitions. Second operand 29 states. [2020-10-15 20:30:49,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:30:49,772 INFO L93 Difference]: Finished difference Result 155 states and 367 transitions. [2020-10-15 20:30:49,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-15 20:30:49,774 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 20:30:49,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:30:49,774 INFO L225 Difference]: With dead ends: 155 [2020-10-15 20:30:49,774 INFO L226 Difference]: Without dead ends: 149 [2020-10-15 20:30:49,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1524, Invalid=3878, Unknown=0, NotChecked=0, Total=5402 [2020-10-15 20:30:49,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-15 20:30:49,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 103. [2020-10-15 20:30:49,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-15 20:30:49,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 263 transitions. [2020-10-15 20:30:49,777 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 263 transitions. Word has length 33 [2020-10-15 20:30:49,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:30:49,777 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 263 transitions. [2020-10-15 20:30:49,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:30:49,777 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 263 transitions. [2020-10-15 20:30:49,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:30:49,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:30:49,778 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:30:49,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2020-10-15 20:30:49,978 INFO L429 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:30:49,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:30:49,979 INFO L82 PathProgramCache]: Analyzing trace with hash -917301214, now seen corresponding path program 354 times [2020-10-15 20:30:49,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:30:49,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761527960] [2020-10-15 20:30:49,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:30:49,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:30:50,705 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:50,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761527960] [2020-10-15 20:30:50,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978093041] [2020-10-15 20:30:50,706 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 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 [2020-10-15 20:30:50,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-15 20:30:50,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:30:50,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:30:50,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:30:50,816 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:30:50,849 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:50,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:30:50,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 20:30:50,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032910301] [2020-10-15 20:30:50,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:30:50,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:30:50,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:30:50,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:30:50,850 INFO L87 Difference]: Start difference. First operand 103 states and 263 transitions. Second operand 30 states. [2020-10-15 20:30:53,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:30:53,989 INFO L93 Difference]: Finished difference Result 152 states and 361 transitions. [2020-10-15 20:30:53,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-15 20:30:53,991 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 20:30:53,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:30:53,991 INFO L225 Difference]: With dead ends: 152 [2020-10-15 20:30:53,991 INFO L226 Difference]: Without dead ends: 146 [2020-10-15 20:30:53,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1532, Invalid=4018, Unknown=0, NotChecked=0, Total=5550 [2020-10-15 20:30:53,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-15 20:30:53,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 102. [2020-10-15 20:30:53,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-15 20:30:53,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 261 transitions. [2020-10-15 20:30:53,993 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 261 transitions. Word has length 33 [2020-10-15 20:30:53,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:30:53,994 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 261 transitions. [2020-10-15 20:30:53,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:30:53,994 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 261 transitions. [2020-10-15 20:30:53,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:30:53,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:30:53,994 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:30:54,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable355,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:30:54,195 INFO L429 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:30:54,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:30:54,195 INFO L82 PathProgramCache]: Analyzing trace with hash 738010016, now seen corresponding path program 355 times [2020-10-15 20:30:54,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:30:54,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118680474] [2020-10-15 20:30:54,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:30:54,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:30:54,906 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:54,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118680474] [2020-10-15 20:30:54,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845206198] [2020-10-15 20:30:54,906 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 [2020-10-15 20:30:54,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:30:54,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:30:54,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:30:55,013 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:55,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:30:55,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 20:30:55,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781276887] [2020-10-15 20:30:55,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:30:55,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:30:55,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:30:55,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:30:55,015 INFO L87 Difference]: Start difference. First operand 102 states and 261 transitions. Second operand 29 states. [2020-10-15 20:30:57,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:30:57,715 INFO L93 Difference]: Finished difference Result 153 states and 365 transitions. [2020-10-15 20:30:57,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-15 20:30:57,717 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 20:30:57,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:30:57,718 INFO L225 Difference]: With dead ends: 153 [2020-10-15 20:30:57,718 INFO L226 Difference]: Without dead ends: 147 [2020-10-15 20:30:57,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1666, Invalid=4034, Unknown=0, NotChecked=0, Total=5700 [2020-10-15 20:30:57,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-15 20:30:57,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 105. [2020-10-15 20:30:57,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 20:30:57,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 20:30:57,720 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 33 [2020-10-15 20:30:57,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:30:57,720 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 20:30:57,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:30:57,720 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 20:30:57,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:30:57,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:30:57,721 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:30:57,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2020-10-15 20:30:57,921 INFO L429 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:30:57,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:30:57,922 INFO L82 PathProgramCache]: Analyzing trace with hash -982117628, now seen corresponding path program 356 times [2020-10-15 20:30:57,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:30:57,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533255540] [2020-10-15 20:30:57,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:30:57,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:30:58,640 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:58,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533255540] [2020-10-15 20:30:58,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464520787] [2020-10-15 20:30:58,641 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 [2020-10-15 20:30:58,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:30:58,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:30:58,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:30:58,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:30:58,748 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:30:58,790 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:58,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:30:58,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 20:30:58,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716556078] [2020-10-15 20:30:58,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:30:58,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:30:58,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:30:58,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:30:58,791 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 30 states. [2020-10-15 20:31:02,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:31:02,039 INFO L93 Difference]: Finished difference Result 150 states and 359 transitions. [2020-10-15 20:31:02,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-15 20:31:02,041 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 20:31:02,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:31:02,041 INFO L225 Difference]: With dead ends: 150 [2020-10-15 20:31:02,041 INFO L226 Difference]: Without dead ends: 144 [2020-10-15 20:31:02,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1599 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1675, Invalid=4177, Unknown=0, NotChecked=0, Total=5852 [2020-10-15 20:31:02,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-15 20:31:02,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 104. [2020-10-15 20:31:02,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 20:31:02,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 20:31:02,044 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 33 [2020-10-15 20:31:02,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:31:02,044 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 20:31:02,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:31:02,044 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 20:31:02,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:31:02,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:31:02,045 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:31:02,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:31:02,245 INFO L429 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:31:02,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:31:02,246 INFO L82 PathProgramCache]: Analyzing trace with hash -511121918, now seen corresponding path program 357 times [2020-10-15 20:31:02,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:31:02,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844567630] [2020-10-15 20:31:02,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:31:02,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:31:02,951 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:02,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844567630] [2020-10-15 20:31:02,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474876018] [2020-10-15 20:31:02,952 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 [2020-10-15 20:31:03,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-15 20:31:03,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:31:03,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:31:03,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:31:03,064 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:03,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:31:03,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 20:31:03,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886853123] [2020-10-15 20:31:03,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:31:03,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:31:03,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:31:03,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=633, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:31:03,066 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 29 states. [2020-10-15 20:31:05,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:31:05,948 INFO L93 Difference]: Finished difference Result 151 states and 363 transitions. [2020-10-15 20:31:05,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-15 20:31:05,951 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 20:31:05,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:31:05,951 INFO L225 Difference]: With dead ends: 151 [2020-10-15 20:31:05,952 INFO L226 Difference]: Without dead ends: 145 [2020-10-15 20:31:05,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1721 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1824, Invalid=4182, Unknown=0, NotChecked=0, Total=6006 [2020-10-15 20:31:05,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-15 20:31:05,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 107. [2020-10-15 20:31:05,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-15 20:31:05,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 275 transitions. [2020-10-15 20:31:05,955 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 275 transitions. Word has length 33 [2020-10-15 20:31:05,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:31:05,955 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 275 transitions. [2020-10-15 20:31:05,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:31:05,955 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 275 transitions. [2020-10-15 20:31:05,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:31:05,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:31:05,955 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:31:06,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2020-10-15 20:31:06,156 INFO L429 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:31:06,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:31:06,157 INFO L82 PathProgramCache]: Analyzing trace with hash -495034778, now seen corresponding path program 358 times [2020-10-15 20:31:06,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:31:06,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179365860] [2020-10-15 20:31:06,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:31:06,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:31:06,882 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:06,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179365860] [2020-10-15 20:31:06,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132571080] [2020-10-15 20:31:06,882 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 [2020-10-15 20:31:06,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:31:06,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:31:06,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:31:06,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:31:06,984 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:31:07,022 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:07,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:31:07,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 20:31:07,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379780132] [2020-10-15 20:31:07,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:31:07,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:31:07,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:31:07,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:31:07,024 INFO L87 Difference]: Start difference. First operand 107 states and 275 transitions. Second operand 30 states. [2020-10-15 20:31:10,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:31:10,484 INFO L93 Difference]: Finished difference Result 148 states and 357 transitions. [2020-10-15 20:31:10,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-15 20:31:10,486 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 20:31:10,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:31:10,487 INFO L225 Difference]: With dead ends: 148 [2020-10-15 20:31:10,487 INFO L226 Difference]: Without dead ends: 142 [2020-10-15 20:31:10,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1834, Invalid=4328, Unknown=0, NotChecked=0, Total=6162 [2020-10-15 20:31:10,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-15 20:31:10,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 106. [2020-10-15 20:31:10,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-15 20:31:10,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 273 transitions. [2020-10-15 20:31:10,490 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 273 transitions. Word has length 33 [2020-10-15 20:31:10,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:31:10,490 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 273 transitions. [2020-10-15 20:31:10,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:31:10,490 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 273 transitions. [2020-10-15 20:31:10,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:31:10,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:31:10,490 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:31:10,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable359,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:31:10,691 INFO L429 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:31:10,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:31:10,692 INFO L82 PathProgramCache]: Analyzing trace with hash -494544668, now seen corresponding path program 359 times [2020-10-15 20:31:10,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:31:10,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088217268] [2020-10-15 20:31:10,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:31:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:31:11,405 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:11,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088217268] [2020-10-15 20:31:11,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232311097] [2020-10-15 20:31:11,405 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 [2020-10-15 20:31:11,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-15 20:31:11,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:31:11,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:31:11,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:31:11,520 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:11,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:31:11,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 20:31:11,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714669367] [2020-10-15 20:31:11,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:31:11,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:31:11,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:31:11,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:31:11,522 INFO L87 Difference]: Start difference. First operand 106 states and 273 transitions. Second operand 29 states. [2020-10-15 20:31:14,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:31:14,481 INFO L93 Difference]: Finished difference Result 168 states and 407 transitions. [2020-10-15 20:31:14,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-15 20:31:14,484 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 20:31:14,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:31:14,485 INFO L225 Difference]: With dead ends: 168 [2020-10-15 20:31:14,485 INFO L226 Difference]: Without dead ends: 162 [2020-10-15 20:31:14,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1998, Invalid=4322, Unknown=0, NotChecked=0, Total=6320 [2020-10-15 20:31:14,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-15 20:31:14,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 112. [2020-10-15 20:31:14,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-15 20:31:14,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 293 transitions. [2020-10-15 20:31:14,487 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 293 transitions. Word has length 33 [2020-10-15 20:31:14,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:31:14,487 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 293 transitions. [2020-10-15 20:31:14,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:31:14,487 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 293 transitions. [2020-10-15 20:31:14,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:31:14,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:31:14,488 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:31:14,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:31:14,688 INFO L429 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:31:14,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:31:14,689 INFO L82 PathProgramCache]: Analyzing trace with hash -494527928, now seen corresponding path program 360 times [2020-10-15 20:31:14,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:31:14,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429085632] [2020-10-15 20:31:14,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:31:14,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:31:15,418 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:15,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429085632] [2020-10-15 20:31:15,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424106226] [2020-10-15 20:31:15,419 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 [2020-10-15 20:31:15,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-15 20:31:15,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:31:15,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:31:15,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:31:15,534 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:31:15,574 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:15,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:31:15,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 20:31:15,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746913457] [2020-10-15 20:31:15,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:31:15,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:31:15,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:31:15,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:31:15,575 INFO L87 Difference]: Start difference. First operand 112 states and 293 transitions. Second operand 30 states. [2020-10-15 20:31:19,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:31:19,082 INFO L93 Difference]: Finished difference Result 149 states and 363 transitions. [2020-10-15 20:31:19,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-15 20:31:19,084 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 20:31:19,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:31:19,085 INFO L225 Difference]: With dead ends: 149 [2020-10-15 20:31:19,085 INFO L226 Difference]: Without dead ends: 141 [2020-10-15 20:31:19,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1850 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2009, Invalid=4471, Unknown=0, NotChecked=0, Total=6480 [2020-10-15 20:31:19,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-15 20:31:19,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 109. [2020-10-15 20:31:19,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-15 20:31:19,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 281 transitions. [2020-10-15 20:31:19,087 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 281 transitions. Word has length 33 [2020-10-15 20:31:19,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:31:19,087 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 281 transitions. [2020-10-15 20:31:19,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:31:19,087 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 281 transitions. [2020-10-15 20:31:19,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:31:19,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:31:19,087 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:31:19,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:31:19,288 INFO L429 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:31:19,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:31:19,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1551441143, now seen corresponding path program 361 times [2020-10-15 20:31:19,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:31:19,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852196966] [2020-10-15 20:31:19,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:31:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:31:20,307 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:20,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852196966] [2020-10-15 20:31:20,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678327467] [2020-10-15 20:31:20,308 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 [2020-10-15 20:31:20,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:31:20,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:31:20,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:31:20,376 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:20,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:31:20,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 20:31:20,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350621084] [2020-10-15 20:31:20,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:31:20,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:31:20,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:31:20,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:31:20,378 INFO L87 Difference]: Start difference. First operand 109 states and 281 transitions. Second operand 30 states. [2020-10-15 20:31:21,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:31:21,961 INFO L93 Difference]: Finished difference Result 174 states and 411 transitions. [2020-10-15 20:31:21,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:31:21,963 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 20:31:21,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:31:21,964 INFO L225 Difference]: With dead ends: 174 [2020-10-15 20:31:21,964 INFO L226 Difference]: Without dead ends: 168 [2020-10-15 20:31:21,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=975, Invalid=2217, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 20:31:21,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-15 20:31:21,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 111. [2020-10-15 20:31:21,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 20:31:21,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 20:31:21,966 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 20:31:21,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:31:21,967 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 20:31:21,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:31:21,967 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 20:31:21,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:31:21,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:31:21,967 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:31:22,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable362 [2020-10-15 20:31:22,168 INFO L429 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:31:22,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:31:22,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1122267739, now seen corresponding path program 362 times [2020-10-15 20:31:22,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:31:22,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795201061] [2020-10-15 20:31:22,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:31:22,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:31:23,208 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:23,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795201061] [2020-10-15 20:31:23,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339297845] [2020-10-15 20:31:23,208 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 [2020-10-15 