/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-507b705 [2020-09-11 12:06:35,407 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-11 12:06:35,411 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-11 12:06:35,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-11 12:06:35,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-11 12:06:35,439 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-11 12:06:35,440 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-11 12:06:35,442 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-11 12:06:35,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-11 12:06:35,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-11 12:06:35,445 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-11 12:06:35,447 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-11 12:06:35,447 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-11 12:06:35,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-11 12:06:35,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-11 12:06:35,450 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-11 12:06:35,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-11 12:06:35,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-11 12:06:35,454 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-11 12:06:35,455 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-11 12:06:35,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-11 12:06:35,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-11 12:06:35,459 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-11 12:06:35,460 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-11 12:06:35,465 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-11 12:06:35,465 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-11 12:06:35,465 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-11 12:06:35,466 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-11 12:06:35,466 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-11 12:06:35,471 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-11 12:06:35,471 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-11 12:06:35,472 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-11 12:06:35,472 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-11 12:06:35,475 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-11 12:06:35,477 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-11 12:06:35,477 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-11 12:06:35,478 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-11 12:06:35,478 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-11 12:06:35,479 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-11 12:06:35,480 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-11 12:06:35,480 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-11 12:06:35,482 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-11 12:06:35,538 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-11 12:06:35,538 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-11 12:06:35,540 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-11 12:06:35,543 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-11 12:06:35,543 INFO L138 SettingsManager]: * Use SBE=true [2020-09-11 12:06:35,543 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-11 12:06:35,544 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-11 12:06:35,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-11 12:06:35,544 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-11 12:06:35,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-11 12:06:35,544 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-11 12:06:35,546 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-11 12:06:35,546 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-11 12:06:35,546 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-11 12:06:35,546 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-11 12:06:35,546 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-11 12:06:35,547 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-11 12:06:35,547 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-11 12:06:35,547 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-11 12:06:35,547 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-11 12:06:35,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-11 12:06:35,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-11 12:06:35,548 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-11 12:06:35,549 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-11 12:06:35,549 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-11 12:06:35,549 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-11 12:06:35,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-11 12:06:35,549 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-11 12:06:35,550 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-11 12:06:35,550 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-11 12:06:36,046 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-11 12:06:36,067 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-11 12:06:36,074 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-11 12:06:36,077 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-11 12:06:36,077 INFO L275 PluginConnector]: CDTParser initialized [2020-09-11 12:06:36,079 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-09-11 12:06:36,163 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a16ad40c0/3856620b491e4cfe83dd73fae91718e1/FLAG92191ea00 [2020-09-11 12:06:36,771 INFO L306 CDTParser]: Found 1 translation units. [2020-09-11 12:06:36,772 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-09-11 12:06:36,787 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a16ad40c0/3856620b491e4cfe83dd73fae91718e1/FLAG92191ea00 [2020-09-11 12:06:37,045 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a16ad40c0/3856620b491e4cfe83dd73fae91718e1 [2020-09-11 12:06:37,061 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-11 12:06:37,068 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-11 12:06:37,069 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-11 12:06:37,069 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-11 12:06:37,074 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-11 12:06:37,075 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 12:06:37" (1/1) ... [2020-09-11 12:06:37,080 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6863c813 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:37, skipping insertion in model container [2020-09-11 12:06:37,080 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 12:06:37" (1/1) ... [2020-09-11 12:06:37,090 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-11 12:06:37,139 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-11 12:06:37,693 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 12:06:37,709 INFO L203 MainTranslator]: Completed pre-run [2020-09-11 12:06:37,786 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 12:06:37,863 INFO L208 MainTranslator]: Completed translation [2020-09-11 12:06:37,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:37 WrapperNode [2020-09-11 12:06:37,864 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-11 12:06:37,865 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-11 12:06:37,865 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-11 12:06:37,866 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-11 12:06:37,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:37" (1/1) ... [2020-09-11 12:06:37,911 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:37" (1/1) ... [2020-09-11 12:06:37,938 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-11 12:06:37,939 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-11 12:06:37,939 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-11 12:06:37,939 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-11 12:06:37,949 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:37" (1/1) ... [2020-09-11 12:06:37,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:37" (1/1) ... [2020-09-11 12:06:37,952 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:37" (1/1) ... [2020-09-11 12:06:37,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:37" (1/1) ... [2020-09-11 12:06:37,959 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:37" (1/1) ... [2020-09-11 12:06:37,966 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:37" (1/1) ... [2020-09-11 12:06:37,968 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:37" (1/1) ... [2020-09-11 12:06:37,971 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-11 12:06:37,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-11 12:06:37,972 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-11 12:06:37,972 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-11 12:06:37,974 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:37" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:06:38,053 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-11 12:06:38,053 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-11 12:06:38,053 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-11 12:06:38,053 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-11 12:06:38,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-11 12:06:38,054 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-11 12:06:38,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-11 12:06:38,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-11 12:06:38,054 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-11 12:06:38,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-11 12:06:38,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-11 12:06:38,057 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-11 12:06:38,430 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-11 12:06:38,437 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-11 12:06:38,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 12:06:38 BoogieIcfgContainer [2020-09-11 12:06:38,442 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-11 12:06:38,444 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-11 12:06:38,444 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-11 12:06:38,448 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-11 12:06:38,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 12:06:37" (1/3) ... [2020-09-11 12:06:38,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14def5fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 12:06:38, skipping insertion in model container [2020-09-11 12:06:38,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:37" (2/3) ... [2020-09-11 12:06:38,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14def5fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 12:06:38, skipping insertion in model container [2020-09-11 12:06:38,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 12:06:38" (3/3) ... [2020-09-11 12:06:38,453 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2020-09-11 12:06:38,465 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-11 12:06:38,465 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-11 12:06:38,476 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-11 12:06:38,477 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-11 12:06:38,509 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,510 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,510 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,510 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,511 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,511 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,511 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,512 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,512 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,512 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,513 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,513 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,513 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,513 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,514 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,514 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,514 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,515 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,515 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,515 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,516 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,516 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,516 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,517 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,517 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,517 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,517 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,518 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,523 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,523 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,524 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,524 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,524 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,524 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,532 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,532 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,533 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,533 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,533 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,533 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:38,558 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-11 12:06:38,584 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-11 12:06:38,585 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-11 12:06:38,585 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-11 12:06:38,585 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-11 12:06:38,585 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-11 12:06:38,585 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-11 12:06:38,586 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-11 12:06:38,586 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-11 12:06:38,602 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-09-11 12:06:38,604 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-11 12:06:38,648 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-11 12:06:38,648 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-11 12:06:38,655 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. [2020-09-11 12:06:38,658 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-11 12:06:38,678 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-11 12:06:38,678 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-11 12:06:38,679 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. [2020-09-11 12:06:38,681 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-09-11 12:06:38,682 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-09-11 12:06:39,831 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-09-11 12:06:40,066 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-09-11 12:06:40,066 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-09-11 12:06:40,071 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-11 12:06:40,097 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-11 12:06:40,100 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-11 12:06:40,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-11 12:06:40,117 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:40,118 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-11 12:06:40,119 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:40,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:40,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-09-11 12:06:40,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:40,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275225372] [2020-09-11 12:06:40,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:40,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:40,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:40,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275225372] [2020-09-11 12:06:40,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:06:40,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-11 12:06:40,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124641041] [2020-09-11 12:06:40,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-11 12:06:40,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:40,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-11 12:06:40,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-11 12:06:40,467 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-11 12:06:40,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:40,549 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-09-11 12:06:40,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-11 12:06:40,551 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-11 12:06:40,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:40,567 INFO L225 Difference]: With dead ends: 75 [2020-09-11 12:06:40,568 INFO L226 Difference]: Without dead ends: 42 [2020-09-11 12:06:40,569 INFO L675 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 [2020-09-11 12:06:40,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-11 12:06:40,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-11 12:06:40,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 12:06:40,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-09-11 12:06:40,621 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-09-11 12:06:40,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:40,622 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-09-11 12:06:40,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-11 12:06:40,622 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-09-11 12:06:40,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-11 12:06:40,623 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:40,623 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:40,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-11 12:06:40,624 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:40,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:40,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-09-11 12:06:40,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:40,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071877460] [2020-09-11 12:06:40,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:40,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:40,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:40,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071877460] [2020-09-11 12:06:40,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:06:40,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 12:06:40,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908833529] [2020-09-11 12:06:40,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-11 12:06:40,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:40,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-11 12:06:40,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-11 12:06:40,733 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-09-11 12:06:40,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:40,771 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-09-11 12:06:40,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-11 12:06:40,772 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-11 12:06:40,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:40,773 INFO L225 Difference]: With dead ends: 56 [2020-09-11 12:06:40,774 INFO L226 Difference]: Without dead ends: 50 [2020-09-11 12:06:40,775 INFO L675 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 [2020-09-11 12:06:40,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-11 12:06:40,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-11 12:06:40,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 12:06:40,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-09-11 12:06:40,783 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-09-11 12:06:40,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:40,785 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-09-11 12:06:40,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-11 12:06:40,785 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-09-11 12:06:40,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:06:40,786 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:40,786 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:40,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-11 12:06:40,787 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:40,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:40,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-09-11 12:06:40,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:40,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296841725] [2020-09-11 12:06:40,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:40,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:40,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:40,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296841725] [2020-09-11 12:06:40,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:06:40,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 12:06:40,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019124186] [2020-09-11 12:06:40,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 12:06:40,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:40,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 12:06:40,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-11 12:06:40,888 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-09-11 12:06:40,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:40,973 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-09-11 12:06:40,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 12:06:40,973 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 12:06:40,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:40,975 INFO L225 Difference]: With dead ends: 78 [2020-09-11 12:06:40,975 INFO L226 Difference]: Without dead ends: 71 [2020-09-11 12:06:40,975 INFO L675 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 [2020-09-11 12:06:40,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-11 12:06:40,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-09-11 12:06:40,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 12:06:40,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-11 12:06:40,984 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-09-11 12:06:40,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:40,985 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-11 12:06:40,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 12:06:40,985 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-11 12:06:40,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:06:40,986 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:40,986 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:40,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-11 12:06:40,987 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:40,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:40,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-09-11 12:06:40,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:40,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838559456] [2020-09-11 12:06:40,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:41,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:41,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:41,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838559456] [2020-09-11 12:06:41,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:06:41,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 12:06:41,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659615435] [2020-09-11 12:06:41,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 12:06:41,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:41,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 12:06:41,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-11 12:06:41,079 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-09-11 12:06:41,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:41,182 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-11 12:06:41,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 12:06:41,185 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 12:06:41,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:41,186 INFO L225 Difference]: With dead ends: 54 [2020-09-11 12:06:41,186 INFO L226 Difference]: Without dead ends: 43 [2020-09-11 12:06:41,187 INFO L675 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 [2020-09-11 12:06:41,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-11 12:06:41,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-11 12:06:41,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-11 12:06:41,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-09-11 12:06:41,194 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-09-11 12:06:41,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:41,194 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-09-11 12:06:41,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 12:06:41,194 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-09-11 12:06:41,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:06:41,195 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:41,195 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:41,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-11 12:06:41,196 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:41,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:41,196 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-09-11 12:06:41,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:41,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396814321] [2020-09-11 12:06:41,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:41,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:41,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:41,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396814321] [2020-09-11 12:06:41,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:06:41,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 12:06:41,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769905734] [2020-09-11 12:06:41,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 12:06:41,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:41,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 12:06:41,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-11 12:06:41,272 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-09-11 12:06:41,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:41,348 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-09-11 12:06:41,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 12:06:41,348 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 12:06:41,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:41,349 INFO L225 Difference]: With dead ends: 57 [2020-09-11 12:06:41,350 INFO L226 Difference]: Without dead ends: 51 [2020-09-11 12:06:41,350 INFO L675 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 [2020-09-11 12:06:41,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-11 12:06:41,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-09-11 12:06:41,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-11 12:06:41,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-11 12:06:41,356 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-09-11 12:06:41,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:41,357 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-11 12:06:41,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 12:06:41,357 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-11 12:06:41,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:06:41,358 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:41,358 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:41,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-11 12:06:41,359 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:41,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:41,359 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-09-11 12:06:41,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:41,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124324963] [2020-09-11 12:06:41,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:41,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:41,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124324963] [2020-09-11 12:06:41,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050506934] [2020-09-11 12:06:41,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:06:41,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:06:41,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:41,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 12:06:41,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:41,620 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:06:41,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:41,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:41,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-11 12:06:41,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003370345] [2020-09-11 12:06:41,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 12:06:41,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:41,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 12:06:41,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-11 12:06:41,643 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-09-11 12:06:41,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:41,758 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-09-11 12:06:41,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 12:06:41,759 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-11 12:06:41,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:41,760 INFO L225 Difference]: With dead ends: 48 [2020-09-11 12:06:41,760 INFO L226 Difference]: Without dead ends: 43 [2020-09-11 12:06:41,761 INFO L675 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 [2020-09-11 12:06:41,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-11 12:06:41,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-11 12:06:41,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-11 12:06:41,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-09-11 12:06:41,766 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-09-11 12:06:41,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:41,767 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-09-11 12:06:41,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 12:06:41,767 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-09-11 12:06:41,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:06:41,768 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:41,768 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:41,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-11 12:06:41,983 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:41,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:41,984 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-09-11 12:06:41,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:41,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421591105] [2020-09-11 12:06:41,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:42,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:42,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:42,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421591105] [2020-09-11 12:06:42,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051805254] [2020-09-11 12:06:42,077 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:06:42,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:42,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:42,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 12:06:42,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:42,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:42,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:42,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-11 12:06:42,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931682233] [2020-09-11 12:06:42,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-11 12:06:42,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:42,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-11 12:06:42,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-11 12:06:42,156 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-09-11 12:06:42,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:42,237 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-11 12:06:42,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 12:06:42,238 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-11 12:06:42,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:42,239 INFO L225 Difference]: With dead ends: 54 [2020-09-11 12:06:42,239 INFO L226 Difference]: Without dead ends: 48 [2020-09-11 12:06:42,239 INFO L675 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 [2020-09-11 12:06:42,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-11 12:06:42,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-09-11 12:06:42,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 12:06:42,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-09-11 12:06:42,245 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-09-11 12:06:42,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:42,245 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-09-11 12:06:42,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-11 12:06:42,246 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-09-11 12:06:42,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:06:42,246 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:42,247 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:42,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:42,461 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:42,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:42,462 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-09-11 12:06:42,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:42,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693594870] [2020-09-11 12:06:42,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:42,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:42,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:42,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693594870] [2020-09-11 12:06:42,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796909580] [2020-09-11 12:06:42,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:06:42,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:06:42,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:42,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 12:06:42,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:42,640 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:42,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:42,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:42,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-11 12:06:42,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872114344] [2020-09-11 12:06:42,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 12:06:42,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:42,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 12:06:42,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-11 12:06:42,657 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-09-11 12:06:42,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:42,795 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-09-11 12:06:42,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 12:06:42,795 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-11 12:06:42,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:42,796 INFO L225 Difference]: With dead ends: 58 [2020-09-11 12:06:42,796 INFO L226 Difference]: Without dead ends: 52 [2020-09-11 12:06:42,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:06:42,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-11 12:06:42,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-09-11 12:06:42,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-11 12:06:42,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-11 12:06:42,810 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-09-11 12:06:42,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:42,810 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-11 12:06:42,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 12:06:42,810 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-11 12:06:42,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:06:42,814 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:42,815 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:43,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:43,029 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:43,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:43,030 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-09-11 12:06:43,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:43,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017869596] [2020-09-11 12:06:43,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:43,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:43,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:43,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017869596] [2020-09-11 12:06:43,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449275437] [2020-09-11 12:06:43,150 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:06:43,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:43,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 12:06:43,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:43,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:43,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:43,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-11 12:06:43,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262928887] [2020-09-11 12:06:43,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-11 12:06:43,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:43,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-11 12:06:43,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-11 12:06:43,237 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-09-11 12:06:43,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:43,368 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-11 12:06:43,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:06:43,368 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-11 12:06:43,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:43,370 INFO L225 Difference]: With dead ends: 78 [2020-09-11 12:06:43,370 INFO L226 Difference]: Without dead ends: 72 [2020-09-11 12:06:43,371 INFO L675 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 [2020-09-11 12:06:43,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-11 12:06:43,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-09-11 12:06:43,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 12:06:43,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-09-11 12:06:43,377 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-09-11 12:06:43,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:43,378 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-09-11 12:06:43,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-11 12:06:43,378 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-09-11 12:06:43,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:06:43,378 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:43,379 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:43,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:43,594 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:43,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:43,595 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-09-11 12:06:43,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:43,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552943474] [2020-09-11 12:06:43,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:43,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:43,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:43,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552943474] [2020-09-11 12:06:43,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996760570] [2020-09-11 12:06:43,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:06:43,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:43,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:43,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 12:06:43,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:43,801 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:43,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:43,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:43,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-11 12:06:43,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795184666] [2020-09-11 12:06:43,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 12:06:43,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:43,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 12:06:43,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-11 12:06:43,816 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-09-11 12:06:43,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:43,989 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-09-11 12:06:43,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:06:43,989 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-11 12:06:43,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:43,990 INFO L225 Difference]: With dead ends: 62 [2020-09-11 12:06:43,990 INFO L226 Difference]: Without dead ends: 54 [2020-09-11 12:06:43,991 INFO L675 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 [2020-09-11 12:06:43,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-11 12:06:43,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-09-11 12:06:43,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-11 12:06:43,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-09-11 12:06:43,994 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-09-11 12:06:43,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:43,994 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-09-11 12:06:43,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 12:06:43,994 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-09-11 12:06:43,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:06:43,995 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:43,995 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:44,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-11 12:06:44,206 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:44,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:44,206 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-09-11 12:06:44,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:44,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118868430] [2020-09-11 12:06:44,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:44,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:44,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:44,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118868430] [2020-09-11 12:06:44,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553830920] [2020-09-11 12:06:44,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:06:44,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:06:44,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:44,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:06:44,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:44,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:44,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:44,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-11 12:06:44,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030202873] [2020-09-11 12:06:44,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 12:06:44,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:44,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 12:06:44,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-11 12:06:44,393 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-09-11 12:06:44,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:44,541 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-09-11 12:06:44,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:06:44,541 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-11 12:06:44,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:44,542 INFO L225 Difference]: With dead ends: 64 [2020-09-11 12:06:44,542 INFO L226 Difference]: Without dead ends: 58 [2020-09-11 12:06:44,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:06:44,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-11 12:06:44,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-09-11 12:06:44,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-11 12:06:44,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-09-11 12:06:44,551 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-09-11 12:06:44,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:44,552 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-09-11 12:06:44,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 12:06:44,555 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-09-11 12:06:44,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:06:44,556 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:44,556 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:44,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:44,770 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:44,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:44,771 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-09-11 12:06:44,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:44,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70178881] [2020-09-11 12:06:44,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:44,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:44,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:44,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70178881] [2020-09-11 12:06:44,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857769087] [2020-09-11 12:06:44,868 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:06:44,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:06:44,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:44,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:06:44,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:44,961 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:44,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:44,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:44,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-11 12:06:44,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459403371] [2020-09-11 12:06:44,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 12:06:44,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:44,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 12:06:44,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:06:44,974 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-09-11 12:06:45,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:45,140 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-09-11 12:06:45,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:06:45,141 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-11 12:06:45,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:45,142 INFO L225 Difference]: With dead ends: 61 [2020-09-11 12:06:45,142 INFO L226 Difference]: Without dead ends: 55 [2020-09-11 12:06:45,142 INFO L675 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 [2020-09-11 12:06:45,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-11 12:06:45,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-09-11 12:06:45,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-11 12:06:45,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-11 12:06:45,147 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-09-11 12:06:45,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:45,147 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-11 12:06:45,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 12:06:45,147 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-11 12:06:45,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:06:45,148 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:45,148 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:45,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:45,360 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:45,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:45,361 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-09-11 12:06:45,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:45,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943164716] [2020-09-11 12:06:45,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:45,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:45,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:45,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943164716] [2020-09-11 12:06:45,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467098070] [2020-09-11 12:06:45,446 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:06:45,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:45,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:45,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:06:45,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:45,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:45,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:45,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-11 12:06:45,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954277085] [2020-09-11 12:06:45,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 12:06:45,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:45,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 12:06:45,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-11 12:06:45,524 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-09-11 12:06:45,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:45,686 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-11 12:06:45,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:06:45,687 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-11 12:06:45,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:45,688 INFO L225 Difference]: With dead ends: 77 [2020-09-11 12:06:45,688 INFO L226 Difference]: Without dead ends: 71 [2020-09-11 12:06:45,688 INFO L675 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 [2020-09-11 12:06:45,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-11 12:06:45,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-09-11 12:06:45,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-11 12:06:45,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-09-11 12:06:45,701 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-09-11 12:06:45,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:45,702 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-09-11 12:06:45,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 12:06:45,702 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-09-11 12:06:45,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:06:45,705 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:45,705 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:45,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-11 12:06:45,919 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:45,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:45,920 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-09-11 12:06:45,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:45,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427560394] [2020-09-11 12:06:45,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:45,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:45,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:45,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427560394] [2020-09-11 12:06:45,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042772939] [2020-09-11 12:06:45,996 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:06:46,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:06:46,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:46,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:06:46,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:46,065 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:46,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:46,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:46,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-11 12:06:46,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111651396] [2020-09-11 12:06:46,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 12:06:46,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:46,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 12:06:46,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:06:46,077 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-09-11 12:06:46,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:46,301 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-09-11 12:06:46,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:06:46,301 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-11 12:06:46,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:46,302 INFO L225 Difference]: With dead ends: 58 [2020-09-11 12:06:46,302 INFO L226 Difference]: Without dead ends: 50 [2020-09-11 12:06:46,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:06:46,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-11 12:06:46,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-09-11 12:06:46,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-11 12:06:46,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-09-11 12:06:46,306 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-09-11 12:06:46,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:46,306 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-09-11 12:06:46,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 12:06:46,307 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-09-11 12:06:46,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:06:46,307 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:46,308 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:46,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:46,517 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:46,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:46,517 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-09-11 12:06:46,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:46,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448596020] [2020-09-11 12:06:46,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:46,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:46,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:46,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448596020] [2020-09-11 12:06:46,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366130031] [2020-09-11 12:06:46,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:06:46,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:46,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:06:46,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:46,685 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:06:46,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:46,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:46,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-11 12:06:46,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858422478] [2020-09-11 12:06:46,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 12:06:46,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:46,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 12:06:46,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:06:46,702 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-09-11 12:06:46,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:46,924 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-09-11 12:06:46,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:06:46,924 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-11 12:06:46,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:46,925 INFO L225 Difference]: With dead ends: 60 [2020-09-11 12:06:46,925 INFO L226 Difference]: Without dead ends: 55 [2020-09-11 12:06:46,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:06:46,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-11 12:06:46,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-09-11 12:06:46,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 12:06:46,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-11 12:06:46,934 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-09-11 12:06:46,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:46,935 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-11 12:06:46,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 12:06:46,935 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-11 12:06:46,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:06:46,936 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:46,936 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:47,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-11 12:06:47,147 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:47,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:47,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-09-11 12:06:47,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:47,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204117831] [2020-09-11 12:06:47,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:47,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:47,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:47,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204117831] [2020-09-11 12:06:47,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309248408] [2020-09-11 12:06:47,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:06:47,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:47,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:47,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:06:47,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:47,327 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:06:47,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:47,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:47,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-11 12:06:47,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303627204] [2020-09-11 12:06:47,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 12:06:47,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:47,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 12:06:47,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-11 12:06:47,342 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-09-11 12:06:47,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:47,570 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-09-11 12:06:47,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:06:47,571 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 12:06:47,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:47,572 INFO L225 Difference]: With dead ends: 54 [2020-09-11 12:06:47,572 INFO L226 Difference]: Without dead ends: 49 [2020-09-11 12:06:47,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:06:47,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-11 12:06:47,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-09-11 12:06:47,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-11 12:06:47,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-09-11 12:06:47,576 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-09-11 12:06:47,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:47,576 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-09-11 12:06:47,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 12:06:47,576 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-09-11 12:06:47,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:06:47,577 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:47,577 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:47,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-11 12:06:47,789 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:47,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:47,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-09-11 12:06:47,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:47,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925931245] [2020-09-11 12:06:47,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:47,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:47,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:47,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925931245] [2020-09-11 12:06:47,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180599469] [2020-09-11 12:06:47,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:06:47,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:06:47,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:47,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:06:47,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:47,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:47,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:47,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-11 12:06:47,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956732296] [2020-09-11 12:06:47,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 12:06:47,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:47,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 12:06:47,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:06:47,970 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-09-11 12:06:48,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:48,121 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-09-11 12:06:48,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:06:48,122 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-11 12:06:48,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:48,122 INFO L225 Difference]: With dead ends: 60 [2020-09-11 12:06:48,123 INFO L226 Difference]: Without dead ends: 54 [2020-09-11 12:06:48,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:06:48,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-11 12:06:48,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-09-11 12:06:48,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 12:06:48,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-09-11 12:06:48,126 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-09-11 12:06:48,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:48,127 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-09-11 12:06:48,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 12:06:48,127 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-09-11 12:06:48,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:06:48,127 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:48,128 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:48,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-11 12:06:48,336 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:48,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:48,337 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-09-11 12:06:48,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:48,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586469106] [2020-09-11 12:06:48,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:48,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:48,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:48,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586469106] [2020-09-11 12:06:48,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482743617] [2020-09-11 12:06:48,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:06:48,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:06:48,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:48,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:06:48,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:48,539 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:48,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:48,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:48,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-11 12:06:48,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127397275] [2020-09-11 12:06:48,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 12:06:48,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:48,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 12:06:48,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-11 12:06:48,565 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-09-11 12:06:48,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:48,729 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-09-11 12:06:48,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:06:48,730 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 12:06:48,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:48,731 INFO L225 Difference]: With dead ends: 66 [2020-09-11 12:06:48,731 INFO L226 Difference]: Without dead ends: 60 [2020-09-11 12:06:48,732 INFO L675 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 [2020-09-11 12:06:48,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-11 12:06:48,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-09-11 12:06:48,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-11 12:06:48,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-11 12:06:48,735 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-09-11 12:06:48,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:48,736 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-11 12:06:48,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 12:06:48,736 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-11 12:06:48,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:06:48,736 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:48,736 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:48,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-11 12:06:48,945 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:48,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:48,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-09-11 12:06:48,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:48,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870858938] [2020-09-11 12:06:48,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:48,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:49,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:49,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870858938] [2020-09-11 12:06:49,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624786047] [2020-09-11 12:06:49,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:06:49,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:06:49,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:49,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:06:49,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:49,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:49,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:49,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-11 12:06:49,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259562759] [2020-09-11 12:06:49,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 12:06:49,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:49,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 12:06:49,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:06:49,107 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-09-11 12:06:49,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:49,287 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-09-11 12:06:49,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 12:06:49,288 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-11 12:06:49,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:49,289 INFO L225 Difference]: With dead ends: 67 [2020-09-11 12:06:49,289 INFO L226 Difference]: Without dead ends: 61 [2020-09-11 12:06:49,290 INFO L675 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 [2020-09-11 12:06:49,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-11 12:06:49,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-09-11 12:06:49,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-11 12:06:49,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-09-11 12:06:49,293 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-09-11 12:06:49,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:49,294 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-09-11 12:06:49,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 12:06:49,295 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-09-11 12:06:49,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:06:49,296 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:49,296 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:49,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:49,497 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:49,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:49,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-09-11 12:06:49,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:49,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066943160] [2020-09-11 12:06:49,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:49,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:49,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:49,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066943160] [2020-09-11 12:06:49,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099810887] [2020-09-11 12:06:49,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:06:49,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:06:49,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:49,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:06:49,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:49,674 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:49,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:49,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:49,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-11 12:06:49,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060229885] [2020-09-11 12:06:49,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 12:06:49,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:49,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 12:06:49,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-11 12:06:49,689 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-09-11 12:06:49,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:49,931 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-09-11 12:06:49,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:06:49,932 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 12:06:49,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:49,933 INFO L225 Difference]: With dead ends: 69 [2020-09-11 12:06:49,933 INFO L226 Difference]: Without dead ends: 63 [2020-09-11 12:06:49,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:06:49,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-11 12:06:49,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-09-11 12:06:49,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 12:06:49,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-11 12:06:49,936 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-09-11 12:06:49,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:49,936 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-11 12:06:49,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 12:06:49,936 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-11 12:06:49,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:06:49,937 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:49,937 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:50,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:50,147 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:50,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:50,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-09-11 12:06:50,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:50,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889446379] [2020-09-11 12:06:50,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:50,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:50,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:50,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889446379] [2020-09-11 12:06:50,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487352519] [2020-09-11 12:06:50,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:06:50,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:50,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:06:50,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:50,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:50,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:50,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-11 12:06:50,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55270977] [2020-09-11 12:06:50,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 12:06:50,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:50,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 12:06:50,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:06:50,349 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-09-11 12:06:50,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:50,613 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-11 12:06:50,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:06:50,613 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-11 12:06:50,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:50,614 INFO L225 Difference]: With dead ends: 88 [2020-09-11 12:06:50,615 INFO L226 Difference]: Without dead ends: 82 [2020-09-11 12:06:50,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:06:50,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-11 12:06:50,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-09-11 12:06:50,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-11 12:06:50,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-09-11 12:06:50,619 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-09-11 12:06:50,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:50,619 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-09-11 12:06:50,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 12:06:50,619 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-09-11 12:06:50,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:06:50,620 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:50,620 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:50,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:50,829 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:50,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:50,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-09-11 12:06:50,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:50,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368483410] [2020-09-11 12:06:50,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:50,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:50,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:50,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368483410] [2020-09-11 12:06:50,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581484863] [2020-09-11 12:06:50,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:06:50,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:50,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:50,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:06:50,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:50,984 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:50,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:50,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:50,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-11 12:06:50,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782959706] [2020-09-11 12:06:50,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 12:06:50,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:50,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 12:06:50,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-11 12:06:50,995 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-09-11 12:06:51,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:51,288 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-09-11 12:06:51,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:06:51,289 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 12:06:51,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:51,290 INFO L225 Difference]: With dead ends: 69 [2020-09-11 12:06:51,291 INFO L226 Difference]: Without dead ends: 61 [2020-09-11 12:06:51,291 INFO L675 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 [2020-09-11 12:06:51,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-11 12:06:51,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-09-11 12:06:51,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-11 12:06:51,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-09-11 12:06:51,294 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-09-11 12:06:51,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:51,294 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-09-11 12:06:51,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 12:06:51,294 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-09-11 12:06:51,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:51,295 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:51,295 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:51,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-09-11 12:06:51,496 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:51,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:51,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-09-11 