20:31:23,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:31:23,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:31:23,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:31:23,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:31:23,321 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:31:23,340 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:23,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:31:23,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 20:31:23,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948652109] [2020-10-15 20:31:23,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:31:23,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:31:23,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:31:23,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:31:23,341 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 20:31:25,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:31:25,123 INFO L93 Difference]: Finished difference Result 171 states and 405 transitions. [2020-10-15 20:31:25,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:31:25,125 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 20:31:25,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:31:25,125 INFO L225 Difference]: With dead ends: 171 [2020-10-15 20:31:25,125 INFO L226 Difference]: Without dead ends: 165 [2020-10-15 20:31:25,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1034, Invalid=2506, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 20:31:25,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-15 20:31:25,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 110. [2020-10-15 20:31:25,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 20:31:25,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 20:31:25,128 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 20:31:25,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:31:25,128 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 20:31:25,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:31:25,128 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 20:31:25,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:31:25,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:31:25,129 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:31:25,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:31:25,329 INFO L429 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:31:25,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:31:25,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1692542375, now seen corresponding path program 363 times [2020-10-15 20:31:25,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:31:25,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380899395] [2020-10-15 20:31:25,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:31:25,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:31:26,309 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:26,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380899395] [2020-10-15 20:31:26,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138690367] [2020-10-15 20:31:26,310 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 [2020-10-15 20:31:26,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-15 20:31:26,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:31:26,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:31:26,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:31:26,392 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:26,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:31:26,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 20:31:26,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458191634] [2020-10-15 20:31:26,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:31:26,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:31:26,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:31:26,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:31:26,393 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 20:31:28,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:31:28,158 INFO L93 Difference]: Finished difference Result 168 states and 399 transitions. [2020-10-15 20:31:28,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 20:31:28,160 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 20:31:28,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:31:28,161 INFO L225 Difference]: With dead ends: 168 [2020-10-15 20:31:28,161 INFO L226 Difference]: Without dead ends: 162 [2020-10-15 20:31:28,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=974, Invalid=2448, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 20:31:28,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-15 20:31:28,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 111. [2020-10-15 20:31:28,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 20:31:28,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 20:31:28,163 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 20:31:28,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:31:28,163 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 20:31:28,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:31:28,163 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 20:31:28,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:31:28,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:31:28,164 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:31:28,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2020-10-15 20:31:28,365 INFO L429 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:31:28,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:31:28,365 INFO L82 PathProgramCache]: Analyzing trace with hash 778516669, now seen corresponding path program 364 times [2020-10-15 20:31:28,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:31:28,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422135229] [2020-10-15 20:31:28,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:31:28,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:31:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:29,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422135229] [2020-10-15 20:31:29,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032804979] [2020-10-15 20:31:29,354 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 [2020-10-15 20:31:29,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:31:29,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:31:29,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:31:29,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:31:29,457 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:31:29,484 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:29,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:31:29,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 20:31:29,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107779383] [2020-10-15 20:31:29,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:31:29,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:31:29,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:31:29,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:31:29,485 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 20:31:31,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:31:31,528 INFO L93 Difference]: Finished difference Result 167 states and 397 transitions. [2020-10-15 20:31:31,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:31:31,530 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 20:31:31,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:31:31,530 INFO L225 Difference]: With dead ends: 167 [2020-10-15 20:31:31,530 INFO L226 Difference]: Without dead ends: 161 [2020-10-15 20:31:31,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1040, Invalid=2742, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 20:31:31,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-15 20:31:31,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 110. [2020-10-15 20:31:31,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 20:31:31,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 20:31:31,533 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 20:31:31,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:31:31,533 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 20:31:31,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:31:31,533 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 20:31:31,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:31:31,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:31:31,533 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:31:31,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable365,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:31:31,734 INFO L429 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:31:31,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:31:31,734 INFO L82 PathProgramCache]: Analyzing trace with hash -46757829, now seen corresponding path program 365 times [2020-10-15 20:31:31,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:31:31,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115133823] [2020-10-15 20:31:31,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:31:31,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:31:32,687 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:32,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115133823] [2020-10-15 20:31:32,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086004537] [2020-10-15 20:31:32,687 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 [2020-10-15 20:31:32,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-15 20:31:32,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:31:32,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:31:32,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:31:32,769 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:32,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:31:32,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 20:31:32,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732477012] [2020-10-15 20:31:32,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:31:32,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:31:32,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:31:32,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:31:32,770 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 20:31:34,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:31:34,738 INFO L93 Difference]: Finished difference Result 164 states and 391 transitions. [2020-10-15 20:31:34,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:31:34,740 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 20:31:34,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:31:34,741 INFO L225 Difference]: With dead ends: 164 [2020-10-15 20:31:34,741 INFO L226 Difference]: Without dead ends: 158 [2020-10-15 20:31:34,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=989, Invalid=2671, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 20:31:34,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-15 20:31:34,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 111. [2020-10-15 20:31:34,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 20:31:34,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 20:31:34,747 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 20:31:34,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:31:34,747 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 20:31:34,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:31:34,748 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 20:31:34,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:31:34,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:31:34,748 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:31:34,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2020-10-15 20:31:34,949 INFO L429 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:31:34,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:31:34,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1085526113, now seen corresponding path program 366 times [2020-10-15 20:31:34,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:31:34,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588771651] [2020-10-15 20:31:34,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:31:34,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:31:35,925 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:35,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588771651] [2020-10-15 20:31:35,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083325990] [2020-10-15 20:31:35,926 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 [2020-10-15 20:31:35,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-15 20:31:35,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:31:35,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:31:35,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:31:36,043 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:31:36,067 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:36,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:31:36,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 20:31:36,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536324191] [2020-10-15 20:31:36,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:31:36,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:31:36,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:31:36,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:31:36,068 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 20:31:38,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:31:38,335 INFO L93 Difference]: Finished difference Result 163 states and 389 transitions. [2020-10-15 20:31:38,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 20:31:38,338 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 20:31:38,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:31:38,338 INFO L225 Difference]: With dead ends: 163 [2020-10-15 20:31:38,338 INFO L226 Difference]: Without dead ends: 157 [2020-10-15 20:31:38,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1062, Invalid=2970, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 20:31:38,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-15 20:31:38,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 110. [2020-10-15 20:31:38,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 20:31:38,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 20:31:38,341 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 20:31:38,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:31:38,341 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 20:31:38,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:31:38,341 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 20:31:38,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:31:38,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:31:38,341 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:31:38,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2020-10-15 20:31:38,542 INFO L429 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:31:38,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:31:38,543 INFO L82 PathProgramCache]: Analyzing trace with hash -670742883, now seen corresponding path program 367 times [2020-10-15 20:31:38,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:31:38,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387481724] [2020-10-15 20:31:38,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:31:38,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:31:39,454 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:39,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387481724] [2020-10-15 20:31:39,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254337443] [2020-10-15 20:31:39,454 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 [2020-10-15 20:31:39,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:31:39,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:31:39,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:31:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:39,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:31:39,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 20:31:39,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126097618] [2020-10-15 20:31:39,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:31:39,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:31:39,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:31:39,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:31:39,534 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 20:31:41,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:31:41,661 INFO L93 Difference]: Finished difference Result 160 states and 383 transitions. [2020-10-15 20:31:41,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 20:31:41,664 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 20:31:41,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:31:41,664 INFO L225 Difference]: With dead ends: 160 [2020-10-15 20:31:41,664 INFO L226 Difference]: Without dead ends: 154 [2020-10-15 20:31:41,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1020, Invalid=2886, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 20:31:41,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-15 20:31:41,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 111. [2020-10-15 20:31:41,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 20:31:41,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 20:31:41,667 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 20:31:41,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:31:41,667 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 20:31:41,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:31:41,667 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 20:31:41,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:31:41,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:31:41,668 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:31:41,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:31:41,868 INFO L429 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:31:41,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:31:41,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1902475009, now seen corresponding path program 368 times [2020-10-15 20:31:41,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:31:41,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13928064] [2020-10-15 20:31:41,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:31:41,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:31:42,820 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:42,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13928064] [2020-10-15 20:31:42,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533858686] [2020-10-15 20:31:42,820 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 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 [2020-10-15 20:31:42,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:31:42,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:31:42,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:31:42,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:31:42,934 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:31:42,959 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:42,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:31:42,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 20:31:42,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903598220] [2020-10-15 20:31:42,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:31:42,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:31:42,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:31:42,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:31:42,960 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 20:31:45,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:31:45,428 INFO L93 Difference]: Finished difference Result 159 states and 381 transitions. [2020-10-15 20:31:45,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 20:31:45,431 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 20:31:45,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:31:45,431 INFO L225 Difference]: With dead ends: 159 [2020-10-15 20:31:45,431 INFO L226 Difference]: Without dead ends: 153 [2020-10-15 20:31:45,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1100, Invalid=3190, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 20:31:45,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-15 20:31:45,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 110. [2020-10-15 20:31:45,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 20:31:45,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 20:31:45,434 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 20:31:45,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:31:45,434 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 20:31:45,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:31:45,434 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 20:31:45,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:31:45,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:31:45,434 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:31:45,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2020-10-15 20:31:45,635 INFO L429 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:31:45,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:31:45,636 INFO L82 PathProgramCache]: Analyzing trace with hash 718550399, now seen corresponding path program 369 times [2020-10-15 20:31:45,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:31:45,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055785117] [2020-10-15 20:31:45,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:31:45,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:31:46,565 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:46,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055785117] [2020-10-15 20:31:46,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053101329] [2020-10-15 20:31:46,565 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 [2020-10-15 20:31:46,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-15 20:31:46,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:31:46,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:31:46,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:31:46,656 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:46,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:31:46,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 20:31:46,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724887814] [2020-10-15 20:31:46,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:31:46,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:31:46,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:31:46,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:31:46,658 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 20:31:48,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:31:48,932 INFO L93 Difference]: Finished difference Result 156 states and 375 transitions. [2020-10-15 20:31:48,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 20:31:48,935 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 20:31:48,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:31:48,935 INFO L225 Difference]: With dead ends: 156 [2020-10-15 20:31:48,935 INFO L226 Difference]: Without dead ends: 150 [2020-10-15 20:31:48,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1067, Invalid=3093, Unknown=0, NotChecked=0, Total=4160 [2020-10-15 20:31:48,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-15 20:31:48,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 111. [2020-10-15 20:31:48,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 20:31:48,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 20:31:48,938 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 20:31:48,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:31:48,938 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 20:31:48,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:31:48,938 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 20:31:48,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:31:48,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:31:48,938 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:31:49,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:31:49,139 INFO L429 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:31:49,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:31:49,140 INFO L82 PathProgramCache]: Analyzing trace with hash -829608221, now seen corresponding path program 370 times [2020-10-15 20:31:49,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:31:49,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262313734] [2020-10-15 20:31:49,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:31:49,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:31:50,052 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:50,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262313734] [2020-10-15 20:31:50,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477296996] [2020-10-15 20:31:50,053 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 [2020-10-15 20:31:50,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:31:50,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:31:50,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:31:50,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:31:50,162 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:31:50,189 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:50,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:31:50,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 20:31:50,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242946796] [2020-10-15 20:31:50,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:31:50,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:31:50,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:31:50,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:31:50,190 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 20:31:52,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:31:52,872 INFO L93 Difference]: Finished difference Result 155 states and 373 transitions. [2020-10-15 20:31:52,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 20:31:52,874 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 20:31:52,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:31:52,874 INFO L225 Difference]: With dead ends: 155 [2020-10-15 20:31:52,874 INFO L226 Difference]: Without dead ends: 149 [2020-10-15 20:31:52,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1154, Invalid=3402, Unknown=0, NotChecked=0, Total=4556 [2020-10-15 20:31:52,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-15 20:31:52,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 110. [2020-10-15 20:31:52,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 20:31:52,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 20:31:52,877 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 20:31:52,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:31:52,877 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 20:31:52,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:31:52,877 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 20:31:52,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:31:52,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:31:52,877 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:31:53,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:31:53,078 INFO L429 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:31:53,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:31:53,078 INFO L82 PathProgramCache]: Analyzing trace with hash -2131397407, now seen corresponding path program 371 times [2020-10-15 20:31:53,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:31:53,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474616176] [2020-10-15 20:31:53,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:31:53,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:31:53,960 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:53,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474616176] [2020-10-15 20:31:53,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553763746] [2020-10-15 20:31:53,961 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 [2020-10-15 20:31:54,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-15 20:31:54,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:31:54,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:31:54,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:31:54,053 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:54,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:31:54,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 20:31:54,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095898589] [2020-10-15 20:31:54,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:31:54,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:31:54,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:31:54,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:31:54,054 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 20:31:56,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:31:56,484 INFO L93 Difference]: Finished difference Result 152 states and 367 transitions. [2020-10-15 