12:06:51,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:51,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025408355] [2020-09-11 12:06:51,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:51,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:51,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:51,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025408355] [2020-09-11 12:06:51,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046390098] [2020-09-11 12:06:51,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:06:51,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:06:51,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:51,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:06:51,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:51,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:51,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:51,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-11 12:06:51,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817461694] [2020-09-11 12:06:51,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 12:06:51,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:51,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 12:06:51,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-11 12:06:51,693 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-09-11 12:06:51,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:51,880 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-09-11 12:06:51,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:06:51,880 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-11 12:06:51,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:51,881 INFO L225 Difference]: With dead ends: 74 [2020-09-11 12:06:51,881 INFO L226 Difference]: Without dead ends: 68 [2020-09-11 12:06:51,881 INFO L675 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 [2020-09-11 12:06:51,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-11 12:06:51,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-09-11 12:06:51,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-11 12:06:51,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-11 12:06:51,885 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-11 12:06:51,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:51,887 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-11 12:06:51,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 12:06:51,888 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-11 12:06:51,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:51,888 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:51,888 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:52,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-11 12:06:52,089 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:52,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:52,090 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-09-11 12:06:52,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:52,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713159473] [2020-09-11 12:06:52,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:52,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:52,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:52,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713159473] [2020-09-11 12:06:52,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325752309] [2020-09-11 12:06:52,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:06:52,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:06:52,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:52,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:06:52,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:52,280 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:52,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:52,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-11 12:06:52,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772160031] [2020-09-11 12:06:52,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:06:52,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:52,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:06:52,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:06:52,294 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-11 12:06:52,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:52,540 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-09-11 12:06:52,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:06:52,540 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 12:06:52,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:52,541 INFO L225 Difference]: With dead ends: 71 [2020-09-11 12:06:52,542 INFO L226 Difference]: Without dead ends: 65 [2020-09-11 12:06:52,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:06:52,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-11 12:06:52,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-09-11 12:06:52,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 12:06:52,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-11 12:06:52,545 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-11 12:06:52,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:52,546 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-11 12:06:52,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:06:52,546 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-11 12:06:52,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:52,546 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:52,546 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:52,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-11 12:06:52,756 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:52,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:52,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-09-11 12:06:52,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:52,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065118244] [2020-09-11 12:06:52,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:52,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:52,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:52,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065118244] [2020-09-11 12:06:52,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587201284] [2020-09-11 12:06:52,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:06:52,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:06:52,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:52,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:06:52,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:52,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:52,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:52,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-11 12:06:52,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618617007] [2020-09-11 12:06:52,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 12:06:52,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:52,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 12:06:52,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-11 12:06:52,948 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-11 12:06:53,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:53,178 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-09-11 12:06:53,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 12:06:53,179 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-11 12:06:53,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:53,180 INFO L225 Difference]: With dead ends: 68 [2020-09-11 12:06:53,180 INFO L226 Difference]: Without dead ends: 62 [2020-09-11 12:06:53,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:06:53,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-11 12:06:53,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-09-11 12:06:53,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-11 12:06:53,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-11 12:06:53,183 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-11 12:06:53,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:53,184 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-11 12:06:53,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 12:06:53,184 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-11 12:06:53,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:53,184 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:53,184 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:53,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-09-11 12:06:53,392 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:53,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:53,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-09-11 12:06:53,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:53,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898078293] [2020-09-11 12:06:53,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:53,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:53,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898078293] [2020-09-11 12:06:53,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121413143] [2020-09-11 12:06:53,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:06:53,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:06:53,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:53,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:06:53,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:53,568 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:53,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:53,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:53,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-11 12:06:53,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422861698] [2020-09-11 12:06:53,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:06:53,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:53,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:06:53,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:06:53,582 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-11 12:06:53,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:53,901 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-09-11 12:06:53,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:06:53,901 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 12:06:53,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:53,902 INFO L225 Difference]: With dead ends: 67 [2020-09-11 12:06:53,903 INFO L226 Difference]: Without dead ends: 61 [2020-09-11 12:06:53,903 INFO L675 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 [2020-09-11 12:06:53,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-11 12:06:53,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-09-11 12:06:53,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 12:06:53,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-11 12:06:53,907 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-11 12:06:53,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:53,907 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-11 12:06:53,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:06:53,907 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-11 12:06:53,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:53,907 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:53,908 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:54,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-11 12:06:54,109 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:54,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:54,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-09-11 12:06:54,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:54,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508881806] [2020-09-11 12:06:54,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:54,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:54,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:54,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508881806] [2020-09-11 12:06:54,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864792770] [2020-09-11 12:06:54,215 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:06:54,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:54,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:06:54,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:54,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:54,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:54,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-11 12:06:54,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258785477] [2020-09-11 12:06:54,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 12:06:54,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:54,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 12:06:54,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-11 12:06:54,296 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-11 12:06:54,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:54,561 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-11 12:06:54,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:06:54,561 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-11 12:06:54,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:54,562 INFO L225 Difference]: With dead ends: 83 [2020-09-11 12:06:54,562 INFO L226 Difference]: Without dead ends: 77 [2020-09-11 12:06:54,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:06:54,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-11 12:06:54,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-09-11 12:06:54,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-11 12:06:54,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-09-11 12:06:54,566 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-09-11 12:06:54,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:54,566 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-09-11 12:06:54,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 12:06:54,567 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-09-11 12:06:54,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:54,567 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:54,567 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:54,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:54,777 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:54,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:54,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-09-11 12:06:54,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:54,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977742572] [2020-09-11 12:06:54,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:54,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:54,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:54,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977742572] [2020-09-11 12:06:54,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572465156] [2020-09-11 12:06:54,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:06:54,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:54,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:54,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:54,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:54,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:54,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:54,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-11 12:06:54,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003654204] [2020-09-11 12:06:54,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:06:54,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:54,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:06:54,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:06:54,958 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-09-11 12:06:55,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:55,298 INFO L93 Difference]: Finished difference Result 62 states and 149 transitions. [2020-09-11 12:06:55,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:06:55,298 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 12:06:55,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:55,299 INFO L225 Difference]: With dead ends: 62 [2020-09-11 12:06:55,299 INFO L226 Difference]: Without dead ends: 54 [2020-09-11 12:06:55,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:06:55,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-11 12:06:55,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-09-11 12:06:55,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-11 12:06:55,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-09-11 12:06:55,302 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-09-11 12:06:55,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:55,303 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-09-11 12:06:55,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:06:55,303 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-09-11 12:06:55,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:55,303 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:55,303 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:55,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-11 12:06:55,512 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:55,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:55,513 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-09-11 12:06:55,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:55,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487185665] [2020-09-11 12:06:55,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:55,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:55,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:55,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487185665] [2020-09-11 12:06:55,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407406131] [2020-09-11 12:06:55,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:06:55,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:06:55,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:55,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:06:55,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:55,668 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:06:55,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:55,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:55,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-11 12:06:55,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902250855] [2020-09-11 12:06:55,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:06:55,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:55,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:06:55,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:06:55,684 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-09-11 12:06:56,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:56,005 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-09-11 12:06:56,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:06:56,006 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 12:06:56,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:56,007 INFO L225 Difference]: With dead ends: 68 [2020-09-11 12:06:56,007 INFO L226 Difference]: Without dead ends: 63 [2020-09-11 12:06:56,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:06:56,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-11 12:06:56,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-09-11 12:06:56,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-11 12:06:56,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-11 12:06:56,011 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-09-11 12:06:56,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:56,012 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-11 12:06:56,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:06:56,012 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-11 12:06:56,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 12:06:56,012 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:56,013 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:56,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-11 12:06:56,222 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:56,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:56,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-09-11 12:06:56,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:56,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101919766] [2020-09-11 12:06:56,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:56,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:56,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:56,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101919766] [2020-09-11 12:06:56,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353431385] [2020-09-11 12:06:56,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:06:56,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:06:56,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:56,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:56,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:56,412 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:06:56,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:56,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:56,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 12:06:56,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39098222] [2020-09-11 12:06:56,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:06:56,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:56,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:06:56,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:06:56,427 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-09-11 12:06:56,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:56,728 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-09-11 12:06:56,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:06:56,732 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 12:06:56,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:56,733 INFO L225 Difference]: With dead ends: 60 [2020-09-11 12:06:56,733 INFO L226 Difference]: Without dead ends: 55 [2020-09-11 12:06:56,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:06:56,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-11 12:06:56,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-09-11 12:06:56,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 12:06:56,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-09-11 12:06:56,736 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-09-11 12:06:56,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:56,736 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-09-11 12:06:56,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:06:56,737 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-09-11 12:06:56,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 12:06:56,737 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:56,737 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:56,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:56,946 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:56,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:56,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-09-11 12:06:56,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:56,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997173560] [2020-09-11 12:06:56,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:56,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:57,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:57,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997173560] [2020-09-11 12:06:57,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745278255] [2020-09-11 12:06:57,057 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:06:57,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-11 12:06:57,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:57,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:57,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:57,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:57,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:57,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 12:06:57,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084690875] [2020-09-11 12:06:57,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:06:57,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:57,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:06:57,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:06:57,117 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-09-11 12:06:57,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:57,260 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-09-11 12:06:57,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:06:57,260 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-11 12:06:57,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:57,261 INFO L225 Difference]: With dead ends: 66 [2020-09-11 12:06:57,261 INFO L226 Difference]: Without dead ends: 60 [2020-09-11 12:06:57,262 INFO L675 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 [2020-09-11 12:06:57,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-11 12:06:57,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-09-11 12:06:57,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 12:06:57,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-09-11 12:06:57,265 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-09-11 12:06:57,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:57,265 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-09-11 12:06:57,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:06:57,265 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-09-11 12:06:57,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 12:06:57,266 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:57,266 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:57,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:57,474 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:57,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:57,475 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-09-11 12:06:57,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:57,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813280539] [2020-09-11 12:06:57,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:57,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:57,584 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:57,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813280539] [2020-09-11 12:06:57,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936118492] [2020-09-11 12:06:57,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:06:57,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 12:06:57,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:57,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:57,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:57,658 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:57,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:57,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:57,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 12:06:57,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15887362] [2020-09-11 12:06:57,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:06:57,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:57,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:06:57,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:06:57,672 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-09-11 12:06:57,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:57,928 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-09-11 12:06:57,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:06:57,928 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 12:06:57,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:57,929 INFO L225 Difference]: With dead ends: 74 [2020-09-11 12:06:57,929 INFO L226 Difference]: Without dead ends: 68 [2020-09-11 12:06:57,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:06:57,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-11 12:06:57,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-09-11 12:06:57,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-11 12:06:57,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-09-11 12:06:57,932 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-09-11 12:06:57,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:57,932 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-09-11 12:06:57,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:06:57,933 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-09-11 12:06:57,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 12:06:57,933 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:57,933 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:58,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-11 12:06:58,134 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:58,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:58,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-09-11 12:06:58,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:58,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713252071] [2020-09-11 12:06:58,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:58,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:58,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:58,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713252071] [2020-09-11 12:06:58,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89743051] [2020-09-11 12:06:58,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:06:58,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:58,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:58,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:58,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:58,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 12:06:58,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25151738] [2020-09-11 12:06:58,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:06:58,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:58,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:06:58,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:06:58,308 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-09-11 12:06:58,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:58,520 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-09-11 12:06:58,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:06:58,521 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-11 12:06:58,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:58,521 INFO L225 Difference]: With dead ends: 75 [2020-09-11 12:06:58,521 INFO L226 Difference]: Without dead ends: 69 [2020-09-11 12:06:58,522 INFO L675 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 [2020-09-11 12:06:58,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-11 12:06:58,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-09-11 12:06:58,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-11 12:06:58,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-11 12:06:58,527 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-09-11 12:06:58,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:58,527 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-11 12:06:58,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:06:58,527 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-11 12:06:58,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 12:06:58,530 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:58,530 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:58,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:58,738 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:58,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:58,739 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-09-11 12:06:58,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:58,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503842058] [2020-09-11 12:06:58,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:58,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:58,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:58,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503842058] [2020-09-11 12:06:58,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23820540] [2020-09-11 12:06:58,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:06:58,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:58,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:58,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:58,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:58,992 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:59,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:59,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:59,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 12:06:59,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078265251] [2020-09-11 12:06:59,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:06:59,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:59,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:06:59,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:06:59,012 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-09-11 12:06:59,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:59,344 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-09-11 12:06:59,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:06:59,345 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 12:06:59,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:59,346 INFO L225 Difference]: With dead ends: 79 [2020-09-11 12:06:59,346 INFO L226 Difference]: Without dead ends: 73 [2020-09-11 12:06:59,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:06:59,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-11 12:06:59,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-09-11 12:06:59,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 12:06:59,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-11 12:06:59,351 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-09-11 12:06:59,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:59,352 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-11 12:06:59,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:06:59,352 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-11 12:06:59,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 12:06:59,353 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:59,353 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:59,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-11 12:06:59,566 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:59,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:59,567 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-09-11 12:06:59,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:59,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193221481] [2020-09-11 12:06:59,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:59,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:59,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:59,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193221481] [2020-09-11 12:06:59,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220019560] [2020-09-11 12:06:59,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:06:59,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 12:06:59,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:59,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:59,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:59,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:59,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:59,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 12:06:59,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124952696] [2020-09-11 12:06:59,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:06:59,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:59,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:06:59,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:06:59,754 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-09-11 12:07:00,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:00,076 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-09-11 12:07:00,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 12:07:00,077 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-11 12:07:00,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:00,078 INFO L225 Difference]: With dead ends: 79 [2020-09-11 12:07:00,078 INFO L226 Difference]: Without dead ends: 73 [2020-09-11 12:07:00,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:07:00,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-11 12:07:00,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-09-11 12:07:00,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-11 12:07:00,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-09-11 12:07:00,081 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-09-11 12:07:00,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:00,081 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-09-11 12:07:00,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:07:00,082 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-09-11 12:07:00,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 12:07:00,082 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:00,082 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:00,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:00,292 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:00,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:00,293 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-09-11 12:07:00,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:00,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35116252] [2020-09-11 12:07:00,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:00,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:00,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35116252] [2020-09-11 12:07:00,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009715592] [2020-09-11 12:07:00,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:00,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:07:00,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:00,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:07:00,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:00,481 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:00,491 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:00,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:00,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 12:07:00,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122805724] [2020-09-11 12:07:00,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:07:00,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:00,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:07:00,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:07:00,493 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-09-11 