20:31:56,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 20:31:56,487 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 20:31:56,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:31:56,487 INFO L225 Difference]: With dead ends: 152 [2020-10-15 20:31:56,487 INFO L226 Difference]: Without dead ends: 146 [2020-10-15 20:31:56,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1130, Invalid=3292, Unknown=0, NotChecked=0, Total=4422 [2020-10-15 20:31:56,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-15 20:31:56,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 111. [2020-10-15 20:31:56,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 20:31:56,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 20:31:56,490 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 20:31:56,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:31:56,490 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 20:31:56,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:31:56,490 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 20:31:56,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:31:56,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:31:56,490 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:31:56,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:31:56,691 INFO L429 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:31:56,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:31:56,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1353021253, now seen corresponding path program 372 times [2020-10-15 20:31:56,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:31:56,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952739078] [2020-10-15 20:31:56,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:31:56,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:31:57,600 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:57,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952739078] [2020-10-15 20:31:57,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649241382] [2020-10-15 20:31:57,601 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 [2020-10-15 20:31:57,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-15 20:31:57,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:31:57,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:31:57,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:31:57,717 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:31:57,747 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:57,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:31:57,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 20:31:57,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964258226] [2020-10-15 20:31:57,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:31:57,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:31:57,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:31:57,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:31:57,748 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 20:32:00,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:32:00,688 INFO L93 Difference]: Finished difference Result 151 states and 365 transitions. [2020-10-15 20:32:00,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 20:32:00,690 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 20:32:00,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:32:00,691 INFO L225 Difference]: With dead ends: 151 [2020-10-15 20:32:00,691 INFO L226 Difference]: Without dead ends: 145 [2020-10-15 20:32:00,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1224, Invalid=3606, Unknown=0, NotChecked=0, Total=4830 [2020-10-15 20:32:00,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-15 20:32:00,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 110. [2020-10-15 20:32:00,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 20:32:00,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 20:32:00,693 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 20:32:00,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:32:00,694 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 20:32:00,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:32:00,694 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 20:32:00,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:32:00,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:32:00,694 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:32:00,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:32:00,895 INFO L429 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:32:00,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:32:00,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1405297859, now seen corresponding path program 373 times [2020-10-15 20:32:00,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:32:00,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98455529] [2020-10-15 20:32:00,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:32:00,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:32:01,763 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:01,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98455529] [2020-10-15 20:32:01,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036715716] [2020-10-15 20:32:01,764 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 [2020-10-15 20:32:01,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:32:01,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:32:01,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:32:01,858 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:01,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:32:01,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 20:32:01,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762960628] [2020-10-15 20:32:01,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:32:01,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:32:01,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:32:01,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:32:01,859 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 20:32:04,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:32:04,449 INFO L93 Difference]: Finished difference Result 148 states and 359 transitions. [2020-10-15 20:32:04,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 20:32:04,451 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 20:32:04,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:32:04,452 INFO L225 Difference]: With dead ends: 148 [2020-10-15 20:32:04,452 INFO L226 Difference]: Without dead ends: 142 [2020-10-15 20:32:04,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1209, Invalid=3483, Unknown=0, NotChecked=0, Total=4692 [2020-10-15 20:32:04,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-15 20:32:04,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 111. [2020-10-15 20:32:04,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 20:32:04,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 20:32:04,454 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 20:32:04,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:32:04,455 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 20:32:04,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:32:04,455 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 20:32:04,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:32:04,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:32:04,455 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:32:04,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable374 [2020-10-15 20:32:04,656 INFO L429 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:32:04,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:32:04,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1013419993, now seen corresponding path program 374 times [2020-10-15 20:32:04,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:32:04,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136169538] [2020-10-15 20:32:04,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:32:04,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:32:05,558 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:05,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136169538] [2020-10-15 20:32:05,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791524330] [2020-10-15 20:32:05,559 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 [2020-10-15 20:32:05,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:32:05,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:32:05,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:32:05,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:32:05,669 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:32:05,702 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:05,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:32:05,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 20:32:05,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543135336] [2020-10-15 20:32:05,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:32:05,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:32:05,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:32:05,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:32:05,703 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 20:32:08,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:32:08,846 INFO L93 Difference]: Finished difference Result 147 states and 357 transitions. [2020-10-15 20:32:08,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-15 20:32:08,848 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 20:32:08,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:32:08,849 INFO L225 Difference]: With dead ends: 147 [2020-10-15 20:32:08,849 INFO L226 Difference]: Without dead ends: 141 [2020-10-15 20:32:08,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1310, Invalid=3802, Unknown=0, NotChecked=0, Total=5112 [2020-10-15 20:32:08,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-15 20:32:08,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 110. [2020-10-15 20:32:08,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 20:32:08,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 20:32:08,851 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 20:32:08,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:32:08,852 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 20:32:08,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:32:08,852 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 20:32:08,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:32:08,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:32:08,852 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:32:09,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2020-10-15 20:32:09,053 INFO L429 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:32:09,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:32:09,053 INFO L82 PathProgramCache]: Analyzing trace with hash -325098203, now seen corresponding path program 375 times [2020-10-15 20:32:09,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:32:09,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456441576] [2020-10-15 20:32:09,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:32:09,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:32:09,929 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:09,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456441576] [2020-10-15 20:32:09,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514372681] [2020-10-15 20:32:09,929 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 [2020-10-15 20:32:09,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-15 20:32:09,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:32:09,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:32:09,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:32:10,034 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:10,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:32:10,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 20:32:10,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374572230] [2020-10-15 20:32:10,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:32:10,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:32:10,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:32:10,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:32:10,036 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 20:32:12,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:32:12,781 INFO L93 Difference]: Finished difference Result 144 states and 351 transitions. [2020-10-15 20:32:12,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-15 20:32:12,783 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 20:32:12,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:32:12,784 INFO L225 Difference]: With dead ends: 144 [2020-10-15 20:32:12,784 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 20:32:12,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1304, Invalid=3666, Unknown=0, NotChecked=0, Total=4970 [2020-10-15 20:32:12,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 20:32:12,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 111. [2020-10-15 20:32:12,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 20:32:12,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 20:32:12,787 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 20:32:12,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:32:12,787 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 20:32:12,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:32:12,788 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 20:32:12,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:32:12,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:32:12,788 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:32:12,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2020-10-15 20:32:12,995 INFO L429 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:32:12,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:32:12,996 INFO L82 PathProgramCache]: Analyzing trace with hash 660093321, now seen corresponding path program 376 times [2020-10-15 20:32:12,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:32:12,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737393880] [2020-10-15 20:32:12,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:32:13,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:32:13,856 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:13,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737393880] [2020-10-15 20:32:13,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496263967] [2020-10-15 20:32:13,856 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 [2020-10-15 20:32:13,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:32:13,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:32:13,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:32:13,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:32:13,966 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:32:14,000 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:14,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:32:14,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 20:32:14,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360364232] [2020-10-15 20:32:14,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:32:14,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:32:14,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:32:14,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:32:14,001 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 20:32:17,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:32:17,416 INFO L93 Difference]: Finished difference Result 143 states and 349 transitions. [2020-10-15 20:32:17,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-15 20:32:17,418 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 20:32:17,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:32:17,419 INFO L225 Difference]: With dead ends: 143 [2020-10-15 20:32:17,419 INFO L226 Difference]: Without dead ends: 137 [2020-10-15 20:32:17,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1310 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1412, Invalid=3990, Unknown=0, NotChecked=0, Total=5402 [2020-10-15 20:32:17,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-15 20:32:17,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 110. [2020-10-15 20:32:17,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 20:32:17,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 20:32:17,421 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 20:32:17,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:32:17,422 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 20:32:17,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:32:17,422 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 20:32:17,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:32:17,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:32:17,422 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:32:17,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2020-10-15 20:32:17,623 INFO L429 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:32:17,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:32:17,623 INFO L82 PathProgramCache]: Analyzing trace with hash -957065721, now seen corresponding path program 377 times [2020-10-15 20:32:17,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:32:17,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914263012] [2020-10-15 20:32:17,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:32:17,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:32:18,470 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:18,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914263012] [2020-10-15 20:32:18,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785652359] [2020-10-15 20:32:18,470 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 [2020-10-15 20:32:18,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-15 20:32:18,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:32:18,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:32:18,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:32:18,575 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:18,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:32:18,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 20:32:18,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513120359] [2020-10-15 20:32:18,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:32:18,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:32:18,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:32:18,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:32:18,576 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 20:32:21,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:32:21,509 INFO L93 Difference]: Finished difference Result 140 states and 343 transitions. [2020-10-15 20:32:21,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 20:32:21,512 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 20:32:21,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:32:21,512 INFO L225 Difference]: With dead ends: 140 [2020-10-15 20:32:21,512 INFO L226 Difference]: Without dead ends: 134 [2020-10-15 20:32:21,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1415, Invalid=3841, Unknown=0, NotChecked=0, Total=5256 [2020-10-15 20:32:21,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-15 20:32:21,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 111. [2020-10-15 20:32:21,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 20:32:21,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 20:32:21,514 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 20:32:21,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:32:21,515 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 20:32:21,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:32:21,515 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 20:32:21,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:32:21,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:32:21,515 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:32:21,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 375 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2020-10-15 20:32:21,716 INFO L429 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:32:21,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:32:21,716 INFO L82 PathProgramCache]: Analyzing trace with hash 299823979, now seen corresponding path program 378 times [2020-10-15 20:32:21,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:32:21,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139794522] [2020-10-15 20:32:21,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:32:21,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:32:22,566 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:22,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139794522] [2020-10-15 20:32:22,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121157639] [2020-10-15 20:32:22,567 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 [2020-10-15 20:32:22,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-15 20:32:22,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:32:22,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:32:22,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:32:22,691 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:32:22,726 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:22,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:32:22,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 20:32:22,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032166625] [2020-10-15 20:32:22,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:32:22,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:32:22,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:32:22,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:32:22,727 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 20:32:26,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:32:26,256 INFO L93 Difference]: Finished difference Result 139 states and 341 transitions. [2020-10-15 20:32:26,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-15 20:32:26,258 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 20:32:26,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:32:26,259 INFO L225 Difference]: With dead ends: 139 [2020-10-15 20:32:26,259 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 20:32:26,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1530, Invalid=4170, Unknown=0, NotChecked=0, Total=5700 [2020-10-15 20:32:26,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 20:32:26,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 110. [2020-10-15 20:32:26,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 20:32:26,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 20:32:26,266 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 20:32:26,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:32:26,266 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 20:32:26,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:32:26,266 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 20:32:26,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:32:26,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:32:26,267 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:32:26,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2020-10-15 20:32:26,467 INFO L429 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:32:26,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:32:26,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1916016489, now seen corresponding path program 379 times [2020-10-15 20:32:26,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:32:26,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768189960] [2020-10-15 20:32:26,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:32:26,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:32:27,320 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:27,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768189960] [2020-10-15 20:32:27,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829484746] [2020-10-15 20:32:27,320 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 [2020-10-15 20:32:27,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:32:27,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:32:27,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:32:27,428 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:27,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:32:27,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 20:32:27,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080265868] [2020-10-15 20:32:27,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:32:27,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:32:27,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:32:27,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:32:27,429 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 20:32:30,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:32:30,511 INFO L93 Difference]: Finished difference Result 136 states and 335 transitions. [2020-10-15 20:32:30,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-15 20:32:30,513 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 20:32:30,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:32:30,513 INFO L225 Difference]: With dead ends: 136 [2020-10-15 20:32:30,513 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 20:32:30,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1542, Invalid=4008, Unknown=0, NotChecked=0, Total=5550 [2020-10-15 20:32:30,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 20:32:30,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 111. [2020-10-15 20:32:30,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 20:32:30,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 20:32:30,516 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 20:32:30,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:32:30,516 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 20:32:30,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:32:30,516 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 20:32:30,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:32:30,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:32:30,517 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:32:30,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:32:30,717 INFO L429 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:32:30,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:32:30,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1859207731, now seen corresponding path program 380 times [2020-10-15 20:32:30,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:32:30,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062836012] [2020-10-15 20:32:30,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:32:30,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:32:31,572 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:31,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062836012] [2020-10-15 20:32:31,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139944664] [2020-10-15 20:32:31,573 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 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 [2020-10-15 20:32:31,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:32:31,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:32:31,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:32:31,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:32:31,688 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:32:31,726 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:31,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:32:31,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 20:32:31,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087043151] [2020-10-15 20:32:31,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:32:31,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:32:31,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:32:31,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:32:31,727 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 20:32:35,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:32:35,574 INFO L93 Difference]: Finished difference Result 135 states and 333 transitions. [2020-10-15 20:32:35,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-15 20:32:35,577 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 20:32:35,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:32:35,577 INFO L225 Difference]: With dead ends: 135 [2020-10-15 20:32:35,577 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 20:32:35,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1664, Invalid=4342, Unknown=0, NotChecked=0, Total=6006 [2020-10-15 20:32:35,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 20:32:35,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-10-15 20:32:35,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 20:32:35,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 20:32:35,580 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 20:32:35,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:32:35,580 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 20:32:35,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:32:35,580 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 20:32:35,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:32:35,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:32:35,581 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:32:35,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:32:35,781 INFO L429 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:32:35,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:32:35,782 INFO L82 PathProgramCache]: Analyzing trace with hash -203896501, now seen corresponding path program 381 times [2020-10-15 20:32:35,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:32:35,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375277113] [2020-10-15 20:32:35,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:32:35,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:32:36,645 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:36,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375277113] [2020-10-15 20:32:36,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400245019] [2020-10-15 20:32:36,645 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 [2020-10-15 20:32:36,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-15 20:32:36,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:32:36,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:32:36,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:32:36,764 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:36,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:32:36,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 20:32:36,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889104240] [2020-10-15 20:32:36,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:32:36,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:32:36,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:32:36,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:32:36,766 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 20:32:40,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:32:40,074 INFO L93 Difference]: Finished difference Result 132 states and 327 transitions. [2020-10-15 20:32:40,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-15 20:32:40,077 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 20:32:40,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:32:40,077 INFO L225 Difference]: With dead ends: 132 [2020-10-15 20:32:40,077 INFO L226 Difference]: Without dead ends: 126 [2020-10-15 20:32:40,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1525 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1685, Invalid=4167, Unknown=0, NotChecked=0, Total=5852 [2020-10-15 20:32:40,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-15 20:32:40,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 111. [2020-10-15 20:32:40,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 20:32:40,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 20:32:40,079 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 20:32:40,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:32:40,079 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 20:32:40,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:32:40,080 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 20:32:40,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:32:40,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:32:40,080 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:32:40,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:32:40,285 INFO L429 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:32:40,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:32:40,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1924024145, now seen corresponding path program 382 times [2020-10-15 20:32:40,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:32:40,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368965801] [2020-10-15 20:32:40,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:32:40,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:32:41,155 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:41,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368965801] [2020-10-15 20:32:41,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916997515] [2020-10-15 20:32:41,155 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 [2020-10-15 20:32:41,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:32:41,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:32:41,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:32:41,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:32:41,268 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:32:41,309 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:41,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:32:41,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 20:32:41,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514854742] [2020-10-15 20:32:41,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:32:41,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:32:41,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:32:41,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:32:41,311 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 20:32:45,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:32:45,379 INFO L93 Difference]: Finished difference Result 131 states and 325 transitions. [2020-10-15 20:32:45,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-15 20:32:45,383 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 20:32:45,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:32:45,383 INFO L225 Difference]: With dead ends: 131 [2020-10-15 20:32:45,384 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 20:32:45,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1814, Invalid=4506, Unknown=0, NotChecked=0, Total=6320 [2020-10-15 20:32:45,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 20:32:45,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 110. [2020-10-15 20:32:45,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 20:32:45,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 20:32:45,387 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 20:32:45,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:32:45,387 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 20:32:45,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:32:45,387 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 20:32:45,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:32:45,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:32:45,388 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:32:45,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:32:45,591 INFO L429 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:32:45,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:32:45,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1453028435, now seen corresponding path program 383 times [2020-10-15 20:32:45,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:32:45,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568870257] [2020-10-15 20:32:45,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:32:45,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:32:46,460 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:46,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568870257] [2020-10-15 20:32:46,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985784859] [2020-10-15 20:32:46,460 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 [2020-10-15 20:32:46,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-15 20:32:46,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:32:46,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:32:46,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:32:46,581 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:46,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:32:46,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 20:32:46,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70045125] [2020-10-15 20:32:46,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:32:46,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:32:46,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:32:46,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:32:46,583 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 20:32:50,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:32:50,054 INFO L93 Difference]: Finished difference Result 128 states and 319 transitions. [2020-10-15 20:32:50,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-15 20:32:50,056 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 20:32:50,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:32:50,057 INFO L225 Difference]: With dead ends: 128 [2020-10-15 20:32:50,057 INFO L226 Difference]: Without dead ends: 122 [2020-10-15 20:32:50,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1644 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1844, Invalid=4318, Unknown=0, NotChecked=0, Total=6162 [2020-10-15 20:32:50,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-15 20:32:50,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 111. [2020-10-15 20:32:50,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 20:32:50,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 20:32:50,060 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 20:32:50,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:32:50,060 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 20:32:50,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:32:50,060 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 20:32:50,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:32:50,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:32:50,061 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:32:50,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,381 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:32:50,261 INFO L429 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:32:50,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:32:50,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1436941295, now seen corresponding path program 384 times [2020-10-15 20:32:50,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:32:50,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049584028] [2020-10-15 20:32:50,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:32:50,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:32:51,135 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:51,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049584028] [2020-10-15 20:32:51,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360177273] [2020-10-15 20:32:51,135 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 [2020-10-15 20:32:51,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-15 20:32:51,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:32:51,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:32:51,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:32:51,252 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:32:51,304 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:51,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:32:51,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 20:32:51,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576571637] [2020-10-15 20:32:51,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:32:51,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:32:51,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:32:51,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=735, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:32:51,305 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 20:32:55,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:32:55,589 INFO L93 Difference]: Finished difference Result 127 states and 317 transitions. [2020-10-15 20:32:55,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-15 20:32:55,592 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 20:32:55,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:32:55,592 INFO L225 Difference]: With dead ends: 127 [2020-10-15 20:32:55,592 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 20:32:55,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1766 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1980, Invalid=4662, Unknown=0, NotChecked=0, Total=6642 [2020-10-15 20:32:55,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 20:32:55,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 110. [2020-10-15 20:32:55,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 20:32:55,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 20:32:55,595 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 20:32:55,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:32:55,595 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 20:32:55,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:32:55,595 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 20:32:55,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:32:55,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:32:55,595 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:32:55,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:32:55,796 INFO L429 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:32:55,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:32:55,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1436451185, now seen corresponding path program 385 times [2020-10-15 20:32:55,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:32:55,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239654956] [2020-10-15 20:32:55,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:32:55,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:32:56,682 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:56,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239654956] [2020-10-15 20:32:56,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707842593] [2020-10-15 20:32:56,683 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 [2020-10-15 20:32:56,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:32:56,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:32:56,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:32:56,797 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:56,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:32:56,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 20:32:56,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508587771] [2020-10-15 20:32:56,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:32:56,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:32:56,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:32:56,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:32:56,798 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 20:33:00,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:33:00,420 INFO L93 Difference]: Finished difference Result 143 states and 357 transitions. [2020-10-15 20:33:00,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-15 20:33:00,422 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 20:33:00,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:33:00,423 INFO L225 Difference]: With dead ends: 143 [2020-10-15 20:33:00,423 INFO L226 Difference]: Without dead ends: 137 [2020-10-15 20:33:00,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1767 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2019, Invalid=4461, Unknown=0, NotChecked=0, Total=6480 [2020-10-15 20:33:00,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-15 20:33:00,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 114. [2020-10-15 20:33:00,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-15 20:33:00,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 297 transitions. [2020-10-15 20:33:00,426 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 297 transitions. Word has length 34 [2020-10-15 20:33:00,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:33:00,426 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 297 transitions. [2020-10-15 20:33:00,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:33:00,426 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 297 transitions. [2020-10-15 20:33:00,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:33:00,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:33:00,426 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:33:00,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2020-10-15 20:33:00,627 INFO L429 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:33:00,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:33:00,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1436434445, now seen corresponding path program 386 times [2020-10-15 20:33:00,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:33:00,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752021517] [2020-10-15 20:33:00,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:33:00,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:33:01,493 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:01,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752021517] [2020-10-15 20:33:01,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196871196] [2020-10-15 20:33:01,494 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 [2020-10-15 20:33:01,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:33:01,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:33:01,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:33:01,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:33:01,624 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:33:01,668 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:01,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:33:01,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 20:33:01,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118403354] [2020-10-15 20:33:01,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:33:01,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:33:01,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:33:01,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=712, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:33:01,670 INFO L87 Difference]: Start difference. First operand 114 states and 297 transitions. Second operand 31 states. [2020-10-15 20:33:06,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:33:06,129 INFO L93 Difference]: Finished difference Result 124 states and 313 transitions. [2020-10-15 20:33:06,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-15 20:33:06,132 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 20:33:06,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:33:06,132 INFO L225 Difference]: With dead ends: 124 [2020-10-15 20:33:06,133 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 20:33:06,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2162, Invalid=4810, Unknown=0, NotChecked=0, Total=6972 [2020-10-15 20:33:06,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 20:33:06,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 81. [2020-10-15 20:33:06,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:33:06,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 198 transitions. [2020-10-15 20:33:06,135 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 198 transitions. Word has length 34 [2020-10-15 20:33:06,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:33:06,135 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 198 transitions. [2020-10-15 20:33:06,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:33:06,135 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 198 transitions. [2020-10-15 20:33:06,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:33:06,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:33:06,136 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:33:06,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2020-10-15 20:33:06,336 INFO L429 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:33:06,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:33:06,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1849519723, now seen corresponding path program 387 times [2020-10-15 20:33:06,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:33:06,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028385034] [2020-10-15 20:33:06,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:33:06,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:33:07,311 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:07,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028385034] [2020-10-15 20:33:07,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323643766] [2020-10-15 20:33:07,312 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 [2020-10-15 20:33:07,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-15 20:33:07,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:33:07,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:33:07,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:33:07,436 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:33:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:07,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:33:07,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 20:33:07,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129548563] [2020-10-15 20:33:07,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:33:07,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:33:07,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:33:07,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:33:07,500 INFO L87 Difference]: Start difference. First operand 81 states and 198 transitions. Second operand 31 states. [2020-10-15 20:33:11,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:33:11,679 INFO L93 Difference]: Finished difference Result 148 states and 363 transitions. [2020-10-15 20:33:11,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-15 20:33:11,682 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 20:33:11,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:33:11,682 INFO L225 Difference]: With dead ends: 148 [2020-10-15 20:33:11,682 INFO L226 Difference]: Without dead ends: 143 [2020-10-15 20:33:11,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2233, Invalid=4739, Unknown=0, NotChecked=0, Total=6972 [2020-10-15 20:33:11,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-15 20:33:11,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 112. [2020-10-15 20:33:11,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-15 20:33:11,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 289 transitions. [2020-10-15 20:33:11,685 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 289 transitions. Word has length 34 [2020-10-15 20:33:11,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:33:11,685 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 289 transitions. [2020-10-15 20:33:11,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:33:11,685 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 289 transitions. [2020-10-15 20:33:11,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 20:33:11,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:33:11,686 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:33:11,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable388,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:33:11,887 INFO L429 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:33:11,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:33:11,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1579778528, now seen corresponding path program 388 times [2020-10-15 20:33:11,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:33:11,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038804398] [2020-10-15 20:33:11,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:33:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:33:12,846 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:12,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038804398] [2020-10-15 20:33:12,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250868008] [2020-10-15 20:33:12,847 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 [2020-10-15 20:33:12,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:33:12,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:33:12,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 20:33:12,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:33:12,965 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:33:13,031 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:13,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:33:13,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-15 20:33:13,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252180257] [2020-10-15 20:33:13,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-15 20:33:13,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:33:13,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-15 20:33:13,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=758, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:33:13,033 INFO L87 Difference]: Start difference. First operand 112 states and 289 transitions. Second operand 32 states. [2020-10-15 20:33:17,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:33:17,480 INFO L93 Difference]: Finished difference Result 120 states and 309 transitions. [2020-10-15 20:33:17,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-15 20:33:17,483 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-15 20:33:17,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:33:17,483 INFO L225 Difference]: With dead ends: 120 [2020-10-15 20:33:17,483 INFO L226 Difference]: Without dead ends: 115 [2020-10-15 20:33:17,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=2255, Invalid=4885, Unknown=0, NotChecked=0, Total=7140 [2020-10-15 20:33:17,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-15 20:33:17,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 82. [2020-10-15 20:33:17,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 20:33:17,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 202 transitions. [2020-10-15 20:33:17,486 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 202 transitions. Word has length 35 [2020-10-15 20:33:17,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:33:17,486 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 202 transitions. [2020-10-15 20:33:17,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-15 20:33:17,486 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 202 transitions. [2020-10-15 20:33:17,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 20:33:17,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:33:17,486 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:33:17,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2020-10-15 20:33:17,689 INFO L429 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:33:17,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:33:17,689 INFO L82 PathProgramCache]: Analyzing trace with hash -484633973, now seen corresponding path program 389 times [2020-10-15 20:33:17,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:33:17,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400988378] [2020-10-15 20:33:17,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:33:17,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:33:18,924 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:18,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400988378] [2020-10-15 20:33:18,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621937018] [2020-10-15 20:33:18,924 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 [2020-10-15 20:33:18,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-10-15 20:33:18,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:33:18,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 20:33:18,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:33:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:19,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:33:19,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-10-15 20:33:19,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604153560] [2020-10-15 20:33:19,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:33:19,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:33:19,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:33:19,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:33:19,005 INFO L87 Difference]: Start difference. First operand 82 states and 202 transitions. Second operand 31 states. [2020-10-15 20:33:20,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:33:20,857 INFO L93 Difference]: Finished difference Result 126 states and 293 transitions. [2020-10-15 20:33:20,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:33:20,859 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-10-15 20:33:20,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:33:20,860 INFO L225 Difference]: With dead ends: 126 [2020-10-15 20:33:20,860 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 20:33:20,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1053, Invalid=2253, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 20:33:20,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 