12:07:00,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:00,892 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-09-11 12:07:00,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:07:00,892 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 12:07:00,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:00,893 INFO L225 Difference]: With dead ends: 76 [2020-09-11 12:07:00,893 INFO L226 Difference]: Without dead ends: 70 [2020-09-11 12:07:00,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:07:00,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-11 12:07:00,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-09-11 12:07:00,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-11 12:07:00,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-11 12:07:00,897 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-09-11 12:07:00,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:00,897 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-11 12:07:00,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:07:00,898 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-11 12:07:00,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 12:07:00,898 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:00,898 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:01,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-11 12:07:01,099 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:01,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:01,100 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-09-11 12:07:01,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:01,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477978694] [2020-09-11 12:07:01,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:01,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:01,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:01,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477978694] [2020-09-11 12:07:01,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661350910] [2020-09-11 12:07:01,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:01,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-11 12:07:01,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:01,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:07:01,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:01,268 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:01,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:01,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 12:07:01,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563644029] [2020-09-11 12:07:01,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:07:01,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:01,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:07:01,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:07:01,270 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-09-11 12:07:01,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:01,611 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-09-11 12:07:01,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:07:01,611 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-11 12:07:01,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:01,612 INFO L225 Difference]: With dead ends: 96 [2020-09-11 12:07:01,613 INFO L226 Difference]: Without dead ends: 90 [2020-09-11 12:07:01,613 INFO L675 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 [2020-09-11 12:07:01,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-11 12:07:01,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-09-11 12:07:01,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 12:07:01,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-09-11 12:07:01,617 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-09-11 12:07:01,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:01,617 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-09-11 12:07:01,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:07:01,618 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-09-11 12:07:01,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 12:07:01,618 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:01,618 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:01,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-11 12:07:01,829 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:01,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:01,830 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-09-11 12:07:01,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:01,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580216306] [2020-09-11 12:07:01,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:01,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:01,935 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:01,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580216306] [2020-09-11 12:07:01,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086575162] [2020-09-11 12:07:01,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:01,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 12:07:01,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:01,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:07:01,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:02,039 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:02,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:02,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:02,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 12:07:02,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130616514] [2020-09-11 12:07:02,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:07:02,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:02,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:07:02,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:07:02,056 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-09-11 12:07:02,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:02,550 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-09-11 12:07:02,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:07:02,551 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 12:07:02,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:02,552 INFO L225 Difference]: With dead ends: 77 [2020-09-11 12:07:02,553 INFO L226 Difference]: Without dead ends: 69 [2020-09-11 12:07:02,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-09-11 12:07:02,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-11 12:07:02,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-09-11 12:07:02,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-11 12:07:02,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-09-11 12:07:02,557 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-09-11 12:07:02,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:02,557 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-09-11 12:07:02,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:07:02,557 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-09-11 12:07:02,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 12:07:02,558 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:02,558 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:02,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-09-11 12:07:02,768 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:02,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:02,769 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-09-11 12:07:02,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:02,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964580729] [2020-09-11 12:07:02,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:02,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:02,928 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:02,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964580729] [2020-09-11 12:07:02,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865493959] [2020-09-11 12:07:02,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:03,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:03,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 12:07:03,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:03,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:03,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 12:07:03,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104047398] [2020-09-11 12:07:03,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:07:03,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:03,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:07:03,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:07:03,038 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-09-11 12:07:03,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:03,271 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-11 12:07:03,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 12:07:03,272 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-11 12:07:03,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:03,273 INFO L225 Difference]: With dead ends: 84 [2020-09-11 12:07:03,273 INFO L226 Difference]: Without dead ends: 78 [2020-09-11 12:07:03,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:07:03,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-11 12:07:03,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-09-11 12:07:03,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 12:07:03,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-11 12:07:03,276 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-11 12:07:03,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:03,276 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-11 12:07:03,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:07:03,277 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-11 12:07:03,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 12:07:03,277 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:03,277 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:03,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-11 12:07:03,487 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:03,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:03,488 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-09-11 12:07:03,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:03,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188461028] [2020-09-11 12:07:03,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:03,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:03,625 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:03,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188461028] [2020-09-11 12:07:03,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855538437] [2020-09-11 12:07:03,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:03,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:07:03,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:03,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 12:07:03,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:03,704 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:03,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:03,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:03,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 12:07:03,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006434489] [2020-09-11 12:07:03,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:07:03,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:03,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:07:03,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:07:03,719 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-11 12:07:04,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:04,039 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-09-11 12:07:04,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:07:04,039 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 12:07:04,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:04,040 INFO L225 Difference]: With dead ends: 81 [2020-09-11 12:07:04,040 INFO L226 Difference]: Without dead ends: 75 [2020-09-11 12:07:04,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:07:04,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-11 12:07:04,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-09-11 12:07:04,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 12:07:04,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-11 12:07:04,043 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-11 12:07:04,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:04,044 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-11 12:07:04,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:07:04,044 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-11 12:07:04,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 12:07:04,044 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:04,044 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:04,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-11 12:07:04,252 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:04,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:04,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-09-11 12:07:04,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:04,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082784354] [2020-09-11 12:07:04,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:04,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:04,393 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:04,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082784354] [2020-09-11 12:07:04,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425908616] [2020-09-11 12:07:04,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:04,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 12:07:04,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:04,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 12:07:04,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:04,491 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:04,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:04,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 12:07:04,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221509057] [2020-09-11 12:07:04,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:07:04,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:04,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:07:04,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:07:04,494 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-11 12:07:04,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:04,779 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-11 12:07:04,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:07:04,780 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-11 12:07:04,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:04,781 INFO L225 Difference]: With dead ends: 78 [2020-09-11 12:07:04,781 INFO L226 Difference]: Without dead ends: 72 [2020-09-11 12:07:04,781 INFO L675 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 [2020-09-11 12:07:04,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-11 12:07:04,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-09-11 12:07:04,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 12:07:04,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-11 12:07:04,784 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-11 12:07:04,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:04,784 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-11 12:07:04,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:07:04,784 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-11 12:07:04,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 12:07:04,785 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:04,785 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:04,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-09-11 12:07:04,994 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:04,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:04,995 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-09-11 12:07:04,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:04,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262293881] [2020-09-11 12:07:04,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:05,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:05,150 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:05,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262293881] [2020-09-11 12:07:05,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993241335] [2020-09-11 12:07:05,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:05,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:07:05,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:05,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 12:07:05,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:05,230 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:05,241 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:05,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:05,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 12:07:05,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958343788] [2020-09-11 12:07:05,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:07:05,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:05,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:07:05,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:07:05,243 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-11 12:07:05,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:05,589 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-11 12:07:05,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:07:05,589 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 12:07:05,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:05,590 INFO L225 Difference]: With dead ends: 77 [2020-09-11 12:07:05,590 INFO L226 Difference]: Without dead ends: 71 [2020-09-11 12:07:05,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-09-11 12:07:05,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-11 12:07:05,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-09-11 12:07:05,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 12:07:05,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-11 12:07:05,593 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-11 12:07:05,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:05,594 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-11 12:07:05,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:07:05,594 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-11 12:07:05,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 12:07:05,595 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:05,595 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:05,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-09-11 12:07:05,803 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:05,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:05,804 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-09-11 12:07:05,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:05,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837016456] [2020-09-11 12:07:05,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:05,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:05,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:05,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837016456] [2020-09-11 12:07:05,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478966950] [2020-09-11 12:07:05,912 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:05,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-11 12:07:05,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:05,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 12:07:05,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:05,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:05,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:05,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 12:07:05,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222390038] [2020-09-11 12:07:05,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:07:05,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:05,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:07:05,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:07:05,996 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-11 12:07:06,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:06,331 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-09-11 12:07:06,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 12:07:06,332 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-11 12:07:06,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:06,332 INFO L225 Difference]: With dead ends: 74 [2020-09-11 12:07:06,333 INFO L226 Difference]: Without dead ends: 68 [2020-09-11 12:07:06,333 INFO L675 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 [2020-09-11 12:07:06,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-11 12:07:06,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-09-11 12:07:06,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 12:07:06,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-11 12:07:06,337 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-11 12:07:06,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:06,337 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-11 12:07:06,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:07:06,337 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-11 12:07:06,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 12:07:06,338 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:06,338 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:06,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:06,547 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:06,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:06,548 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-09-11 12:07:06,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:06,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112784162] [2020-09-11 12:07:06,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:06,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:06,649 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:06,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112784162] [2020-09-11 12:07:06,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470282083] [2020-09-11 12:07:06,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:06,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 12:07:06,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:06,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 12:07:06,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:06,745 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:06,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:06,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:06,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 12:07:06,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856745362] [2020-09-11 12:07:06,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:07:06,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:06,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:07:06,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:07:06,766 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-11 12:07:07,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:07,190 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-09-11 12:07:07,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:07:07,197 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 12:07:07,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:07,198 INFO L225 Difference]: With dead ends: 73 [2020-09-11 12:07:07,198 INFO L226 Difference]: Without dead ends: 67 [2020-09-11 12:07:07,199 INFO L675 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 [2020-09-11 12:07:07,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-11 12:07:07,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-09-11 12:07:07,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 12:07:07,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-11 12:07:07,202 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-11 12:07:07,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:07,203 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-11 12:07:07,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:07:07,203 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-11 12:07:07,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 12:07:07,203 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:07,204 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:07,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-11 12:07:07,414 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:07,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:07,415 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-09-11 12:07:07,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:07,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889477054] [2020-09-11 12:07:07,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:07,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:07,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:07,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889477054] [2020-09-11 12:07:07,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318774594] [2020-09-11 12:07:07,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:07,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:07,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 12:07:07,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:07,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:07,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:07,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 12:07:07,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013431079] [2020-09-11 12:07:07,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:07:07,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:07,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:07:07,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:07:07,590 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-11 12:07:07,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:07,967 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-11 12:07:07,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:07:07,968 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-11 12:07:07,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:07,969 INFO L225 Difference]: With dead ends: 89 [2020-09-11 12:07:07,969 INFO L226 Difference]: Without dead ends: 83 [2020-09-11 12:07:07,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-09-11 12:07:07,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-11 12:07:07,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-09-11 12:07:07,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-11 12:07:07,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-09-11 12:07:07,973 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-09-11 12:07:07,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:07,973 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-09-11 12:07:07,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:07:07,973 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-09-11 12:07:07,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 12:07:07,974 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:07,974 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:08,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:08,183 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:08,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:08,184 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-09-11 12:07:08,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:08,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866736705] [2020-09-11 12:07:08,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:08,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:08,283 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:08,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866736705] [2020-09-11 12:07:08,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846746807] [2020-09-11 12:07:08,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:08,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:07:08,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:08,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 12:07:08,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:08,359 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:08,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:08,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:08,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 12:07:08,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270651351] [2020-09-11 12:07:08,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:07:08,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:08,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:07:08,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:07:08,372 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-09-11 12:07:08,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:08,884 INFO L93 Difference]: Finished difference Result 70 states and 169 transitions. [2020-09-11 12:07:08,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:07:08,885 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 12:07:08,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:08,886 INFO L225 Difference]: With dead ends: 70 [2020-09-11 12:07:08,886 INFO L226 Difference]: Without dead ends: 62 [2020-09-11 12:07:08,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-09-11 12:07:08,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-11 12:07:08,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-09-11 12:07:08,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-11 12:07:08,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-09-11 12:07:08,889 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-09-11 12:07:08,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:08,890 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-09-11 12:07:08,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:07:08,890 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-09-11 12:07:08,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 12:07:08,890 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:08,890 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:09,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-09-11 12:07:09,099 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:09,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:09,100 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-09-11 12:07:09,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:09,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648535836] [2020-09-11 12:07:09,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:09,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:09,202 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:09,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648535836] [2020-09-11 12:07:09,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218788336] [2020-09-11 12:07:09,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:09,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 12:07:09,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:09,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 12:07:09,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:09,279 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:07:09,297 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:09,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:09,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 12:07:09,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250503981] [2020-09-11 12:07:09,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:07:09,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:09,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:07:09,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:07:09,299 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-09-11 12:07:09,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:09,833 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-09-11 12:07:09,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:07:09,834 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 12:07:09,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:09,835 INFO L225 Difference]: With dead ends: 76 [2020-09-11 12:07:09,836 INFO L226 Difference]: Without dead ends: 71 [2020-09-11 12:07:09,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-09-11 12:07:09,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-11 12:07:09,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-09-11 12:07:09,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 12:07:09,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-11 12:07:09,840 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-09-11 12:07:09,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:09,841 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-11 12:07:09,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:07:09,841 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-11 12:07:09,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:09,842 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:09,842 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:10,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:10,043 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:10,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:10,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-09-11 12:07:10,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:10,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776397059] [2020-09-11 12:07:10,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:10,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:10,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:10,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776397059] [2020-09-11 12:07:10,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872112824] [2020-09-11 12:07:10,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:10,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:07:10,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:10,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:10,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:10,302 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:07:10,318 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:10,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:10,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 12:07:10,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207633090] [2020-09-11 12:07:10,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:10,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:10,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:10,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:10,321 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-09-11 12:07:10,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:10,897 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-09-11 12:07:10,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:07:10,898 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 12:07:10,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:10,898 INFO L225 Difference]: With dead ends: 66 [2020-09-11 12:07:10,899 INFO L226 Difference]: Without dead ends: 61 [2020-09-11 12:07:10,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-09-11 12:07:10,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-11 12:07:10,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-09-11 12:07:10,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 12:07:10,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-11 12:07:10,902 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-09-11 12:07:10,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:10,903 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-11 12:07:10,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:10,903 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-11 12:07:10,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:10,904 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:10,904 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:11,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-09-11 12:07:11,113 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:11,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:11,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-09-11 12:07:11,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:11,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614917070] [2020-09-11 12:07:11,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:11,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:11,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:11,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614917070] [2020-09-11 12:07:11,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561879635] [2020-09-11 12:07:11,268 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:11,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-11 12:07:11,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:11,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:11,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:11,340 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:11,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:11,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 12:07:11,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160791944] [2020-09-11 12:07:11,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:07:11,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:11,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:07:11,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:07:11,341 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-09-11 12:07:11,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:11,544 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-09-11 12:07:11,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 12:07:11,545 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 12:07:11,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:11,545 INFO L225 Difference]: With dead ends: 72 [2020-09-11 12:07:11,546 INFO L226 Difference]: Without dead ends: 66 [2020-09-11 12:07:11,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:07:11,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-11 12:07:11,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-09-11 12:07:11,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-11 12:07:11,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-09-11 12:07:11,550 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-09-11 12:07:11,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:11,551 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-09-11 12:07:11,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:07:11,551 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-09-11 