20:33:20,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 90. [2020-10-15 20:33:20,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-15 20:33:20,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 221 transitions. [2020-10-15 20:33:20,862 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 221 transitions. Word has length 35 [2020-10-15 20:33:20,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:33:20,862 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 221 transitions. [2020-10-15 20:33:20,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:33:20,862 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 221 transitions. [2020-10-15 20:33:20,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 20:33:20,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:33:20,863 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:33:21,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:33:21,063 INFO L429 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:33:21,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:33:21,064 INFO L82 PathProgramCache]: Analyzing trace with hash -603414801, now seen corresponding path program 390 times [2020-10-15 20:33:21,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:33:21,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577087729] [2020-10-15 20:33:21,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:33:21,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:33:22,305 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:22,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577087729] [2020-10-15 20:33:22,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691890805] [2020-10-15 20:33:22,305 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 [2020-10-15 20:33:22,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-10-15 20:33:22,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:33:22,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 20:33:22,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:33:22,424 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:33:22,444 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:22,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:33:22,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-15 20:33:22,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770071431] [2020-10-15 20:33:22,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-15 20:33:22,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:33:22,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-15 20:33:22,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:33:22,445 INFO L87 Difference]: Start difference. First operand 90 states and 221 transitions. Second operand 32 states. [2020-10-15 20:33:24,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:33:24,492 INFO L93 Difference]: Finished difference Result 154 states and 349 transitions. [2020-10-15 20:33:24,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:33:24,495 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-15 20:33:24,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:33:24,495 INFO L225 Difference]: With dead ends: 154 [2020-10-15 20:33:24,495 INFO L226 Difference]: Without dead ends: 148 [2020-10-15 20:33:24,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1062, Invalid=2478, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 20:33:24,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-15 20:33:24,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 88. [2020-10-15 20:33:24,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 20:33:24,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 217 transitions. [2020-10-15 20:33:24,497 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 217 transitions. Word has length 35 [2020-10-15 20:33:24,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:33:24,498 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 217 transitions. [2020-10-15 20:33:24,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-15 20:33:24,498 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 217 transitions. [2020-10-15 20:33:24,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 20:33:24,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:33:24,498 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:33:24,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable391 [2020-10-15 20:33:24,699 INFO L429 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:33:24,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:33:24,699 INFO L82 PathProgramCache]: Analyzing trace with hash 193462125, now seen corresponding path program 391 times [2020-10-15 20:33:24,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:33:24,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906959185] [2020-10-15 20:33:24,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:33:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:33:25,915 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:25,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906959185] [2020-10-15 20:33:25,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054780242] [2020-10-15 20:33:25,916 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 [2020-10-15 20:33:25,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:33:25,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 20:33:25,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:33:25,994 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:25,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:33:25,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-10-15 20:33:25,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437090314] [2020-10-15 20:33:25,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:33:25,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:33:25,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:33:25,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:33:25,995 INFO L87 Difference]: Start difference. First operand 88 states and 217 transitions. Second operand 31 states. [2020-10-15 20:33:28,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:33:28,145 INFO L93 Difference]: Finished difference Result 155 states and 353 transitions. [2020-10-15 20:33:28,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:33:28,148 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-10-15 20:33:28,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:33:28,148 INFO L225 Difference]: With dead ends: 155 [2020-10-15 20:33:28,148 INFO L226 Difference]: Without dead ends: 149 [2020-10-15 20:33:28,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1061, Invalid=2599, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 20:33:28,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-15 20:33:28,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 91. [2020-10-15 20:33:28,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 20:33:28,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 225 transitions. [2020-10-15 20:33:28,151 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 225 transitions. Word has length 35 [2020-10-15 20:33:28,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:33:28,151 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 225 transitions. [2020-10-15 20:33:28,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:33:28,152 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 225 transitions. [2020-10-15 20:33:28,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 20:33:28,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:33:28,152 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:33:28,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:33:28,353 INFO L429 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:33:28,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:33:28,353 INFO L82 PathProgramCache]: Analyzing trace with hash -235711279, now seen corresponding path program 392 times [2020-10-15 20:33:28,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:33:28,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513303047] [2020-10-15 20:33:28,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:33:28,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:33:29,586 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:29,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513303047] [2020-10-15 20:33:29,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826924428] [2020-10-15 20:33:29,586 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 [2020-10-15 20:33:29,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:33:29,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:33:29,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 20:33:29,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:33:29,700 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:33:29,728 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:29,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:33:29,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-15 20:33:29,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642171333] [2020-10-15 20:33:29,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-15 20:33:29,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:33:29,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-15 20:33:29,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=783, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:33:29,729 INFO L87 Difference]: Start difference. First operand 91 states and 225 transitions. Second operand 32 states. [2020-10-15 20:33:31,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:33:31,934 INFO L93 Difference]: Finished difference Result 179 states and 401 transitions. [2020-10-15 20:33:31,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:33:31,937 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-15 20:33:31,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:33:31,938 INFO L225 Difference]: With dead ends: 179 [2020-10-15 20:33:31,938 INFO L226 Difference]: Without dead ends: 173 [2020-10-15 20:33:31,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1105, Invalid=2801, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 20:33:31,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-15 20:33:31,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 90. [2020-10-15 20:33:31,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-15 20:33:31,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 223 transitions. [2020-10-15 20:33:31,941 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 223 transitions. Word has length 35 [2020-10-15 20:33:31,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:33:31,941 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 223 transitions. [2020-10-15 20:33:31,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-15 20:33:31,941 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 223 transitions. [2020-10-15 20:33:31,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 20:33:31,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:33:31,941 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:33:32,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,390 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:33:32,142 INFO L429 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:33:32,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:33:32,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1244445903, now seen corresponding path program 393 times [2020-10-15 20:33:32,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:33:32,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279487593] [2020-10-15 20:33:32,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:33:32,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:33:33,327 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:33,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279487593] [2020-10-15 20:33:33,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30842694] [2020-10-15 20:33:33,328 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 [2020-10-15 20:33:33,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-10-15 20:33:33,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:33:33,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 20:33:33,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:33:33,416 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:33,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:33:33,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-10-15 20:33:33,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347459063] [2020-10-15 20:33:33,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:33:33,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:33:33,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:33:33,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:33:33,417 INFO L87 Difference]: Start difference. First operand 90 states and 223 transitions. Second operand 31 states. [2020-10-15 20:33:35,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:33:35,701 INFO L93 Difference]: Finished difference Result 179 states and 403 transitions. [2020-10-15 20:33:35,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 20:33:35,704 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-10-15 20:33:35,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:33:35,704 INFO L225 Difference]: With dead ends: 179 [2020-10-15 20:33:35,704 INFO L226 Difference]: Without dead ends: 173 [2020-10-15 20:33:35,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1118, Invalid=2914, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 20:33:35,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-15 20:33:35,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 93. [2020-10-15 20:33:35,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 20:33:35,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 231 transitions. [2020-10-15 20:33:35,706 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 231 transitions. Word has length 35 [2020-10-15 20:33:35,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:33:35,706 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 231 transitions. [2020-10-15 20:33:35,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:33:35,706 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 231 transitions. [2020-10-15 20:33:35,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 20:33:35,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:33:35,707 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:33:35,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:33:35,907 INFO L429 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:33:35,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:33:35,908 INFO L82 PathProgramCache]: Analyzing trace with hash -579462349, now seen corresponding path program 394 times [2020-10-15 20:33:35,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:33:35,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651219108] [2020-10-15 20:33:35,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:33:35,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:33:37,105 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:37,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651219108] [2020-10-15 20:33:37,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127846521] [2020-10-15 20:33:37,105 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 [2020-10-15 20:33:37,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:33:37,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:33:37,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 20:33:37,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:33:37,219 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:33:37,243 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:37,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:33:37,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-15 20:33:37,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986872635] [2020-10-15 20:33:37,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-15 20:33:37,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:33:37,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-15 20:33:37,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:33:37,244 INFO L87 Difference]: Start difference. First operand 93 states and 231 transitions. Second operand 32 states. [2020-10-15 20:33:39,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:33:39,722 INFO L93 Difference]: Finished difference Result 176 states and 397 transitions. [2020-10-15 20:33:39,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 20:33:39,725 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-15 20:33:39,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:33:39,725 INFO L225 Difference]: With dead ends: 176 [2020-10-15 20:33:39,725 INFO L226 Difference]: Without dead ends: 170 [2020-10-15 20:33:39,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1118, Invalid=3042, Unknown=0, NotChecked=0, Total=4160 [2020-10-15 20:33:39,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-15 20:33:39,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 92. [2020-10-15 20:33:39,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 20:33:39,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 229 transitions. [2020-10-15 20:33:39,727 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 229 transitions. Word has length 35 [2020-10-15 20:33:39,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:33:39,727 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 229 transitions. [2020-10-15 20:33:39,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-15 20:33:39,727 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 229 transitions. [2020-10-15 20:33:39,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 20:33:39,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:33:39,727 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:33:39,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,392 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:33:39,928 INFO L429 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:33:39,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:33:39,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1404736847, now seen corresponding path program 395 times [2020-10-15 20:33:39,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:33:39,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988672789] [2020-10-15 20:33:39,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:33:39,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:33:41,088 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:41,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988672789] [2020-10-15 20:33:41,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346198735] [2020-10-15 20:33:41,089 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 [2020-10-15 20:33:41,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-10-15 20:33:41,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:33:41,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 20:33:41,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:33:41,179 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:41,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:33:41,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-10-15 20:33:41,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834896714] [2020-10-15 20:33:41,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:33:41,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:33:41,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:33:41,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:33:41,180 INFO L87 Difference]: Start difference. First operand 92 states and 229 transitions. Second operand 31 states. [2020-10-15 20:33:43,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:33:43,658 INFO L93 Difference]: Finished difference Result 177 states and 401 transitions. [2020-10-15 20:33:43,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 20:33:43,661 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-10-15 20:33:43,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:33:43,661 INFO L225 Difference]: With dead ends: 177 [2020-10-15 20:33:43,662 INFO L226 Difference]: Without dead ends: 171 [2020-10-15 20:33:43,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1146, Invalid=3144, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 20:33:43,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-15 20:33:43,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 95. [2020-10-15 20:33:43,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-15 20:33:43,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 237 transitions. [2020-10-15 20:33:43,664 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 237 transitions. Word has length 35 [2020-10-15 20:33:43,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:33:43,664 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 237 transitions. [2020-10-15 20:33:43,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:33:43,664 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 237 transitions. [2020-10-15 20:33:43,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 20:33:43,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:33:43,665 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:33:43,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:33:43,865 INFO L429 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:33:43,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:33:43,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1851462165, now seen corresponding path program 396 times [2020-10-15 20:33:43,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:33:43,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370757987] [2020-10-15 20:33:43,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:33:43,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:33:45,034 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:45,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370757987] [2020-10-15 20:33:45,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295914656] [2020-10-15 20:33:45,035 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 [2020-10-15 20:33:45,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-10-15 20:33:45,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:33:45,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 20:33:45,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:33:45,159 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:33:45,192 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:45,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:33:45,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-15 20:33:45,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248927004] [2020-10-15 20:33:45,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-15 20:33:45,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:33:45,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-15 20:33:45,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:33:45,193 INFO L87 Difference]: Start difference. First operand 95 states and 237 transitions. Second operand 32 states. [2020-10-15 20:33:47,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:33:47,912 INFO L93 Difference]: Finished difference Result 174 states and 395 transitions. [2020-10-15 20:33:47,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 20:33:47,915 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-15 20:33:47,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:33:47,916 INFO L225 Difference]: With dead ends: 174 [2020-10-15 20:33:47,916 INFO L226 Difference]: Without dead ends: 168 [2020-10-15 20:33:47,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1147, Invalid=3275, Unknown=0, NotChecked=0, Total=4422 [2020-10-15 20:33:47,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-15 20:33:47,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 94. [2020-10-15 20:33:47,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 20:33:47,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 235 transitions. [2020-10-15 20:33:47,919 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 235 transitions. Word has length 35 [2020-10-15 20:33:47,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:33:47,919 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 235 transitions. [2020-10-15 20:33:47,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-15 20:33:47,919 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 235 transitions. [2020-10-15 20:33:47,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 20:33:47,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:33:47,919 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:33:48,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2020-10-15 20:33:48,120 INFO L429 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:33:48,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:33:48,121 INFO L82 PathProgramCache]: Analyzing trace with hash -2028721901, now seen corresponding path program 397 times [2020-10-15 20:33:48,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:33:48,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790795395] [2020-10-15 20:33:48,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:33:48,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:33:49,247 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:49,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790795395] [2020-10-15 20:33:49,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114313824] [2020-10-15 20:33:49,248 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 [2020-10-15 20:33:49,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:33:49,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 20:33:49,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:33:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:49,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:33:49,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-10-15 20:33:49,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819345221] [2020-10-15 20:33:49,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:33:49,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:33:49,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:33:49,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:33:49,341 INFO L87 Difference]: Start difference. First operand 94 states and 235 transitions. Second operand 31 states. [2020-10-15 20:33:52,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:33:52,012 INFO L93 Difference]: Finished difference Result 175 states and 399 transitions. [2020-10-15 20:33:52,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 20:33:52,016 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-10-15 20:33:52,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:33:52,016 INFO L225 Difference]: With dead ends: 175 [2020-10-15 20:33:52,016 INFO L226 Difference]: Without dead ends: 169 [2020-10-15 20:33:52,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1190, Invalid=3366, Unknown=0, NotChecked=0, Total=4556 [2020-10-15 20:33:52,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-15 20:33:52,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 97. [2020-10-15 20:33:52,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-15 20:33:52,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 243 transitions. [2020-10-15 20:33:52,018 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 243 transitions. Word has length 35 [2020-10-15 20:33:52,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:33:52,018 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 243 transitions. [2020-10-15 20:33:52,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:33:52,018 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 243 transitions. [2020-10-15 20:33:52,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 20:33:52,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:33:52,019 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:33:52,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable398,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:33:52,219 INFO L429 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:33:52,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:33:52,220 INFO L82 PathProgramCache]: Analyzing trace with hash 544495991, now seen corresponding path program 398 times [2020-10-15 20:33:52,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:33:52,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515231633] [2020-10-15 20:33:52,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:33:52,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:33:53,362 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:53,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515231633] [2020-10-15 20:33:53,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910629314] [2020-10-15 20:33:53,363 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 [2020-10-15 20:33:53,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:33:53,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:33:53,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 20:33:53,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:33:53,482 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:33:53,512 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:53,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:33:53,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-15 20:33:53,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841080748] [2020-10-15 20:33:53,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-15 20:33:53,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:33:53,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-15 20:33:53,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:33:53,513 INFO L87 Difference]: Start difference. First operand 97 states and 243 transitions. Second operand 32 states. [2020-10-15 20:33:56,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:33:56,498 INFO L93 Difference]: Finished difference Result 172 states and 393 transitions. [2020-10-15 20:33:56,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 20:33:56,501 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-15 20:33:56,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:33:56,501 INFO L225 Difference]: With dead ends: 172 [2020-10-15 20:33:56,501 INFO L226 Difference]: Without dead ends: 166 [2020-10-15 20:33:56,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1192, Invalid=3500, Unknown=0, NotChecked=0, Total=4692 [2020-10-15 20:33:56,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-15 20:33:56,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 96. [2020-10-15 20:33:56,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-15 20:33:56,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 241 transitions. [2020-10-15 20:33:56,503 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 241 transitions. Word has length 35 [2020-10-15 20:33:56,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:33:56,503 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 241 transitions. [2020-10-15 20:33:56,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-15 20:33:56,504 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 241 transitions. [2020-10-15 20:33:56,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 20:33:56,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:33:56,504 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:33:56,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2020-10-15 20:33:56,705 INFO L429 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:33:56,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:33:56,705 INFO L82 PathProgramCache]: Analyzing trace with hash -639428619, now seen corresponding path program 399 times [2020-10-15 20:33:56,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:33:56,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956804638] [2020-10-15 20:33:56,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:33:56,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:33:57,800 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:57,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956804638] [2020-10-15 20:33:57,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254039558] [2020-10-15 20:33:57,800 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 [2020-10-15 20:33:57,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-10-15 20:33:57,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:33:57,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 20:33:57,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:33:57,900 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:57,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:33:57,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-10-15 20:33:57,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829129416] [2020-10-15 20:33:57,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:33:57,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:33:57,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:33:57,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:33:57,901 INFO L87 Difference]: Start difference. First operand 96 states and 241 transitions. Second operand 31 states. [2020-10-15 20:34:00,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:34:00,761 INFO L93 Difference]: Finished difference Result 173 states and 397 transitions. [2020-10-15 20:34:00,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 20:34:00,765 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-10-15 20:34:00,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:34:00,765 INFO L225 Difference]: With dead ends: 173 [2020-10-15 20:34:00,765 INFO L226 Difference]: Without dead ends: 167 [2020-10-15 20:34:00,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1250, Invalid=3580, Unknown=0, NotChecked=0, Total=4830 [2020-10-15 20:34:00,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-15 20:34:00,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 99. [2020-10-15 20:34:00,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 20:34:00,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 249 transitions. [2020-10-15 20:34:00,767 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 249 transitions. Word has length 35 [2020-10-15 20:34:00,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:34:00,767 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 249 transitions. [2020-10-15 20:34:00,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:34:00,767 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 249 transitions. [2020-10-15 20:34:00,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 20:34:00,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:34:00,768 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:34:00,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2020-10-15 20:34:00,968 INFO L429 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:34:00,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:34:00,969 INFO L82 PathProgramCache]: Analyzing trace with hash 2107380057, now seen corresponding path program 400 times [2020-10-15 20:34:00,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:34:00,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70956925] [2020-10-15 20:34:00,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:34:00,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:34:02,080 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:02,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70956925] [2020-10-15 20:34:02,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236632169] [2020-10-15 20:34:02,080 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 [2020-10-15 20:34:02,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:34:02,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:34:02,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 20:34:02,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:34:02,208 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:34:02,239 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:02,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:34:02,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-15 20:34:02,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954865030] [2020-10-15 20:34:02,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-15 20:34:02,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:34:02,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-15 20:34:02,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:34:02,240 INFO L87 Difference]: Start difference. First operand 99 states and 249 transitions. Second operand 32 states. [2020-10-15 20:34:05,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:34:05,484 INFO L93 Difference]: Finished difference Result 170 states and 391 transitions. [2020-10-15 20:34:05,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 20:34:05,488 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-15 20:34:05,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:34:05,488 INFO L225 Difference]: With dead ends: 170 [2020-10-15 20:34:05,488 INFO L226 Difference]: Without dead ends: 164 [2020-10-15 20:34:05,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1253, Invalid=3717, Unknown=0, NotChecked=0, Total=4970 [2020-10-15 20:34:05,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-15 20:34:05,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 98. [2020-10-15 20:34:05,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 20:34:05,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 247 transitions. [2020-10-15 20:34:05,491 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 247 transitions. Word has length 35 [2020-10-15 20:34:05,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:34:05,491 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 247 transitions. [2020-10-15 20:34:05,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-15 20:34:05,492 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 247 transitions. [2020-10-15 20:34:05,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 20:34:05,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:34:05,492 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:34:05,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:34:05,693 INFO L429 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:34:05,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:34:05,693 INFO L82 PathProgramCache]: Analyzing trace with hash 805590871, now seen corresponding path program 401 times [2020-10-15 20:34:05,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:34:05,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116455873] [2020-10-15 20:34:05,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:34:05,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:34:06,779 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:06,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116455873] [2020-10-15 20:34:06,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239185311] [2020-10-15 20:34:06,780 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 [2020-10-15 20:34:06,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-10-15 20:34:06,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:34:06,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 20:34:06,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:34:06,885 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:06,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:34:06,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-10-15 20:34:06,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010650685] [2020-10-15 20:34:06,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:34:06,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:34:06,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:34:06,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:34:06,886 INFO L87 Difference]: Start difference. First operand 98 states and 247 transitions. Second operand 31 states. [2020-10-15 20:34:09,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:34:09,914 INFO L93 Difference]: Finished difference Result 171 states and 395 transitions. [2020-10-15 20:34:09,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-15 20:34:09,917 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-10-15 20:34:09,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:34:09,917 INFO L225 Difference]: With dead ends: 171 [2020-10-15 20:34:09,917 INFO L226 Difference]: Without dead ends: 165 [2020-10-15 20:34:09,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1326, Invalid=3786, Unknown=0, NotChecked=0, Total=5112 [2020-10-15 20:34:09,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-15 20:34:09,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 101. [2020-10-15 20:34:09,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 20:34:09,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 255 transitions. [2020-10-15 20:34:09,919 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 255 transitions. Word has length 35 [2020-10-15 20:34:09,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:34:09,920 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 255 transitions. [2020-10-15 20:34:09,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:34:09,920 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 255 transitions. [2020-10-15 20:34:09,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 20:34:09,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:34:09,920 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:34:10,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2020-10-15 20:34:10,121 INFO L429 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:34:10,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:34:10,121 INFO L82 PathProgramCache]: Analyzing trace with hash -4957765, now seen corresponding path program 402 times [2020-10-15 20:34:10,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:34:10,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625112087] [2020-10-15 20:34:10,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:34:10,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:34:11,232 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:11,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625112087] [2020-10-15 20:34:11,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676022996] [2020-10-15 20:34:11,233 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 [2020-10-15 20:34:11,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-10-15 20:34:11,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:34:11,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 20:34:11,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:34:11,362 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:34:11,398 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:11,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:34:11,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-15 20:34:11,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046757217] [2020-10-15 20:34:11,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-15 20:34:11,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:34:11,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-15 20:34:11,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:34:11,399 INFO L87 Difference]: Start difference. First operand 101 states and 255 transitions. Second operand 32 states. [2020-10-15 20:34:14,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:34:14,825 INFO L93 Difference]: Finished difference Result 168 states and 389 transitions. [2020-10-15 20:34:14,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-15 20:34:14,828 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-15 20:34:14,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:34:14,829 INFO L225 Difference]: With dead ends: 168 [2020-10-15 20:34:14,829 INFO L226 Difference]: Without dead ends: 162 [2020-10-15 20:34:14,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1330, Invalid=3926, Unknown=0, NotChecked=0, Total=5256 [2020-10-15 20:34:14,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-15 20:34:14,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 100. [2020-10-15 20:34:14,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-15 20:34:14,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 253 transitions. [2020-10-15 20:34:14,832 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 253 transitions. Word has length 35 [2020-10-15 20:34:14,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:34:14,832 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 253 transitions. [2020-10-15 20:34:14,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-15 20:34:14,832 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 253 transitions. [2020-10-15 20:34:14,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 20:34:14,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:34:14,832 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:34:15,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2020-10-15 20:34:15,033 INFO L429 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:34:15,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:34:15,033 INFO L82 PathProgramCache]: Analyzing trace with hash 47318841, now seen corresponding path program 403 times [2020-10-15 20:34:15,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:34:15,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432797420] [2020-10-15 20:34:15,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:34:15,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:34:16,117 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:16,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432797420] [2020-10-15 20:34:16,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374095233] [2020-10-15 20:34:16,118 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 [2020-10-15 20:34:16,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:34:16,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 20:34:16,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:34:16,218 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:16,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:34:16,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-10-15 20:34:16,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737914890] [2020-10-15 20:34:16,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:34:16,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:34:16,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:34:16,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:34:16,219 INFO L87 Difference]: Start difference. First operand 100 states and 253 transitions. Second operand 31 states. [2020-10-15 20:34:19,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:34:19,434 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-10-15 20:34:19,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 20:34:19,437 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-10-15 20:34:19,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:34:19,438 INFO L225 Difference]: With dead ends: 169 [2020-10-15 20:34:19,438 INFO L226 Difference]: Without dead ends: 163 [2020-10-15 20:34:19,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1418, Invalid=3984, Unknown=0, NotChecked=0, Total=5402 [2020-10-15 20:34:19,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-15 20:34:19,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 103. [2020-10-15 20:34:19,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-15 20:34:19,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 261 transitions. [2020-10-15 20:34:19,441 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 261 transitions. Word has length 35 [2020-10-15 20:34:19,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:34:19,441 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 261 transitions. [2020-10-15 20:34:19,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:34:19,441 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 261 transitions. [2020-10-15 20:34:19,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 20:34:19,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:34:19,442 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:34:19,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable404,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:34:19,642 INFO L429 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:34:19,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:34:19,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1923568285, now seen corresponding path program 404 times [2020-10-15 20:34:19,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:34:19,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785498859] [2020-10-15 20:34:19,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:34:19,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:34:20,731 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:20,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785498859] [2020-10-15 20:34:20,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956888018] [2020-10-15 20:34:20,731 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 [2020-10-15 20:34:20,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:34:20,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:34:20,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 20:34:20,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:34:20,850 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:34:20,892 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:20,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:34:20,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-15 20:34:20,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879954507] [2020-10-15 20:34:20,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-15 20:34:20,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:34:20,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-15 20:34:20,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:34:20,893 INFO L87 Difference]: Start difference. First operand 103 states and 261 transitions. Second operand 32 states. [2020-10-15 20:34:24,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:34:24,589 INFO L93 Difference]: Finished difference Result 166 states and 387 transitions. [2020-10-15 20:34:24,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-15 20:34:24,592 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-15 20:34:24,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:34:24,592 INFO L225 Difference]: With dead ends: 166 [2020-10-15 20:34:24,593 INFO L226 Difference]: Without dead ends: 160 [2020-10-15 20:34:24,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1423, Invalid=4127, Unknown=0, NotChecked=0, Total=5550 [2020-10-15 20:34:24,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-15 20:34:24,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 102. [2020-10-15 20:34:24,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-15 20:34:24,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 259 transitions. [2020-10-15 20:34:24,595 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 259 transitions. Word has length 35 [2020-10-15 20:34:24,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:34:24,595 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 259 transitions. [2020-10-15 20:34:24,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-15 20:34:24,595 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 259 transitions. [2020-10-15 20:34:24,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 20:34:24,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:34:24,596 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:34:24,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,402 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:34:24,796 INFO L429 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:34:24,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:34:24,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1683077221, now seen corresponding path program 405 times [2020-10-15 20:34:24,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:34:24,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940845759] [2020-10-15 20:34:24,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:34:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:34:25,858 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:25,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940845759] [2020-10-15 20:34:25,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728727972] [2020-10-15 20:34:25,859 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 [2020-10-15 20:34:25,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-10-15 20:34:25,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:34:25,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 20:34:25,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:34:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:25,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:34:25,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-10-15 20:34:25,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653007563] [2020-10-15 20:34:25,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:34:25,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:34:25,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:34:25,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:34:25,971 INFO L87 Difference]: Start difference. First operand 102 states and 259 transitions. Second operand 31 states. [2020-10-15 20:34:29,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:34:29,515 INFO L93 Difference]: Finished difference Result 167 states and 391 transitions. [2020-10-15 20:34:29,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-15 20:34:29,518 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-10-15 20:34:29,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:34:29,519 INFO L225 Difference]: With dead ends: 167 [2020-10-15 20:34:29,519 INFO L226 Difference]: Without dead ends: 161 [2020-10-15 20:34:29,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1492 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1526, Invalid=4174, Unknown=0, NotChecked=0, Total=5700 [2020-10-15 20:34:29,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-15 20:34:29,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 105. [2020-10-15 20:34:29,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 20:34:29,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 267 transitions. [2020-10-15 20:34:29,522 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 267 transitions. Word has length 35 [2020-10-15 20:34:29,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:34:29,522 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 267 transitions. [2020-10-15 20:34:29,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:34:29,522 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 267 transitions. [2020-10-15 20:34:29,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 20:34:29,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:34:29,522 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:34:29,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:34:29,723 INFO L429 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:34:29,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:34:29,724 INFO L82 PathProgramCache]: Analyzing trace with hash -697885697, now seen corresponding path program 406 times [2020-10-15 20:34:29,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:34:29,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424041866] [2020-10-15 20:34:29,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:34:29,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:34:30,790 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:30,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424041866] [2020-10-15 20:34:30,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941049465] [2020-10-15 20:34:30,791 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 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:34:30,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:34:30,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:34:30,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 20:34:30,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:34:30,914 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:34:30,955 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:30,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:34:30,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-15 20:34:30,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169655764] [2020-10-15 20:34:30,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-15 20:34:30,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:34:30,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-15 20:34:30,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:34:30,957 INFO L87 Difference]: Start difference. First operand 105 states and 267 transitions. Second operand 32 states. [2020-10-15 20:34:34,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:34:34,871 INFO L93 Difference]: Finished difference Result 164 states and 385 transitions. [2020-10-15 20:34:34,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-15 20:34:34,874 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-15 20:34:34,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:34:34,875 INFO L225 Difference]: With dead ends: 164 [2020-10-15 20:34:34,875 INFO L226 Difference]: Without dead ends: 158 [2020-10-15 20:34:34,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1505 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1532, Invalid=4320, Unknown=0, NotChecked=0, Total=5852 [2020-10-15 20:34:34,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-15 20:34:34,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 104. [2020-10-15 20:34:34,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 20:34:34,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 265 transitions. [2020-10-15 20:34:34,878 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 265 transitions. Word has length 35 [2020-10-15 20:34:34,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:34:34,878 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 265 transitions. [2020-10-15 20:34:34,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-15 20:34:34,878 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 265 transitions. [2020-10-15 20:34:34,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 20:34:34,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:34:34,878 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:34:35,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:34:35,079 