12:07:11,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:11,551 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:11,551 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:11,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-11 12:07:11,759 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:11,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:11,760 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-09-11 12:07:11,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:11,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341743991] [2020-09-11 12:07:11,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:11,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:11,962 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:11,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341743991] [2020-09-11 12:07:11,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140435044] [2020-09-11 12:07:11,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:12,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-11 12:07:12,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:12,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:12,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:12,058 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:12,073 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:12,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:12,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 12:07:12,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280868042] [2020-09-11 12:07:12,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:12,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:12,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:12,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:12,076 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-09-11 12:07:12,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:12,418 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-09-11 12:07:12,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:07:12,419 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 12:07:12,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:12,420 INFO L225 Difference]: With dead ends: 82 [2020-09-11 12:07:12,420 INFO L226 Difference]: Without dead ends: 76 [2020-09-11 12:07:12,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:07:12,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-11 12:07:12,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-09-11 12:07:12,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-11 12:07:12,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-09-11 12:07:12,425 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-09-11 12:07:12,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:12,425 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-09-11 12:07:12,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:12,425 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-09-11 12:07:12,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:12,426 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:12,426 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:12,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-09-11 12:07:12,637 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:12,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:12,638 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-09-11 12:07:12,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:12,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569362074] [2020-09-11 12:07:12,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:12,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:12,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:12,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569362074] [2020-09-11 12:07:12,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36275307] [2020-09-11 12:07:12,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:12,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:12,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:12,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:12,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:12,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:12,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 12:07:12,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368130339] [2020-09-11 12:07:12,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:07:12,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:12,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:07:12,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:07:12,899 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-09-11 12:07:13,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:13,171 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-09-11 12:07:13,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 12:07:13,171 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 12:07:13,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:13,172 INFO L225 Difference]: With dead ends: 83 [2020-09-11 12:07:13,172 INFO L226 Difference]: Without dead ends: 77 [2020-09-11 12:07:13,173 INFO L675 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 [2020-09-11 12:07:13,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-11 12:07:13,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-09-11 12:07:13,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-11 12:07:13,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-09-11 12:07:13,176 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-09-11 12:07:13,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:13,176 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-09-11 12:07:13,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:07:13,176 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-09-11 12:07:13,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:13,177 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:13,177 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:13,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-09-11 12:07:13,384 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:13,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:13,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-09-11 12:07:13,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:13,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609010783] [2020-09-11 12:07:13,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:13,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:13,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:13,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609010783] [2020-09-11 12:07:13,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791385571] [2020-09-11 12:07:13,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:13,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:07:13,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:13,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:13,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:13,594 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:13,609 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:13,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:13,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 12:07:13,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680221144] [2020-09-11 12:07:13,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:13,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:13,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:13,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:13,615 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-09-11 12:07:13,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:13,986 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-09-11 12:07:13,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:07:13,991 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 12:07:13,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:13,992 INFO L225 Difference]: With dead ends: 89 [2020-09-11 12:07:13,992 INFO L226 Difference]: Without dead ends: 83 [2020-09-11 12:07:13,993 INFO L675 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 [2020-09-11 12:07:13,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-11 12:07:13,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-09-11 12:07:13,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-11 12:07:13,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-09-11 12:07:13,995 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-09-11 12:07:13,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:13,996 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-09-11 12:07:13,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:13,996 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-09-11 12:07:13,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:13,996 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:13,996 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:14,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:14,205 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:14,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:14,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-09-11 12:07:14,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:14,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133830007] [2020-09-11 12:07:14,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:14,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:14,340 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:14,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133830007] [2020-09-11 12:07:14,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125052142] [2020-09-11 12:07:14,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:14,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-11 12:07:14,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:14,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:14,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:14,409 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:14,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:14,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 12:07:14,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608327659] [2020-09-11 12:07:14,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:07:14,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:14,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:07:14,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:07:14,411 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-09-11 12:07:14,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:14,756 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-09-11 12:07:14,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:07:14,756 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 12:07:14,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:14,757 INFO L225 Difference]: With dead ends: 89 [2020-09-11 12:07:14,757 INFO L226 Difference]: Without dead ends: 83 [2020-09-11 12:07:14,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-11 12:07:14,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-11 12:07:14,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-09-11 12:07:14,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 12:07:14,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-11 12:07:14,760 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-09-11 12:07:14,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:14,761 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-11 12:07:14,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:07:14,761 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-11 12:07:14,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:14,761 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:14,761 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:14,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:14,969 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:14,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:14,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-09-11 12:07:14,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:14,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482633613] [2020-09-11 12:07:14,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:14,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:15,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:15,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482633613] [2020-09-11 12:07:15,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070527192] [2020-09-11 12:07:15,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:15,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:07:15,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:15,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:15,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:15,177 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:15,189 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:15,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:15,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 12:07:15,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347908981] [2020-09-11 12:07:15,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:15,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:15,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:15,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:15,191 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-09-11 12:07:15,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:15,627 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-09-11 12:07:15,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:07:15,628 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 12:07:15,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:15,630 INFO L225 Difference]: With dead ends: 86 [2020-09-11 12:07:15,630 INFO L226 Difference]: Without dead ends: 80 [2020-09-11 12:07:15,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-09-11 12:07:15,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-11 12:07:15,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-09-11 12:07:15,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 12:07:15,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-11 12:07:15,633 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-09-11 12:07:15,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:15,633 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-11 12:07:15,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:15,633 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-11 12:07:15,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:15,634 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:15,634 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:15,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-09-11 12:07:15,835 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:15,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:15,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-09-11 12:07:15,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:15,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316521040] [2020-09-11 12:07:15,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:15,967 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:15,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316521040] [2020-09-11 12:07:15,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830059360] [2020-09-11 12:07:15,968 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:16,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-11 12:07:16,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:16,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:16,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:16,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:16,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:16,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 12:07:16,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357116364] [2020-09-11 12:07:16,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:07:16,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:16,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:07:16,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:07:16,029 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-09-11 12:07:16,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:16,457 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-09-11 12:07:16,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 12:07:16,458 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 12:07:16,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:16,459 INFO L225 Difference]: With dead ends: 87 [2020-09-11 12:07:16,459 INFO L226 Difference]: Without dead ends: 81 [2020-09-11 12:07:16,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-09-11 12:07:16,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-11 12:07:16,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-09-11 12:07:16,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-11 12:07:16,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-09-11 12:07:16,462 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-09-11 12:07:16,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:16,462 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-09-11 12:07:16,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:07:16,462 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-09-11 12:07:16,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:16,463 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:16,463 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:16,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:16,671 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:16,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:16,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-09-11 12:07:16,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:16,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246356906] [2020-09-11 12:07:16,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:16,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:16,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:16,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246356906] [2020-09-11 12:07:16,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939024655] [2020-09-11 12:07:16,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:16,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-11 12:07:16,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:16,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:16,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:16,893 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:16,909 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:16,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:16,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 12:07:16,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102561713] [2020-09-11 12:07:16,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:16,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:16,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:16,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:16,912 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-09-11 12:07:17,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:17,375 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-09-11 12:07:17,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:07:17,375 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 12:07:17,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:17,376 INFO L225 Difference]: With dead ends: 84 [2020-09-11 12:07:17,376 INFO L226 Difference]: Without dead ends: 78 [2020-09-11 12:07:17,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-09-11 12:07:17,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-11 12:07:17,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-09-11 12:07:17,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 12:07:17,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-11 12:07:17,380 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-09-11 12:07:17,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:17,380 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-11 12:07:17,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:17,381 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-11 12:07:17,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:17,381 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:17,381 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:17,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-11 12:07:17,590 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:17,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:17,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-09-11 12:07:17,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:17,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129772634] [2020-09-11 12:07:17,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:17,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:17,698 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:17,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129772634] [2020-09-11 12:07:17,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377569869] [2020-09-11 12:07:17,699 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:17,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:17,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:17,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:17,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:17,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:17,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 12:07:17,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369593650] [2020-09-11 12:07:17,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:07:17,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:17,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:07:17,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:07:17,785 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-09-11 12:07:18,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:18,267 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-11 12:07:18,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 12:07:18,267 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 12:07:18,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:18,269 INFO L225 Difference]: With dead ends: 104 [2020-09-11 12:07:18,269 INFO L226 Difference]: Without dead ends: 98 [2020-09-11 12:07:18,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-09-11 12:07:18,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-11 12:07:18,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-09-11 12:07:18,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 12:07:18,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-09-11 12:07:18,272 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-09-11 12:07:18,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:18,273 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-09-11 12:07:18,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:07:18,273 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-09-11 12:07:18,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:18,273 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:18,274 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:18,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-09-11 12:07:18,474 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:18,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:18,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-09-11 12:07:18,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:18,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984412136] [2020-09-11 12:07:18,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:18,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:18,588 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:18,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984412136] [2020-09-11 12:07:18,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292611530] [2020-09-11 12:07:18,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:18,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:07:18,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:18,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:18,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:18,683 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:18,694 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:18,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:18,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 12:07:18,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324965597] [2020-09-11 12:07:18,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:18,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:18,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:18,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:18,695 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-09-11 12:07:19,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:19,284 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-09-11 12:07:19,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 12:07:19,285 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 12:07:19,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:19,286 INFO L225 Difference]: With dead ends: 85 [2020-09-11 12:07:19,286 INFO L226 Difference]: Without dead ends: 77 [2020-09-11 12:07:19,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 12:07:19,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-11 12:07:19,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-09-11 12:07:19,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-11 12:07:19,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-09-11 12:07:19,289 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-09-11 12:07:19,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:19,290 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-09-11 12:07:19,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:19,290 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-09-11 12:07:19,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 12:07:19,291 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:19,291 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:19,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-09-11 12:07:19,492 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:19,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:19,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-09-11 12:07:19,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:19,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346774866] [2020-09-11 12:07:19,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:19,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:19,653 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:19,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346774866] [2020-09-11 12:07:19,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998537981] [2020-09-11 12:07:19,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:19,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-11 12:07:19,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:19,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 12:07:19,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:19,724 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:19,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:19,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 12:07:19,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56682749] [2020-09-11 12:07:19,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:19,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:19,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:19,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:19,725 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-09-11 12:07:20,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:20,007 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-09-11 12:07:20,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:07:20,008 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-11 12:07:20,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:20,010 INFO L225 Difference]: With dead ends: 94 [2020-09-11 12:07:20,010 INFO L226 Difference]: Without dead ends: 88 [2020-09-11 12:07:20,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:07:20,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-11 12:07:20,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-09-11 12:07:20,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 12:07:20,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-11 12:07:20,015 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-11 12:07:20,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:20,015 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-11 12:07:20,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:20,015 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-11 12:07:20,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 12:07:20,016 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:20,016 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:20,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-09-11 12:07:20,227 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:20,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:20,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-09-11 12:07:20,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:20,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824103929] [2020-09-11 12:07:20,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:20,417 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:20,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824103929] [2020-09-11 12:07:20,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31303954] [2020-09-11 12:07:20,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:20,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:07:20,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:20,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 12:07:20,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:20,500 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:20,515 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:20,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:20,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 12:07:20,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721573566] [2020-09-11 12:07:20,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:07:20,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:20,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:07:20,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:07:20,517 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-11 12:07:20,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:20,843 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-09-11 12:07:20,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:07:20,843 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 12:07:20,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:20,844 INFO L225 Difference]: With dead ends: 91 [2020-09-11 12:07:20,845 INFO L226 Difference]: Without dead ends: 85 [2020-09-11 12:07:20,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-11 12:07:20,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-11 12:07:20,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-09-11 12:07:20,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 12:07:20,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-11 12:07:20,848 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-11 12:07:20,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:20,848 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-11 12:07:20,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:07:20,848 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-11 12:07:20,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 12:07:20,848 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:20,848 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:21,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-09-11 12:07:21,049 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:21,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:21,050 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-09-11 12:07:21,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:21,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399246623] [2020-09-11 12:07:21,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:21,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:21,185 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:21,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399246623] [2020-09-11 12:07:21,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543685356] [2020-09-11 12:07:21,186 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:21,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-11 12:07:21,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:21,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 12:07:21,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:21,259 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:21,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:21,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 12:07:21,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79782478] [2020-09-11 12:07:21,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:21,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:21,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:21,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:21,260 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-11 12:07:21,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:21,589 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-11 12:07:21,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 12:07:21,590 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-11 12:07:21,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:21,591 INFO L225 Difference]: With dead ends: 88 [2020-09-11 12:07:21,591 INFO L226 Difference]: Without dead ends: 82 [2020-09-11 12:07:21,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-09-11 12:07:21,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-11 12:07:21,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-09-11 12:07:21,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 12:07:21,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-11 12:07:21,593 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-11 12:07:21,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:21,594 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-11 12:07:21,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:21,594 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-11 12:07:21,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 12:07:21,594 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:21,595 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:21,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:21,797 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:21,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:21,797 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-09-11 12:07:21,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:21,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103183123] [2020-09-11 12:07:21,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:21,934 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:21,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103183123] [2020-09-11 12:07:21,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045592094] [2020-09-11 12:07:21,934 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:21,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-11 12:07:21,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:21,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 12:07:21,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:22,014 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:22,032 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:22,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:22,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 12:07:22,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824773828] [2020-09-11 12:07:22,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:07:22,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:22,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:07:22,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:07:22,034 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-11 12:07:22,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:22,494 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-09-11 12:07:22,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:07:22,495 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 12:07:22,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:22,496 INFO L225 Difference]: With dead ends: 87 [2020-09-11 12:07:22,496 INFO L226 Difference]: Without dead ends: 81 [2020-09-11 12:07:22,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-09-11 12:07:22,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-11 12:07:22,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-09-11 12:07:22,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 12:07:22,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-11 12:07:22,499 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-11 12:07:22,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:22,499 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-11 12:07:22,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:07:22,500 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-11 12:07:22,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 12:07:22,500 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:22,500 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:22,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:22,703 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:22,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:22,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-09-11 12:07:22,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:22,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878564266] [2020-09-11 12:07:22,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:22,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:22,852 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:22,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878564266] [2020-09-11 12:07:22,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614039364] [2020-09-11 12:07:22,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:22,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:22,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 12:07:22,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:22,930 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:22,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:22,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 12:07:22,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079301920] [2020-09-11 12:07:22,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:22,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:22,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:22,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:22,932 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-11 12:07:23,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:23,318 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-09-11 12:07:23,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:07:23,319 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-11 12:07:23,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:23,320 INFO L225 Difference]: With dead ends: 84 [2020-09-11 12:07:23,320 INFO L226 Difference]: Without dead ends: 78 [2020-09-11 12:07:23,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-09-11 12:07:23,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-11 12:07:23,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-09-11 12:07:23,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 12:07:23,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-11 12:07:23,324 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-11 12:07:23,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:23,324 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-11 12:07:23,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:23,324 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-11 12:07:23,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 12:07:23,325 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:23,325 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:23,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-09-11 12:07:23,533 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:23,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:23,534 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-09-11 12:07:23,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:23,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647437354] [2020-09-11 12:07:23,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:23,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:23,695 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:23,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647437354] [2020-09-11 12:07:23,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524145520] [2020-09-11 12:07:23,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:23,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:07:23,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:23,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 12:07:23,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:23,781 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:23,800 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:23,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:23,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 12:07:23,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413312981] [2020-09-11 12:07:23,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:07:23,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:23,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:07:23,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:07:23,801 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-11 12:07:24,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:24,350 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-11 12:07:24,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:07:24,351 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 12:07:24,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:24,352 INFO L225 Difference]: With dead ends: 83 [2020-09-11 12:07:24,352 INFO L226 Difference]: Without dead ends: 77 [2020-09-11 12:07:24,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-09-11 12:07:24,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-11 12:07:24,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-09-11 12:07:24,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 12:07:24,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-11 12:07:24,356 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-11 12:07:24,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:24,356 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-11 12:07:24,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:07:24,356 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-11 12:07:24,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 12:07:24,357 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:24,357 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:24,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:24,559 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:24,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:24,560 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-09-11 12:07:24,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:24,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249594198] [2020-09-11 12:07:24,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:24,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:24,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249594198] [2020-09-11 12:07:24,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823269746] [2020-09-11 12:07:24,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:24,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-11 12:07:24,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:24,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 12:07:24,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:24,773 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:24,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:24,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 12:07:24,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119184441] [2020-09-11 12:07:24,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:24,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:24,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:24,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:24,775 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-11 12:07:25,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:25,236 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-09-11 12:07:25,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 12:07:25,237 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-11 12:07:25,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:25,238 INFO L225 Difference]: With dead ends: 80 [2020-09-11 12:07:25,238 INFO L226 Difference]: Without dead ends: 74 [2020-09-11 12:07:25,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-09-11 12:07:25,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-11 12:07:25,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-09-11 12:07:25,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 12:07:25,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-11 12:07:25,241 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-11 12:07:25,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:25,241 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-11 12:07:25,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:25,242 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-11 12:07:25,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 12:07:25,242 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:25,242 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:25,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-09-11 12:07:25,445 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:25,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:25,445 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-09-11 12:07:25,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:25,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880845681] [2020-09-11 12:07:25,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:25,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:25,603 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:25,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880845681] [2020-09-11 12:07:25,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563121506] [2020-09-11 12:07:25,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:25,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:07:25,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:25,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 12:07:25,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:25,693 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:25,707 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:25,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:25,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 12:07:25,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144128466] [2020-09-11 12:07:25,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:07:25,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:25,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:07:25,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:07:25,709 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-11 12:07:26,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:26,338 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-09-11 12:07:26,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 12:07:26,339 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 12:07:26,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:26,339 INFO L225 Difference]: With dead ends: 79 [2020-09-11 12:07:26,340 INFO L226 Difference]: Without dead ends: 73 [2020-09-11 12:07:26,340 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 12:07:26,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-11 12:07:26,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-09-11 12:07:26,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 12:07:26,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-11 12:07:26,344 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-11 12:07:26,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:26,344 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-11 12:07:26,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:07:26,345 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-11 12:07:26,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 12:07:26,345 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:26,345 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:26,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:26,553 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:26,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:26,554 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-09-11 12:07:26,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:26,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828428663] [2020-09-11 12:07:26,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:26,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:26,703 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:26,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828428663] [2020-09-11 12:07:26,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143904087] [2020-09-11 12:07:26,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:26,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-11 12:07:26,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:26,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 12:07:26,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:26,779 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:26,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:26,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 12:07:26,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189278987] [2020-09-11 12:07:26,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:26,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:26,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:26,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:26,781 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-11 12:07:27,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:27,257 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-09-11 12:07:27,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 12:07:27,258 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-11 12:07:27,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:27,259 INFO L225 Difference]: With dead ends: 95 [2020-09-11 12:07:27,259 INFO L226 Difference]: Without dead ends: 89 [2020-09-11 12:07:27,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 12:07:27,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-11 12:07:27,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-09-11 12:07:27,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 12:07:27,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-09-11 12:07:27,262 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-09-11 12:07:27,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:27,262 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-09-11 12:07:27,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:27,262 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-09-11 12:07:27,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 12:07:27,263 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:27,263 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:27,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-09-11 12:07:27,464 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:27,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:27,464 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-09-11 12:07:27,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:27,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815682799] [2020-09-11 12:07:27,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:27,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:27,585 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:27,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815682799] [2020-09-11 12:07:27,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698541511] [2020-09-11 12:07:27,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:27,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-11 12:07:27,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:27,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 12:07:27,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:27,668 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:27,682 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:27,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:27,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 12:07:27,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929581519] [2020-09-11 12:07:27,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:07:27,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:27,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:07:27,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:07:27,684 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-09-11 12:07:28,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:28,330 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-09-11 12:07:28,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 12:07:28,331 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 12:07:28,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:28,331 INFO L225 Difference]: With dead ends: 76 [2020-09-11 12:07:28,332 INFO L226 Difference]: Without dead ends: 68 [2020-09-11 12:07:28,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 12:07:28,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-11 12:07:28,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-09-11 12:07:28,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-11 12:07:28,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-09-11 12:07:28,334 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-09-11 12:07:28,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:28,335 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-09-11 12:07:28,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:07:28,335 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-09-11 12:07:28,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 12:07:28,335 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:28,336 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:28,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:28,537 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:28,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:28,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-09-11 12:07:28,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:28,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662740597] [2020-09-11 12:07:28,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:28,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:28,677 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:28,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662740597] [2020-09-11 12:07:28,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754988227] [2020-09-11 12:07:28,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:28,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:28,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 12:07:28,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:28,758 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:07:28,772 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:28,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:28,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 12:07:28,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656377284] [2020-09-11 12:07:28,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:07:28,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:28,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:07:28,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:07:28,775 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-09-11 12:07:29,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:29,414 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-09-11 12:07:29,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 12:07:29,415 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 12:07:29,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:29,416 INFO L225 Difference]: With dead ends: 84 [2020-09-11 12:07:29,416 INFO L226 Difference]: Without dead ends: 79 [2020-09-11 12:07:29,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 12:07:29,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-11 12:07:29,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-09-11 12:07:29,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 12:07:29,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-11 12:07:29,420 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-09-11 12:07:29,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:29,420 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-11 12:07:29,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:07:29,420 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-11 12:07:29,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 12:07:29,421 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:29,421 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:29,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-09-11 12:07:29,629 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:29,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:29,630 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-09-11 12:07:29,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:29,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149391049] [2020-09-11 12:07:29,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:29,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:29,796 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:29,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149391049] [2020-09-11 12:07:29,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072247537] [2020-09-11 12:07:29,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:29,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:07:29,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:29,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 12:07:29,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:29,882 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:07:29,899 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:29,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:29,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 12:07:29,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500245126] [2020-09-11 12:07:29,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 12:07:29,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:29,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 12:07:29,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:07:29,901 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-09-11 12:07:30,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:30,571 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-09-11 12:07:30,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 12:07:30,572 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 12:07:30,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:30,572 INFO L225 Difference]: With dead ends: 72 [2020-09-11 12:07:30,573 INFO L226 Difference]: Without dead ends: 67 [2020-09-11 12:07:30,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-09-11 12:07:30,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-11 12:07:30,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-09-11 12:07:30,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 12:07:30,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-09-11 12:07:30,575 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-09-11 12:07:30,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:30,575 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-09-11 12:07:30,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 12:07:30,575 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-09-11 12:07:30,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 12:07:30,576 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:30,577 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:30,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-09-11 12:07:30,784 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:30,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:30,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-09-11 12:07:30,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:30,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171702074] [2020-09-11 12:07:30,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:30,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:30,988 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:30,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171702074] [2020-09-11 12:07:30,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734090649] [2020-09-11 12:07:30,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:31,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-11 12:07:31,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:31,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 12:07:31,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:31,058 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:31,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:31,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 12:07:31,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140511841] [2020-09-11 12:07:31,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:07:31,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:31,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:07:31,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:07:31,059 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-09-11 12:07:31,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:31,352 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-09-11 12:07:31,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:07:31,353 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-11 12:07:31,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:31,354 INFO L225 Difference]: With dead ends: 78 [2020-09-11 12:07:31,354 INFO L226 Difference]: Without dead ends: 72 [2020-09-11 12:07:31,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-09-11 12:07:31,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-11 12:07:31,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-09-11 12:07:31,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 12:07:31,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-09-11 12:07:31,357 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-09-11 12:07:31,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:31,357 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-09-11 12:07:31,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:07:31,358 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-09-11 12:07:31,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 12:07:31,358 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:31,358 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:31,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:31,559 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:31,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:31,560 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-09-11 12:07:31,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:31,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696462253] [2020-09-11 12:07:31,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:31,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:31,748 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:31,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696462253] [2020-09-11 12:07:31,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178311288] [2020-09-11 12:07:31,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:31,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:07:31,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:31,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 12:07:31,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:31,827 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:31,838 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:31,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:31,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 12:07:31,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833681063] [2020-09-11 12:07:31,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 12:07:31,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:31,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 12:07:31,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:07:31,840 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-09-11 12:07:32,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:32,184 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-09-11 12:07:32,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:07:32,184 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 12:07:32,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:32,185 INFO L225 Difference]: With dead ends: 90 [2020-09-11 12:07:32,185 INFO L226 Difference]: Without dead ends: 84 [2020-09-11 12:07:32,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2020-09-11 12:07:32,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-11 12:07:32,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-09-11 12:07:32,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 12:07:32,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-09-11 12:07:32,188 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-09-11 12:07:32,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:32,189 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-09-11 12:07:32,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 12:07:32,189 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-09-11 12:07:32,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 12:07:32,189 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:32,190 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:32,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:32,398 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:32,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:32,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-09-11 12:07:32,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:32,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21190420] [2020-09-11 12:07:32,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:32,591 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:32,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21190420] [2020-09-11 12:07:32,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930329890] [2020-09-11 12:07:32,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:32,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-11 12:07:32,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:32,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 12:07:32,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:32,662 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:32,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:32,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 12:07:32,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949857769] [2020-09-11 12:07:32,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:07:32,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:32,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:07:32,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:07:32,664 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-09-11 12:07:33,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:33,061 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-09-11 12:07:33,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:07:33,062 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-11 12:07:33,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:33,063 INFO L225 Difference]: With dead ends: 91 [2020-09-11 12:07:33,063 INFO L226 Difference]: Without dead ends: 85 [2020-09-11 12:07:33,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-09-11 12:07:33,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-11 12:07:33,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-09-11 12:07:33,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-11 12:07:33,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-09-11 12:07:33,066 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-09-11 12:07:33,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:33,067 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-09-11 12:07:33,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:07:33,067 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-09-11 12:07:33,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 12:07:33,067 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:33,067 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:33,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:33,268 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:33,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:33,269 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-09-11 12:07:33,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:33,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280512980] [2020-09-11 12:07:33,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:33,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:33,436 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:33,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280512980] [2020-09-11 12:07:33,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667731196] [2020-09-11 12:07:33,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:33,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-11 12:07:33,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:33,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 12:07:33,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:33,537 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:33,548 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:33,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:33,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 12:07:33,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212353307] [2020-09-11 12:07:33,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 12:07:33,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:33,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 12:07:33,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:07:33,550 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-09-11 12:07:33,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:33,953 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-09-11 12:07:33,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:07:33,956 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 12:07:33,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:33,957 INFO L225 Difference]: With dead ends: 99 [2020-09-11 12:07:33,957 INFO L226 Difference]: Without dead ends: 93 [2020-09-11 12:07:33,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-09-11 12:07:33,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-11 12:07:33,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-09-11 12:07:33,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 12:07:33,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-09-11 12:07:33,959 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-09-11 12:07:33,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:33,959 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-09-11 12:07:33,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 12:07:33,960 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-09-11 12:07:33,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 12:07:33,960 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:33,960 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:34,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:34,161 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:34,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:34,161 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-09-11 12:07:34,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:34,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820666488] [2020-09-11 12:07:34,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:34,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:34,313 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:34,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820666488] [2020-09-11 12:07:34,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803312577] [2020-09-11 12:07:34,314 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:34,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 12:07:34,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:34,374 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:34,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:34,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 12:07:34,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818173758] [2020-09-11 12:07:34,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:07:34,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:34,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:07:34,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:07:34,375 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-09-11 12:07:34,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:34,827 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-09-11 12:07:34,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 12:07:34,827 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-11 12:07:34,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:34,829 INFO L225 Difference]: With dead ends: 99 [2020-09-11 12:07:34,829 INFO L226 Difference]: Without dead ends: 93 [2020-09-11 12:07:34,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-09-11 12:07:34,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-11 12:07:34,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-09-11 12:07:34,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-11 12:07:34,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-09-11 12:07:34,831 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-09-11 12:07:34,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:34,832 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-09-11 12:07:34,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:07:34,832 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-09-11 12:07:34,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 12:07:34,832 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:34,832 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:35,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-09-11 12:07:35,033 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:35,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:35,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-09-11 12:07:35,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:35,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844543138] [2020-09-11 12:07:35,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:35,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:35,206 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:35,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844543138] [2020-09-11 12:07:35,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938572336] [2020-09-11 12:07:35,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:35,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:07:35,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:35,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 12:07:35,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:35,288 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:35,302 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:35,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:35,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 12:07:35,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606393146] [2020-09-11 12:07:35,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 12:07:35,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:35,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 12:07:35,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:07:35,303 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-09-11 12:07:35,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:35,834 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-09-11 12:07:35,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:07:35,835 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 12:07:35,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:35,836 INFO L225 Difference]: With dead ends: 96 [2020-09-11 12:07:35,836 INFO L226 Difference]: Without dead ends: 90 [2020-09-11 12:07:35,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 12:07:35,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-11 12:07:35,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-09-11 12:07:35,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-11 12:07:35,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-09-11 12:07:35,840 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-09-11 12:07:35,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:35,840 