INFO L429 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:34:35,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:34:35,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1979922557, now seen corresponding path program 407 times [2020-10-15 20:34:35,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:34:35,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965652172] [2020-10-15 20:34:35,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:34:35,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:34:36,131 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:36,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965652172] [2020-10-15 20:34:36,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419352052] [2020-10-15 20:34:36,131 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 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:34:36,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-10-15 20:34:36,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:34:36,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 20:34:36,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:34:36,250 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:36,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:34:36,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-10-15 20:34:36,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306026535] [2020-10-15 20:34:36,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:34:36,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:34:36,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:34:36,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:34:36,251 INFO L87 Difference]: Start difference. First operand 104 states and 265 transitions. Second operand 31 states. [2020-10-15 20:34:39,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:34:39,852 INFO L93 Difference]: Finished difference Result 165 states and 389 transitions. [2020-10-15 20:34:39,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-15 20:34:39,855 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-10-15 20:34:39,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:34:39,856 INFO L225 Difference]: With dead ends: 165 [2020-10-15 20:34:39,856 INFO L226 Difference]: Without dead ends: 159 [2020-10-15 20:34:39,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1650, Invalid=4356, Unknown=0, NotChecked=0, Total=6006 [2020-10-15 20:34:39,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-15 20:34:39,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 107. [2020-10-15 20:34:39,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-15 20:34:39,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 273 transitions. [2020-10-15 20:34:39,858 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 273 transitions. Word has length 35 [2020-10-15 20:34:39,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:34:39,858 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 273 transitions. [2020-10-15 20:34:39,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:34:39,858 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 273 transitions. [2020-10-15 20:34:39,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 20:34:39,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:34:39,859 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:34:40,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2020-10-15 20:34:40,059 INFO L429 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:34:40,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:34:40,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1058155039, now seen corresponding path program 408 times [2020-10-15 20:34:40,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:34:40,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142529326] [2020-10-15 20:34:40,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:34:40,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:34:41,130 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:41,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142529326] [2020-10-15 20:34:41,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568533263] [2020-10-15 20:34:41,131 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 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:34:41,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-10-15 20:34:41,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:34:41,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 20:34:41,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:34:41,259 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:34:41,303 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:41,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:34:41,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-15 20:34:41,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821900733] [2020-10-15 20:34:41,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-15 20:34:41,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:34:41,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-15 20:34:41,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:34:41,304 INFO L87 Difference]: Start difference. First operand 107 states and 273 transitions. Second operand 32 states. [2020-10-15 20:34:45,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:34:45,554 INFO L93 Difference]: Finished difference Result 162 states and 383 transitions. [2020-10-15 20:34:45,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-15 20:34:45,557 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-15 20:34:45,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:34:45,557 INFO L225 Difference]: With dead ends: 162 [2020-10-15 20:34:45,558 INFO L226 Difference]: Without dead ends: 156 [2020-10-15 20:34:45,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1626 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1657, Invalid=4505, Unknown=0, NotChecked=0, Total=6162 [2020-10-15 20:34:45,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-15 20:34:45,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 106. [2020-10-15 20:34:45,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-15 20:34:45,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 271 transitions. [2020-10-15 20:34:45,560 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 271 transitions. Word has length 35 [2020-10-15 20:34:45,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:34:45,560 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 271 transitions. [2020-10-15 20:34:45,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-15 20:34:45,560 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 271 transitions. [2020-10-15 20:34:45,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 20:34:45,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:34:45,561 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:34:45,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,406 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:34:45,762 INFO L429 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:34:45,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:34:45,762 INFO L82 PathProgramCache]: Analyzing trace with hash 558037471, now seen corresponding path program 409 times [2020-10-15 20:34:45,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:34:45,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752176349] [2020-10-15 20:34:45,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:34:45,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:34:46,797 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:46,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752176349] [2020-10-15 20:34:46,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232210664] [2020-10-15 20:34:46,798 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 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:34:46,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:34:46,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 20:34:46,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:34:46,919 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:46,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:34:46,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-10-15 20:34:46,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989882633] [2020-10-15 20:34:46,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:34:46,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:34:46,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:34:46,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:34:46,920 INFO L87 Difference]: Start difference. First operand 106 states and 271 transitions. Second operand 31 states. [2020-10-15 20:34:50,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:34:50,735 INFO L93 Difference]: Finished difference Result 163 states and 387 transitions. [2020-10-15 20:34:50,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-15 20:34:50,739 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-10-15 20:34:50,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:34:50,739 INFO L225 Difference]: With dead ends: 163 [2020-10-15 20:34:50,739 INFO L226 Difference]: Without dead ends: 157 [2020-10-15 20:34:50,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1790, Invalid=4530, Unknown=0, NotChecked=0, Total=6320 [2020-10-15 20:34:50,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-15 20:34:50,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 109. [2020-10-15 20:34:50,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-15 20:34:50,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 279 transitions. [2020-10-15 20:34:50,742 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 279 transitions. Word has length 35 [2020-10-15 20:34:50,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:34:50,743 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 279 transitions. [2020-10-15 20:34:50,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:34:50,743 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 279 transitions. [2020-10-15 20:34:50,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 20:34:50,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:34:50,743 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:34:50,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2020-10-15 20:34:50,944 INFO L429 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:34:50,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:34:50,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1077780547, now seen corresponding path program 410 times [2020-10-15 20:34:50,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:34:50,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907542515] [2020-10-15 20:34:50,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:34:50,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:34:51,996 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:51,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907542515] [2020-10-15 20:34:51,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550248831] [2020-10-15 20:34:51,996 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 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:34:52,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:34:52,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:34:52,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 20:34:52,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:34:52,122 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:34:52,167 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:52,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:34:52,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-15 20:34:52,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994744348] [2020-10-15 20:34:52,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-15 20:34:52,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:34:52,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-15 20:34:52,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:34:52,168 INFO L87 Difference]: Start difference. First operand 109 states and 279 transitions. Second operand 32 states. [2020-10-15 20:34:56,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:34:56,681 INFO L93 Difference]: Finished difference Result 160 states and 381 transitions. [2020-10-15 20:34:56,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-15 20:34:56,685 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-15 20:34:56,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:34:56,685 INFO L225 Difference]: With dead ends: 160 [2020-10-15 20:34:56,685 INFO L226 Difference]: Without dead ends: 154 [2020-10-15 20:34:56,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1798, Invalid=4682, Unknown=0, NotChecked=0, Total=6480 [2020-10-15 20:34:56,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-15 20:34:56,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 108. [2020-10-15 20:34:56,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-15 20:34:56,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 277 transitions. [2020-10-15 20:34:56,688 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 277 transitions. Word has length 35 [2020-10-15 20:34:56,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:34:56,689 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 277 transitions. [2020-10-15 20:34:56,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-15 20:34:56,689 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 277 transitions. [2020-10-15 20:34:56,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 20:34:56,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:34:56,689 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:34:56,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 408 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2020-10-15 20:34:56,890 INFO L429 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:34:56,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:34:56,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1561875519, now seen corresponding path program 411 times [2020-10-15 20:34:56,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:34:56,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974935011] [2020-10-15 20:34:56,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:34:56,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:34:57,942 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:57,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974935011] [2020-10-15 20:34:57,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086615799] [2020-10-15 20:34:57,943 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 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:34:58,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-10-15 20:34:58,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:34:58,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 20:34:58,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:34:58,071 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:58,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:34:58,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-10-15 20:34:58,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979294755] [2020-10-15 20:34:58,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:34:58,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:34:58,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:34:58,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:34:58,072 INFO L87 Difference]: Start difference. First operand 108 states and 277 transitions. Second operand 31 states. [2020-10-15 20:35:02,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:35:02,061 INFO L93 Difference]: Finished difference Result 161 states and 385 transitions. [2020-10-15 20:35:02,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-15 20:35:02,065 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-10-15 20:35:02,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:35:02,065 INFO L225 Difference]: With dead ends: 161 [2020-10-15 20:35:02,065 INFO L226 Difference]: Without dead ends: 155 [2020-10-15 20:35:02,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1876 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1946, Invalid=4696, Unknown=0, NotChecked=0, Total=6642 [2020-10-15 20:35:02,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-15 20:35:02,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 111. [2020-10-15 20:35:02,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 20:35:02,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 20:35:02,068 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 35 [2020-10-15 20:35:02,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:35:02,068 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 20:35:02,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:35:02,069 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 20:35:02,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 20:35:02,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:35:02,069 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:35:02,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2020-10-15 20:35:02,270 INFO L429 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:35:02,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:35:02,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1012964133, now seen corresponding path program 412 times [2020-10-15 20:35:02,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:35:02,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142263314] [2020-10-15 20:35:02,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:35:02,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:35:03,329 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:35:03,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142263314] [2020-10-15 20:35:03,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225955085] [2020-10-15 20:35:03,330 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 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:35:03,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:35:03,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:35:03,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 20:35:03,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:35:03,454 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:35:03,501 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:35:03,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:35:03,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-15 20:35:03,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316387927] [2020-10-15 20:35:03,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-15 20:35:03,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:35:03,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-15 20:35:03,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:35:03,502 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 32 states. [2020-10-15 20:35:08,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:35:08,276 INFO L93 Difference]: Finished difference Result 158 states and 379 transitions. [2020-10-15 20:35:08,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-15 20:35:08,280 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-15 20:35:08,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:35:08,280 INFO L225 Difference]: With dead ends: 158 [2020-10-15 20:35:08,280 INFO L226 Difference]: Without dead ends: 152 [2020-10-15 20:35:08,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1880 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1955, Invalid=4851, Unknown=0, NotChecked=0, Total=6806 [2020-10-15 20:35:08,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-15 20:35:08,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 110. [2020-10-15 20:35:08,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 20:35:08,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 20:35:08,284 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 35 [2020-10-15 20:35:08,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:35:08,284 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 20:35:08,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-15 20:35:08,284 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 20:35:08,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 20:35:08,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:35:08,284 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:35:08,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2020-10-15 20:35:08,485 INFO L429 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:35:08,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:35:08,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1483959843, now seen corresponding path program 413 times [2020-10-15 20:35:08,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:35:08,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202887946] [2020-10-15 20:35:08,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:35:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:35:09,552 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:35:09,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202887946] [2020-10-15 20:35:09,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840486709] [2020-10-15 20:35:09,553 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 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:35:09,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-10-15 20:35:09,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:35:09,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 20:35:09,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:35:09,706 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:35:09,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:35:09,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-10-15 20:35:09,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737006653] [2020-10-15 20:35:09,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:35:09,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:35:09,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:35:09,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:35:09,708 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 31 states. [2020-10-15 20:35:13,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:35:13,972 INFO L93 Difference]: Finished difference Result 159 states and 383 transitions. [2020-10-15 20:35:13,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-15 20:35:13,976 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-10-15 20:35:13,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:35:13,977 INFO L225 Difference]: With dead ends: 159 [2020-10-15 20:35:13,977 INFO L226 Difference]: Without dead ends: 153 [2020-10-15 20:35:13,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2012 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2118, Invalid=4854, Unknown=0, NotChecked=0, Total=6972 [2020-10-15 20:35:13,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-15 20:35:13,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 113. [2020-10-15 20:35:13,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-15 20:35:13,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 291 transitions. [2020-10-15 20:35:13,980 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 291 transitions. Word has length 35 [2020-10-15 20:35:13,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:35:13,980 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 291 transitions. [2020-10-15 20:35:13,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:35:13,980 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 291 transitions. [2020-10-15 20:35:13,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 20:35:13,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:35:13,981 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:35:14,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:35:14,181 INFO L429 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:35:14,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:35:14,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1500046983, now seen corresponding path program 414 times [2020-10-15 20:35:14,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:35:14,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051231820] [2020-10-15 20:35:14,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:35:14,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:35:15,266 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:35:15,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051231820] [2020-10-15 20:35:15,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931283548] [2020-10-15 20:35:15,267 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 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:35:15,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-10-15 20:35:15,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:35:15,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 20:35:15,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:35:15,401 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:35:15,451 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:35:15,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:35:15,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-15 20:35:15,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101376230] [2020-10-15 20:35:15,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-15 20:35:15,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:35:15,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-15 20:35:15,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=783, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:35:15,452 INFO L87 Difference]: Start difference. First operand 113 states and 291 transitions. Second operand 32 states. [2020-10-15 20:35:20,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:35:20,462 INFO L93 Difference]: Finished difference Result 156 states and 377 transitions. [2020-10-15 20:35:20,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-15 20:35:20,465 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-15 20:35:20,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:35:20,466 INFO L225 Difference]: With dead ends: 156 [2020-10-15 20:35:20,466 INFO L226 Difference]: Without dead ends: 150 [2020-10-15 20:35:20,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2013 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=2128, Invalid=5012, Unknown=0, NotChecked=0, Total=7140 [2020-10-15 20:35:20,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-15 20:35:20,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 112. [2020-10-15 20:35:20,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-15 20:35:20,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 289 transitions. [2020-10-15 20:35:20,469 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 289 transitions. Word has length 35 [2020-10-15 20:35:20,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:35:20,469 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 289 transitions. [2020-10-15 20:35:20,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-15 20:35:20,469 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 289 transitions. [2020-10-15 20:35:20,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 20:35:20,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:35:20,470 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:35:20,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2020-10-15 20:35:20,670 INFO L429 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:35:20,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:35:20,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1500537093, now seen corresponding path program 415 times [2020-10-15 20:35:20,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:35:20,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563531738] [2020-10-15 20:35:20,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:35:20,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:35:21,762 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:35:21,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563531738] [2020-10-15 20:35:21,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869412064] [2020-10-15 20:35:21,763 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 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:35:21,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:35:21,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 20:35:21,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:35:21,894 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:35:21,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:35:21,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-10-15 20:35:21,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663195003] [2020-10-15 20:35:21,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:35:21,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:35:21,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:35:21,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:35:21,895 INFO L87 Difference]: Start difference. First operand 112 states and 289 transitions. Second operand 31 states. [2020-10-15 20:35:26,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:35:26,256 