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-09-11 12:07:35,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 12:07:35,840 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-09-11 12:07:35,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 12:07:35,840 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:35,841 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:36,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:36,042 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:36,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:36,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-09-11 12:07:36,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:36,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209457483] [2020-09-11 12:07:36,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:36,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:36,217 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:36,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209457483] [2020-09-11 12:07:36,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227059358] [2020-09-11 12:07:36,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:36,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-11 12:07:36,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:36,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 12:07:36,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:36,304 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:36,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:36,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 12:07:36,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081694891] [2020-09-11 12:07:36,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:07:36,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:36,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:07:36,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:07:36,306 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-09-11 12:07:36,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:36,812 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-09-11 12:07:36,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 12:07:36,813 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-11 12:07:36,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:36,814 INFO L225 Difference]: With dead ends: 97 [2020-09-11 12:07:36,814 INFO L226 Difference]: Without dead ends: 91 [2020-09-11 12:07:36,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 12:07:36,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-11 12:07:36,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-09-11 12:07:36,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 12:07:36,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-11 12:07:36,821 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-09-11 12:07:36,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:36,821 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-11 12:07:36,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:07:36,821 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-11 12:07:36,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 12:07:36,822 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:36,822 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:37,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-09-11 12:07:37,031 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:37,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:37,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-09-11 12:07:37,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:37,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480250466] [2020-09-11 12:07:37,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:37,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:37,233 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:37,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480250466] [2020-09-11 12:07:37,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549846946] [2020-09-11 12:07:37,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:37,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:07:37,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:37,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 12:07:37,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:37,341 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:37,358 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:37,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:37,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 12:07:37,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966647320] [2020-09-11 12:07:37,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 12:07:37,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:37,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 12:07:37,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:07:37,360 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-09-11 12:07:38,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:38,051 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-09-11 12:07:38,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 12:07:38,051 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 12:07:38,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:38,052 INFO L225 Difference]: With dead ends: 94 [2020-09-11 12:07:38,052 INFO L226 Difference]: Without dead ends: 88 [2020-09-11 12:07:38,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-09-11 12:07:38,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-11 12:07:38,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-09-11 12:07:38,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 12:07:38,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-11 12:07:38,055 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-09-11 12:07:38,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:38,055 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-11 12:07:38,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 12:07:38,056 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-11 12:07:38,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 12:07:38,056 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:38,056 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:38,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:38,263 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:38,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:38,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-09-11 12:07:38,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:38,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023798524] [2020-09-11 12:07:38,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:38,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:38,450 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:38,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023798524] [2020-09-11 12:07:38,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526612810] [2020-09-11 12:07:38,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:38,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-11 12:07:38,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:38,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 12:07:38,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:38,552 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:38,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:38,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 12:07:38,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375020308] [2020-09-11 12:07:38,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:07:38,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:38,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:07:38,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:07:38,554 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-09-11 12:07:39,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:39,178 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-09-11 12:07:39,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 12:07:39,178 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-11 12:07:39,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:39,179 INFO L225 Difference]: With dead ends: 95 [2020-09-11 12:07:39,179 INFO L226 Difference]: Without dead ends: 89 [2020-09-11 12:07:39,180 INFO L675 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 [2020-09-11 12:07:39,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-11 12:07:39,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-09-11 12:07:39,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-11 12:07:39,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-09-11 12:07:39,182 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-09-11 12:07:39,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:39,182 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-09-11 12:07:39,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:07:39,183 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-09-11 12:07:39,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 12:07:39,183 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:39,183 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:39,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-09-11 12:07:39,392 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:39,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:39,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-09-11 12:07:39,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:39,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829664024] [2020-09-11 12:07:39,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:39,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:39,556 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:39,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829664024] [2020-09-11 12:07:39,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611446024] [2020-09-11 12:07:39,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:39,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-11 12:07:39,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:39,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 12:07:39,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:39,640 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:39,654 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:39,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:39,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 12:07:39,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097881842] [2020-09-11 12:07:39,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 12:07:39,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:39,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 12:07:39,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:07:39,656 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-09-11 12:07:40,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:40,342 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-09-11 12:07:40,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 12:07:40,343 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 12:07:40,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:40,344 INFO L225 Difference]: With dead ends: 92 [2020-09-11 12:07:40,344 INFO L226 Difference]: Without dead ends: 86 [2020-09-11 12:07:40,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2020-09-11 12:07:40,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-11 12:07:40,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-09-11 12:07:40,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 12:07:40,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-11 12:07:40,347 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-09-11 12:07:40,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:40,348 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-11 12:07:40,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 12:07:40,348 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-11 12:07:40,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 12:07:40,348 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:40,348 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:40,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:40,556 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:40,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:40,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-09-11 12:07:40,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:40,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594078464] [2020-09-11 12:07:40,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:40,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:40,711 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:40,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594078464] [2020-09-11 12:07:40,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029474505] [2020-09-11 12:07:40,712 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:40,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:40,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 12:07:40,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:40,791 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:40,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:40,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 12:07:40,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927141120] [2020-09-11 12:07:40,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:07:40,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:40,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:07:40,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:07:40,793 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-09-11 12:07:41,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:41,386 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-09-11 12:07:41,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 12:07:41,386 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-11 12:07:41,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:41,387 INFO L225 Difference]: With dead ends: 112 [2020-09-11 12:07:41,387 INFO L226 Difference]: Without dead ends: 106 [2020-09-11 12:07:41,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-09-11 12:07:41,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-11 12:07:41,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-09-11 12:07:41,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 12:07:41,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-09-11 12:07:41,390 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-09-11 12:07:41,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:41,390 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-09-11 12:07:41,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:07:41,390 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-09-11 12:07:41,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 12:07:41,391 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:41,391 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:41,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:41,592 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:41,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:41,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-09-11 12:07:41,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:41,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593613068] [2020-09-11 12:07:41,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:41,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:41,725 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:41,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593613068] [2020-09-11 12:07:41,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25857120] [2020-09-11 12:07:41,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:41,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:07:41,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:41,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 12:07:41,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:41,813 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:41,831 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:41,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:41,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 12:07:41,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183237170] [2020-09-11 12:07:41,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 12:07:41,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:41,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 12:07:41,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:07:41,834 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-09-11 12:07:42,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:42,656 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-09-11 12:07:42,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 12:07:42,657 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 12:07:42,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:42,659 INFO L225 Difference]: With dead ends: 93 [2020-09-11 12:07:42,659 INFO L226 Difference]: Without dead ends: 85 [2020-09-11 12:07:42,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=469, Invalid=1013, Unknown=0, NotChecked=0, Total=1482 [2020-09-11 12:07:42,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-11 12:07:42,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-09-11 12:07:42,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-11 12:07:42,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-09-11 12:07:42,663 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-09-11 12:07:42,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:42,663 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-09-11 12:07:42,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 12:07:42,664 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-09-11 12:07:42,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 12:07:42,665 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:42,665 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:42,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:42,877 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:42,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:42,878 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-09-11 12:07:42,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:42,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341701919] [2020-09-11 12:07:42,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:42,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:43,096 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:43,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341701919] [2020-09-11 12:07:43,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085833112] [2020-09-11 12:07:43,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:43,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-11 12:07:43,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:43,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 12:07:43,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:43,166 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:43,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:43,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 12:07:43,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13909054] [2020-09-11 12:07:43,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 12:07:43,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:43,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 12:07:43,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:07:43,168 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-09-11 12:07:43,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:43,516 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-09-11 12:07:43,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 12:07:43,517 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-11 12:07:43,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:43,518 INFO L225 Difference]: With dead ends: 104 [2020-09-11 12:07:43,518 INFO L226 Difference]: Without dead ends: 98 [2020-09-11 12:07:43,519 INFO L675 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 [2020-09-11 12:07:43,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-11 12:07:43,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-09-11 12:07:43,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 12:07:43,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-11 12:07:43,521 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-11 12:07:43,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:43,522 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-11 12:07:43,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 12:07:43,522 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-11 12:07:43,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 12:07:43,522 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:43,523 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:43,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:43,729 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:43,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:43,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-09-11 12:07:43,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:43,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704527948] [2020-09-11 12:07:43,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:43,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:43,949 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:43,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704527948] [2020-09-11 12:07:43,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347103158] [2020-09-11 12:07:43,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:44,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:07:44,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:44,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 12:07:44,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:44,038 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:44,050 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:44,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:44,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 12:07:44,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501635061] [2020-09-11 12:07:44,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:07:44,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:44,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:07:44,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:07:44,052 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-11 12:07:44,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:44,521 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-09-11 12:07:44,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:07:44,522 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 12:07:44,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:44,523 INFO L225 Difference]: With dead ends: 101 [2020-09-11 12:07:44,523 INFO L226 Difference]: Without dead ends: 95 [2020-09-11 12:07:44,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-09-11 12:07:44,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-11 12:07:44,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-09-11 12:07:44,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 12:07:44,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-11 12:07:44,526 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-11 12:07:44,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:44,527 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-11 12:07:44,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:07:44,527 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-11 12:07:44,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 12:07:44,527 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:44,527 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:44,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:44,736 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:44,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:44,737 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-09-11 12:07:44,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:44,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513866587] [2020-09-11 12:07:44,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:44,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:44,932 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:44,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513866587] [2020-09-11 12:07:44,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221237744] [2020-09-11 12:07:44,933 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:45,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-11 12:07:45,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:45,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 12:07:45,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:45,035 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:45,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:45,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 12:07:45,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732140961] [2020-09-11 12:07:45,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 12:07:45,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:45,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 12:07:45,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:07:45,038 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-11 12:07:45,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:45,539 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-09-11 12:07:45,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:07:45,540 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-11 12:07:45,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:45,541 INFO L225 Difference]: With dead ends: 98 [2020-09-11 12:07:45,541 INFO L226 Difference]: Without dead ends: 92 [2020-09-11 12:07:45,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-09-11 12:07:45,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-11 12:07:45,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-09-11 12:07:45,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 12:07:45,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-11 12:07:45,548 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-11 12:07:45,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:45,549 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-11 12:07:45,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 12:07:45,550 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-11 12:07:45,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 12:07:45,551 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:45,551 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:45,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:45,763 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:45,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:45,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-09-11 12:07:45,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:45,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911234369] [2020-09-11 12:07:45,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:45,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:46,016 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:46,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911234369] [2020-09-11 12:07:46,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800133118] [2020-09-11 12:07:46,017 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:46,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-11 12:07:46,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:46,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 12:07:46,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:46,130 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:46,151 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:46,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:46,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 12:07:46,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750192309] [2020-09-11 12:07:46,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:07:46,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:46,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:07:46,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:07:46,155 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-11 12:07:46,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:46,761 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-09-11 12:07:46,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:07:46,762 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 12:07:46,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:46,762 INFO L225 Difference]: With dead ends: 97 [2020-09-11 12:07:46,763 INFO L226 Difference]: Without dead ends: 91 [2020-09-11 12:07:46,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 12:07:46,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-11 12:07:46,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-09-11 12:07:46,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 12:07:46,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-11 12:07:46,766 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-11 12:07:46,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:46,766 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-11 12:07:46,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:07:46,767 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-11 12:07:46,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 12:07:46,767 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:46,767 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:46,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:46,975 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:46,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:46,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-09-11 12:07:46,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:46,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941389657] [2020-09-11 12:07:46,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:46,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:47,186 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:47,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941389657] [2020-09-11 12:07:47,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525370789] [2020-09-11 12:07:47,187 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:47,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 12:07:47,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:47,263 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:47,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:47,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 12:07:47,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463399794] [2020-09-11 12:07:47,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 12:07:47,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:47,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 12:07:47,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:07:47,265 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-11 12:07:47,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:47,754 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-09-11 12:07:47,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 12:07:47,755 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-11 12:07:47,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:47,756 INFO L225 Difference]: With dead ends: 94 [2020-09-11 12:07:47,757 INFO L226 Difference]: Without dead ends: 88 [2020-09-11 12:07:47,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 12:07:47,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-11 12:07:47,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-09-11 12:07:47,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 12:07:47,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-11 12:07:47,760 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-11 12:07:47,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:47,761 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-11 12:07:47,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 12:07:47,761 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-11 12:07:47,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 12:07:47,761 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:47,761 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:47,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-09-11 12:07:47,971 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:47,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:47,972 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-09-11 12:07:47,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:47,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575473027] [2020-09-11 12:07:47,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:47,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:48,181 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:48,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575473027] [2020-09-11 12:07:48,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219617883] [2020-09-11 12:07:48,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:48,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:07:48,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:48,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 12:07:48,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:48,266 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:48,282 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:48,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:48,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 12:07:48,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876727356] [2020-09-11 12:07:48,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:07:48,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:48,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:07:48,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:07:48,283 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-11 12:07:48,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:48,947 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-09-11 12:07:48,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 12:07:48,948 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 12:07:48,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:48,949 INFO L225 Difference]: With dead ends: 93 [2020-09-11 12:07:48,949 INFO L226 Difference]: Without dead ends: 87 [2020-09-11 12:07:48,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 12:07:48,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-11 12:07:48,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-09-11 12:07:48,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 12:07:48,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-11 12:07:48,952 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-11 12:07:48,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:48,952 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-11 12:07:48,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:07:48,953 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-11 12:07:48,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 12:07:48,953 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:48,953 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:49,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:49,154 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:49,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:49,155 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-09-11 12:07:49,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:49,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923600846] [2020-09-11 12:07:49,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:49,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:49,307 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:49,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923600846] [2020-09-11 12:07:49,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363714574] [2020-09-11 12:07:49,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:49,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-11 12:07:49,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:49,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 12:07:49,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:49,420 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:49,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:49,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 12:07:49,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878021726] [2020-09-11 12:07:49,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 12:07:49,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:49,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 12:07:49,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:07:49,423 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-11 12:07:49,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:49,966 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-09-11 12:07:49,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 12:07:49,967 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-11 12:07:49,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:49,968 INFO L225 Difference]: With dead ends: 90 [2020-09-11 12:07:49,968 INFO L226 Difference]: Without dead ends: 84 [2020-09-11 12:07:49,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-09-11 12:07:49,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-11 12:07:49,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-09-11 12:07:49,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 12:07:49,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-11 12:07:49,970 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-11 12:07:49,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:49,971 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-11 12:07:49,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 12:07:49,971 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-11 12:07:49,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 12:07:49,971 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:49,971 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:50,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-09-11 12:07:50,172 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:50,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:50,172 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-09-11 12:07:50,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:50,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090779134] [2020-09-11 12:07:50,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:50,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:50,349 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:50,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090779134] [2020-09-11 