INFO L93 Difference]: Finished difference Result 176 states and 427 transitions. [2020-10-15 20:35:26,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-15 20:35:26,260 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-10-15 20:35:26,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:35:26,260 INFO L225 Difference]: With dead ends: 176 [2020-10-15 20:35:26,260 INFO L226 Difference]: Without dead ends: 170 [2020-10-15 20:35:26,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2152 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2306, Invalid=5004, Unknown=0, NotChecked=0, Total=7310 [2020-10-15 20:35:26,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-15 20:35:26,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 118. [2020-10-15 20:35:26,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 20:35:26,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 309 transitions. [2020-10-15 20:35:26,263 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 309 transitions. Word has length 35 [2020-10-15 20:35:26,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:35:26,263 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 309 transitions. [2020-10-15 20:35:26,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:35:26,263 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 309 transitions. [2020-10-15 20:35:26,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 20:35:26,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:35:26,263 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:35:26,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:35:26,464 INFO L429 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:35:26,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:35:26,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1500553833, now seen corresponding path program 416 times [2020-10-15 20:35:26,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:35:26,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375356266] [2020-10-15 20:35:26,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:35:26,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:35:27,556 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:35:27,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375356266] [2020-10-15 20:35:27,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784515244] [2020-10-15 20:35:27,557 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 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:35:27,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:35:27,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:35:27,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-15 20:35:27,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:35:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:35:27,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:35:27,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-15 20:35:27,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498756951] [2020-10-15 20:35:27,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-15 20:35:27,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:35:27,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-15 20:35:27,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:35:27,764 INFO L87 Difference]: Start difference. First operand 118 states and 309 transitions. Second operand 32 states. [2020-10-15 20:35:32,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:35:32,694 INFO L93 Difference]: Finished difference Result 157 states and 383 transitions. [2020-10-15 20:35:32,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-15 20:35:32,698 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-15 20:35:32,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:35:32,698 INFO L225 Difference]: With dead ends: 157 [2020-10-15 20:35:32,698 INFO L226 Difference]: Without dead ends: 149 [2020-10-15 20:35:32,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2041 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=2080, Invalid=5402, Unknown=0, NotChecked=0, Total=7482 [2020-10-15 20:35:32,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-15 20:35:32,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 115. [2020-10-15 20:35:32,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-15 20:35:32,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 297 transitions. [2020-10-15 20:35:32,701 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 297 transitions. Word has length 35 [2020-10-15 20:35:32,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:35:32,702 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 297 transitions. [2020-10-15 20:35:32,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-15 20:35:32,702 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 297 transitions. [2020-10-15 20:35:32,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-15 20:35:32,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:35:32,702 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:35:32,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable417 [2020-10-15 20:35:32,903 INFO L429 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:35:32,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:35:32,903 INFO L82 PathProgramCache]: Analyzing trace with hash 581302646, now seen corresponding path program 417 times [2020-10-15 20:35:32,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:35:32,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114842949] [2020-10-15 20:35:32,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:35:32,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:35:34,382 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:35:34,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114842949] [2020-10-15 20:35:34,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498330962] [2020-10-15 20:35:34,383 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 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:35:34,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-10-15 20:35:34,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:35:34,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-15 20:35:34,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:35:34,467 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:35:34,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:35:34,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-10-15 20:35:34,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567737064] [2020-10-15 20:35:34,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-15 20:35:34,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:35:34,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-15 20:35:34,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=748, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:35:34,468 INFO L87 Difference]: Start difference. First operand 115 states and 297 transitions. Second operand 32 states. [2020-10-15 20:35:36,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:35:36,798 INFO L93 Difference]: Finished difference Result 184 states and 435 transitions. [2020-10-15 20:35:36,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 20:35:36,801 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 36 [2020-10-15 20:35:36,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:35:36,802 INFO L225 Difference]: With dead ends: 184 [2020-10-15 20:35:36,802 INFO L226 Difference]: Without dead ends: 178 [2020-10-15 20:35:36,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1119, Invalid=2541, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 20:35:36,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-15 20:35:36,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 117. [2020-10-15 20:35:36,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-15 20:35:36,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 301 transitions. [2020-10-15 20:35:36,805 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 301 transitions. Word has length 36 [2020-10-15 20:35:36,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:35:36,805 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 301 transitions. [2020-10-15 20:35:36,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-15 20:35:36,805 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 301 transitions. [2020-10-15 20:35:36,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-15 20:35:36,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:35:36,805 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:35:37,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2020-10-15 20:35:37,006 INFO L429 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:35:37,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:35:37,006 INFO L82 PathProgramCache]: Analyzing trace with hash 462521818, now seen corresponding path program 418 times [2020-10-15 20:35:37,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:35:37,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842932238] [2020-10-15 20:35:37,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:35:37,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:35:38,508 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:35:38,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842932238] [2020-10-15 20:35:38,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595384997] [2020-10-15 20:35:38,508 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 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:35:38,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:35:38,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:35:38,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-15 20:35:38,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:35:38,634 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:35:38,656 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:35:38,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:35:38,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-10-15 20:35:38,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329904919] [2020-10-15 20:35:38,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-15 20:35:38,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:35:38,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-15 20:35:38,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=821, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 20:35:38,657 INFO L87 Difference]: Start difference. First operand 117 states and 301 transitions. Second operand 33 states. [2020-10-15 20:35:41,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:35:41,176 INFO L93 Difference]: Finished difference Result 181 states and 429 transitions. [2020-10-15 20:35:41,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:35:41,179 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-10-15 20:35:41,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:35:41,180 INFO L225 Difference]: With dead ends: 181 [2020-10-15 20:35:41,180 INFO L226 Difference]: Without dead ends: 175 [2020-10-15 20:35:41,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1181, Invalid=2851, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 20:35:41,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-15 20:35:41,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 116. [2020-10-15 20:35:41,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-15 20:35:41,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 299 transitions. [2020-10-15 20:35:41,183 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 299 transitions. Word has length 36 [2020-10-15 20:35:41,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:35:41,183 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 299 transitions. [2020-10-15 20:35:41,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-15 20:35:41,183 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 299 transitions. [2020-10-15 20:35:41,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-15 20:35:41,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:35:41,183 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:35:41,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:35:41,384 INFO L429 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:35:41,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:35:41,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1259398744, now seen corresponding path program 419 times [2020-10-15 20:35:41,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:35:41,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490607035] [2020-10-15 20:35:41,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:35:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:35:42,811 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:35:42,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490607035] [2020-10-15 20:35:42,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278859068] [2020-10-15 20:35:42,811 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 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:35:42,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-10-15 20:35:42,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:35:42,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-15 20:35:42,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:35:42,905 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:35:42,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:35:42,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-10-15 20:35:42,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768013477] [2020-10-15 20:35:42,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-15 20:35:42,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:35:42,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-15 20:35:42,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=772, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:35:42,906 INFO L87 Difference]: Start difference. First operand 116 states and 299 transitions. Second operand 32 states. [2020-10-15 20:35:45,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:35:45,429 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-10-15 20:35:45,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:35:45,432 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 36 [2020-10-15 20:35:45,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:35:45,432 INFO L225 Difference]: With dead ends: 178 [2020-10-15 20:35:45,432 INFO L226 Difference]: Without dead ends: 172 [2020-10-15 20:35:45,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1116, Invalid=2790, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 20:35:45,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-15 20:35:45,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 117. [2020-10-15 20:35:45,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-15 20:35:45,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 301 transitions. [2020-10-15 20:35:45,435 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 301 transitions. Word has length 36 [2020-10-15 20:35:45,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:35:45,435 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 301 transitions. [2020-10-15 20:35:45,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-15 20:35:45,436 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 301 transitions. [2020-10-15 20:35:45,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-15 20:35:45,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:35:45,436 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:35:45,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2020-10-15 20:35:45,637 INFO L429 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:35:45,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:35:45,637 INFO L82 PathProgramCache]: Analyzing trace with hash 830225340, now seen corresponding path program 420 times [2020-10-15 20:35:45,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:35:45,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933020069] [2020-10-15 20:35:45,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:35:45,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:35:47,069 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:35:47,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933020069] [2020-10-15 20:35:47,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361198897] [2020-10-15 20:35:47,070 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 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:35:47,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-10-15 20:35:47,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:35:47,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-15 20:35:47,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:35:47,200 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:35:47,226 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:35:47,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:35:47,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-10-15 20:35:47,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502414907] [2020-10-15 20:35:47,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-15 20:35:47,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:35:47,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-15 20:35:47,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=844, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 20:35:47,227 INFO L87 Difference]: Start difference. First operand 117 states and 301 transitions. Second operand 33 states. [2020-10-15 20:35:50,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:35:50,088 INFO L93 Difference]: Finished difference Result 177 states and 421 transitions. [2020-10-15 20:35:50,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 20:35:50,091 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-10-15 20:35:50,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:35:50,092 INFO L225 Difference]: With dead ends: 177 [2020-10-15 20:35:50,092 INFO L226 Difference]: Without dead ends: 171 [2020-10-15 20:35:50,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1185, Invalid=3105, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 20:35:50,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-15 20:35:50,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 116. [2020-10-15 20:35:50,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-15 20:35:50,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 299 transitions. [2020-10-15 20:35:50,095 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 299 transitions. Word has length 36 [2020-10-15 20:35:50,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:35:50,095 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 299 transitions. [2020-10-15 20:35:50,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-15 20:35:50,095 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 299 transitions. [2020-10-15 20:35:50,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-15 20:35:50,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:35:50,095 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:35:50,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable421,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:35:50,296 INFO L429 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:35:50,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:35:50,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1984584774, now seen corresponding path program 421 times [2020-10-15 20:35:50,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:35:50,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700596144] [2020-10-15 20:35:50,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:35:50,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:35:51,637 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:35:51,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700596144] [2020-10-15 20:35:51,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3055532] [2020-10-15 20:35:51,638 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 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:35:51,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:35:51,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-15 20:35:51,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:35:51,720 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:35:51,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:35:51,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-10-15 20:35:51,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611101951] [2020-10-15 20:35:51,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-15 20:35:51,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:35:51,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-15 20:35:51,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:35:51,721 INFO L87 Difference]: Start difference. First operand 116 states and 299 transitions. Second operand 32 states. [2020-10-15 20:35:54,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:35:54,434 INFO L93 Difference]: Finished difference Result 174 states and 415 transitions. [2020-10-15 20:35:54,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 20:35:54,437 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 36 [2020-10-15 20:35:54,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:35:54,438 INFO L225 Difference]: With dead ends: 174 [2020-10-15 20:35:54,438 INFO L226 Difference]: Without dead ends: 168 [2020-10-15 20:35:54,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1129, Invalid=3031, Unknown=0, NotChecked=0, Total=4160 [2020-10-15 20:35:54,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-15 20:35:54,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 117. [2020-10-15 20:35:54,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-15 20:35:54,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 301 transitions. [2020-10-15 20:35:54,441 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 301 transitions. Word has length 36 [2020-10-15 20:35:54,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:35:54,441 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 301 transitions. [2020-10-15 20:35:54,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-15 20:35:54,441 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 301 transitions. [2020-10-15 20:35:54,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-15 20:35:54,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:35:54,442 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:35:54,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2020-10-15 20:35:54,649 INFO L429 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:35:54,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:35:54,650 INFO L82 PathProgramCache]: Analyzing trace with hash 486474270, now seen corresponding path program 422 times [2020-10-15 20:35:54,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:35:54,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096753464] [2020-10-15 20:35:54,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:35:54,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:35:56,002 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:35:56,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096753464] [2020-10-15 20:35:56,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109014803] [2020-10-15 20:35:56,003 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 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:35:56,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:35:56,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:35:56,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-15 20:35:56,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:35:56,124 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:35:56,152 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:35:56,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:35:56,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-10-15 20:35:56,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203707916] [2020-10-15 20:35:56,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-15 20:35:56,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:35:56,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-15 20:35:56,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 20:35:56,153 INFO L87 Difference]: Start difference. First operand 117 states and 301 transitions. Second operand 33 states. Received shutdown request... [2020-10-15 20:35:57,346 WARN L210 SmtUtils]: Removed 1 from assertion stack [2020-10-15 20:35:57,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:35:57,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:35:57,547 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-15 20:35:57,551 WARN L235 ceAbstractionStarter]: Timeout [2020-10-15 20:35:57,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:35:57 BasicIcfg [2020-10-15 20:35:57,551 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-15 20:35:57,554 INFO L168 Benchmark]: Toolchain (without parser) took 854682.18 ms. Allocated memory was 253.2 MB in the beginning and 229.6 MB in the end (delta: -23.6 MB). Free memory was 207.7 MB in the beginning and 149.4 MB in the end (delta: 58.4 MB). Peak memory consumption was 34.8 MB. Max. memory is 14.2 GB. [2020-10-15 20:35:57,554 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 253.2 MB. Free memory is still 229.6 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-15 20:35:57,555 INFO L168 Benchmark]: CACSL2BoogieTranslator took 683.71 ms. Allocated memory was 253.2 MB in the beginning and 320.9 MB in the end (delta: 67.6 MB). Free memory was 207.7 MB in the beginning and 276.3 MB in the end (delta: -68.5 MB). Peak memory consumption was 32.8 MB. Max. memory is 14.2 GB. [2020-10-15 20:35:57,555 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.40 ms. Allocated memory is still 320.9 MB. Free memory is still 276.3 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-15 20:35:57,555 INFO L168 Benchmark]: Boogie Preprocessor took 25.46 ms. Allocated memory is still 320.9 MB. Free memory was 276.3 MB in the beginning and 273.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-15 20:35:57,556 INFO L168 Benchmark]: RCFGBuilder took 391.83 ms. Allocated memory is still 320.9 MB. Free memory was 273.8 MB in the beginning and 254.2 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 14.2 GB. [2020-10-15 20:35:57,556 INFO L168 Benchmark]: TraceAbstraction took 853533.59 ms. Allocated memory was 320.9 MB in the beginning and 229.6 MB in the end (delta: -91.2 MB). Free memory was 251.7 MB in the beginning and 149.4 MB in the end (delta: 102.3 MB). Peak memory consumption was 11.1 MB. Max. memory is 14.2 GB. [2020-10-15 20:35:57,558 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 253.2 MB. Free memory is still 229.6 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 683.71 ms. Allocated memory was 253.2 MB in the beginning and 320.9 MB in the end (delta: 67.6 MB). Free memory was 207.7 MB in the beginning and 276.3 MB in the end (delta: -68.5 MB). Peak memory consumption was 32.8 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 42.40 ms. Allocated memory is still 320.9 MB. Free memory is still 276.3 MB. There was no memory consumed. Max. memory is 14.2 GB. * Boogie Preprocessor took 25.46 ms. Allocated memory is still 320.9 MB. Free memory was 276.3 MB in the beginning and 273.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 391.83 ms. Allocated memory is still 320.9 MB. Free memory was 273.8 MB in the beginning and 254.2 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 14.2 GB. * TraceAbstraction took 853533.59 ms. Allocated memory was 320.9 MB in the beginning and 229.6 MB in the end (delta: -91.2 MB). Free memory was 251.7 MB in the beginning and 149.4 MB in the end (delta: 102.3 MB). Peak memory consumption was 11.1 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: 0.0s, 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 (117states) and FLOYD_HOARE automaton (currently 15 states, 33 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 15 for 0ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 853.4s, OverallIterations: 424, TraceHistogramMax: 14, AutomataDifference: 551.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.2s, HoareTripleCheckerStatistics: 6836 SDtfs, 30123 SDslu, 51194 SDs, 0 SdLazy, 59096 SolverSat, 44007 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 61.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 31154 GetRequests, 9955 SyntacticMatches, 419 SemanticMatches, 20779 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289686 ImplicationChecksByTransitivity, 609.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=118occurred in iteration=417, 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, 423 MinimizatonAttempts, 13996 StatesRemovedByMinimization, 422 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3.2s SsaConstructionTime, 10.3s SatisfiabilityAnalysisTime, 189.0s InterpolantComputationTime, 22074 NumberOfCodeBlocks, 22074 NumberOfCodeBlocksAsserted, 2738 NumberOfCheckSat, 21231 ConstructedInterpolants, 0 QuantifiedInterpolants, 2666173 SizeOfPredicates, 7663 NumberOfNonLiveVariables, 65131 ConjunctsInSsa, 9346 ConjunctsInUnsatCore, 843 InterpolantComputations, 5 PerfectInterpolantSequences, 0/71526 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