12:07:50,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240335035] [2020-09-11 12:07:50,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:50,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:07:50,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:50,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 12:07:50,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:50,439 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:50,452 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:50,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:50,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 12:07:50,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753585941] [2020-09-11 12:07:50,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:07:50,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:50,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:07:50,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:07:50,454 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-11 12:07:51,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:51,171 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-11 12:07:51,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 12:07:51,172 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 12:07:51,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:51,173 INFO L225 Difference]: With dead ends: 89 [2020-09-11 12:07:51,173 INFO L226 Difference]: Without dead ends: 83 [2020-09-11 12:07:51,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-09-11 12:07:51,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-11 12:07:51,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-09-11 12:07:51,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 12:07:51,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-11 12:07:51,178 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-11 12:07:51,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:51,178 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-11 12:07:51,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:07:51,178 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-11 12:07:51,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 12:07:51,179 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:51,179 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:51,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:51,380 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:51,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:51,380 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-09-11 12:07:51,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:51,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837471680] [2020-09-11 12:07:51,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:51,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:51,571 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:51,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837471680] [2020-09-11 12:07:51,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838004459] [2020-09-11 12:07:51,572 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:51,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-11 12:07:51,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:51,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 12:07:51,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:51,657 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:51,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:51,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 12:07:51,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791585381] [2020-09-11 12:07:51,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 12:07:51,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:51,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 12:07:51,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:07:51,659 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-11 12:07:52,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:52,306 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-09-11 12:07:52,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 12:07:52,307 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-11 12:07:52,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:52,308 INFO L225 Difference]: With dead ends: 86 [2020-09-11 12:07:52,308 INFO L226 Difference]: Without dead ends: 80 [2020-09-11 12:07:52,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-09-11 12:07:52,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-11 12:07:52,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-09-11 12:07:52,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 12:07:52,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-11 12:07:52,311 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-11 12:07:52,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:52,311 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-11 12:07:52,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 12:07:52,312 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-11 12:07:52,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 12:07:52,312 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:52,312 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:52,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:52,521 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:52,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:52,522 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-09-11 12:07:52,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:52,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730954685] [2020-09-11 12:07:52,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:52,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:52,706 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:52,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730954685] [2020-09-11 12:07:52,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692281807] [2020-09-11 12:07:52,707 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:52,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-11 12:07:52,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:52,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 12:07:52,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:52,797 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:52,812 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:52,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:52,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 12:07:52,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926481991] [2020-09-11 12:07:52,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:07:52,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:52,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:07:52,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:07:52,814 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-11 12:07:53,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:53,653 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-09-11 12:07:53,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 12:07:53,654 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 12:07:53,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:53,655 INFO L225 Difference]: With dead ends: 85 [2020-09-11 12:07:53,655 INFO L226 Difference]: Without dead ends: 79 [2020-09-11 12:07:53,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-09-11 12:07:53,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-11 12:07:53,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-09-11 12:07:53,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 12:07:53,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-11 12:07:53,657 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-11 12:07:53,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:53,657 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-11 12:07:53,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:07:53,657 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-11 12:07:53,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 12:07:53,658 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:53,658 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:53,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:53,859 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:53,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:53,859 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-09-11 12:07:53,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:53,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051054199] [2020-09-11 12:07:53,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:53,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:54,017 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:54,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051054199] [2020-09-11 12:07:54,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121965129] [2020-09-11 12:07:54,017 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:54,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:54,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 12:07:54,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:54,108 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:54,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:54,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 12:07:54,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895180179] [2020-09-11 12:07:54,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 12:07:54,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:54,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 12:07:54,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:07:54,110 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-11 12:07:54,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:54,786 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-09-11 12:07:54,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 12:07:54,787 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-11 12:07:54,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:54,787 INFO L225 Difference]: With dead ends: 101 [2020-09-11 12:07:54,787 INFO L226 Difference]: Without dead ends: 95 [2020-09-11 12:07:54,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-09-11 12:07:54,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-11 12:07:54,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-09-11 12:07:54,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-11 12:07:54,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-09-11 12:07:54,790 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-09-11 12:07:54,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:54,790 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-09-11 12:07:54,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 12:07:54,790 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-09-11 12:07:54,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 12:07:54,791 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:54,791 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:54,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:54,992 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:54,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:54,992 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-09-11 12:07:54,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:54,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073405443] [2020-09-11 12:07:54,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:55,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:55,172 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:55,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073405443] [2020-09-11 12:07:55,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400455812] [2020-09-11 12:07:55,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:55,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:07:55,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:55,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 12:07:55,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:55,261 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:55,276 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:55,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:55,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 12:07:55,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138329340] [2020-09-11 12:07:55,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:07:55,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:55,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:07:55,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:07:55,278 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-09-11 12:07:56,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:56,156 INFO L93 Difference]: Finished difference Result 82 states and 201 transitions. [2020-09-11 12:07:56,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 12:07:56,156 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 12:07:56,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:56,157 INFO L225 Difference]: With dead ends: 82 [2020-09-11 12:07:56,158 INFO L226 Difference]: Without dead ends: 74 [2020-09-11 12:07:56,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 12:07:56,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-11 12:07:56,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2020-09-11 12:07:56,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-11 12:07:56,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-09-11 12:07:56,160 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-09-11 12:07:56,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:56,160 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-09-11 12:07:56,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:07:56,160 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-09-11 12:07:56,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 12:07:56,163 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:56,163 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:56,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:56,371 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:56,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:56,372 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-09-11 12:07:56,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:56,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338586364] [2020-09-11 12:07:56,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:56,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:56,550 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:56,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338586364] [2020-09-11 12:07:56,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964434597] [2020-09-11 12:07:56,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:56,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-11 12:07:56,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:56,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 12:07:56,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:56,638 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:07:56,657 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:56,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:56,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 12:07:56,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639857620] [2020-09-11 12:07:56,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:07:56,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:56,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:07:56,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:07:56,659 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-09-11 12:07:57,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:57,483 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-09-11 12:07:57,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 12:07:57,484 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 12:07:57,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:57,485 INFO L225 Difference]: With dead ends: 92 [2020-09-11 12:07:57,485 INFO L226 Difference]: Without dead ends: 87 [2020-09-11 12:07:57,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 12:07:57,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-11 12:07:57,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-09-11 12:07:57,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 12:07:57,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-09-11 12:07:57,487 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-09-11 12:07:57,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:57,488 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-09-11 12:07:57,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:07:57,490 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-09-11 12:07:57,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 12:07:57,490 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:57,491 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:57,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:57,691 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:57,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:57,692 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-09-11 12:07:57,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:57,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103376564] [2020-09-11 12:07:57,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:57,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:57,895 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:57,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103376564] [2020-09-11 12:07:57,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595483123] [2020-09-11 12:07:57,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:57,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:07:57,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:57,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 12:07:57,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:57,983 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:07:58,007 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:58,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:58,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 12:07:58,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657030039] [2020-09-11 12:07:58,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 12:07:58,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:58,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 12:07:58,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:07:58,009 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-09-11 12:07:58,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:58,878 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-09-11 12:07:58,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 12:07:58,879 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 12:07:58,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:58,880 INFO L225 Difference]: With dead ends: 78 [2020-09-11 12:07:58,880 INFO L226 Difference]: Without dead ends: 73 [2020-09-11 12:07:58,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 12:07:58,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-11 12:07:58,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-09-11 12:07:58,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-11 12:07:58,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-09-11 12:07:58,883 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-09-11 12:07:58,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:58,883 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-09-11 12:07:58,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 12:07:58,884 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-09-11 12:07:58,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 12:07:58,884 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:58,884 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:59,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-09-11 12:07:59,087 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:59,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:59,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-09-11 12:07:59,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:59,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749582433] [2020-09-11 12:07:59,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:59,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:59,324 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:59,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749582433] [2020-09-11 12:07:59,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634271474] [2020-09-11 12:07:59,325 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:07:59,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-11 12:07:59,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:59,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 12:07:59,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:59,396 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:59,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:59,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 12:07:59,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908102525] [2020-09-11 12:07:59,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:07:59,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:59,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:07:59,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:07:59,398 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-09-11 12:07:59,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:59,781 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-11 12:07:59,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 12:07:59,782 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 12:07:59,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:59,783 INFO L225 Difference]: With dead ends: 84 [2020-09-11 12:07:59,783 INFO L226 Difference]: Without dead ends: 78 [2020-09-11 12:07:59,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-09-11 12:07:59,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-11 12:07:59,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-09-11 12:07:59,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 12:07:59,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-09-11 12:07:59,785 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-09-11 12:07:59,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:59,785 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-09-11 12:07:59,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:07:59,785 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-09-11 12:07:59,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 12:07:59,786 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:59,786 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:59,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:59,986 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:59,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:59,987 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-09-11 12:07:59,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:59,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052704136] [2020-09-11 12:07:59,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:59,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:00,244 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:00,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052704136] [2020-09-11 12:08:00,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102722664] [2020-09-11 12:08:00,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:00,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-11 12:08:00,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:00,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 12:08:00,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:00,334 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:00,354 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:00,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:00,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 12:08:00,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160107271] [2020-09-11 12:08:00,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 12:08:00,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:00,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 12:08:00,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:08:00,356 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-09-11 12:08:00,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:00,756 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-09-11 12:08:00,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:08:00,756 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 12:08:00,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:00,757 INFO L225 Difference]: With dead ends: 98 [2020-09-11 12:08:00,758 INFO L226 Difference]: Without dead ends: 92 [2020-09-11 12:08:00,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-09-11 12:08:00,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-11 12:08:00,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-09-11 12:08:00,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-11 12:08:00,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-09-11 12:08:00,760 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-09-11 12:08:00,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:00,760 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-09-11 12:08:00,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 12:08:00,761 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-09-11 12:08:00,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 12:08:00,761 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:00,761 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:00,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-09-11 12:08:00,962 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:00,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:00,962 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-09-11 12:08:00,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:00,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316581600] [2020-09-11 12:08:00,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:00,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:01,208 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:01,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316581600] [2020-09-11 12:08:01,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188690576] [2020-09-11 12:08:01,209 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:01,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:01,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 12:08:01,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:01,283 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:01,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:01,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 12:08:01,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053270277] [2020-09-11 12:08:01,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:08:01,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:01,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:08:01,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:08:01,285 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-09-11 12:08:01,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:01,765 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-09-11 12:08:01,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 12:08:01,766 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 12:08:01,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:01,767 INFO L225 Difference]: With dead ends: 99 [2020-09-11 12:08:01,768 INFO L226 Difference]: Without dead ends: 93 [2020-09-11 12:08:01,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 12:08:01,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-11 12:08:01,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-09-11 12:08:01,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 12:08:01,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-09-11 12:08:01,771 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-09-11 12:08:01,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:01,772 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-09-11 12:08:01,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:08:01,772 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-09-11 12:08:01,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 12:08:01,773 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:01,773 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:01,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:01,982 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:01,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:01,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-09-11 12:08:01,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:01,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267370439] [2020-09-11 12:08:01,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:01,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:02,284 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:02,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267370439] [2020-09-11 12:08:02,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627487029] [2020-09-11 12:08:02,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:02,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:08:02,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:02,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 12:08:02,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:02,393 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:02,404 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:02,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:02,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 12:08:02,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063558618] [2020-09-11 12:08:02,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 12:08:02,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:02,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 12:08:02,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:08:02,406 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-09-11 12:08:02,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:02,864 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-09-11 12:08:02,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:08:02,864 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 12:08:02,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:02,866 INFO L225 Difference]: With dead ends: 109 [2020-09-11 12:08:02,866 INFO L226 Difference]: Without dead ends: 103 [2020-09-11 12:08:02,866 INFO L675 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 [2020-09-11 12:08:02,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-11 12:08:02,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-09-11 12:08:02,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 12:08:02,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-09-11 12:08:02,869 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-09-11 12:08:02,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:02,870 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-09-11 12:08:02,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 12:08:02,870 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-09-11 12:08:02,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 12:08:02,870 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:02,871 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:03,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:03,080 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:03,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:03,081 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-09-11 12:08:03,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:03,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523436568] [2020-09-11 12:08:03,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:03,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:03,323 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:03,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523436568] [2020-09-11 12:08:03,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556518830] [2020-09-11 12:08:03,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:03,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-11 12:08:03,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:03,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 12:08:03,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:03,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:03,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 12:08:03,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101073359] [2020-09-11 12:08:03,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:08:03,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:03,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:08:03,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:08:03,404 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-09-11 12:08:03,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:03,966 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-09-11 12:08:03,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 12:08:03,967 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 12:08:03,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:03,968 INFO L225 Difference]: With dead ends: 109 [2020-09-11 12:08:03,969 INFO L226 Difference]: Without dead ends: 103 [2020-09-11 12:08:03,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 12:08:03,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-11 12:08:03,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-09-11 12:08:03,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-11 12:08:03,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-09-11 12:08:03,973 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-09-11 12:08:03,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:03,973 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-09-11 12:08:03,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:08:03,973 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-09-11 12:08:03,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 12:08:03,974 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:03,974 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:04,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-09-11 12:08:04,185 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:04,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:04,186 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-09-11 12:08:04,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:04,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574395856] [2020-09-11 12:08:04,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:04,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:04,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574395856] [2020-09-11 12:08:04,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652877386] [2020-09-11 12:08:04,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:04,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:08:04,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:04,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 12:08:04,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:04,502 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:04,517 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:04,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:04,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 12:08:04,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908698327] [2020-09-11 12:08:04,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 12:08:04,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:04,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 12:08:04,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:08:04,519 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-09-11 12:08:05,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:05,159 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-09-11 12:08:05,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 12:08:05,160 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 12:08:05,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:05,162 INFO L225 Difference]: With dead ends: 106 [2020-09-11 12:08:05,162 INFO L226 Difference]: Without dead ends: 100 [2020-09-11 12:08:05,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-09-11 12:08:05,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-11 12:08:05,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-09-11 12:08:05,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 12:08:05,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-09-11 12:08:05,165 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-09-11 12:08:05,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:05,165 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-09-11 12:08:05,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 12:08:05,165 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-09-11 12:08:05,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 12:08:05,166 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:05,166 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:05,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-09-11 12:08:05,375 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:05,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:05,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-09-11 12:08:05,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:05,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159410798] [2020-09-11 12:08:05,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:05,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:05,591 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:05,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159410798] [2020-09-11 12:08:05,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748554607] [2020-09-11 12:08:05,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:05,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-11 12:08:05,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:05,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 12:08:05,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:05,671 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:05,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:05,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 12:08:05,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970996610] [2020-09-11 12:08:05,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:08:05,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:05,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:08:05,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:08:05,673 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-09-11 12:08:06,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:06,282 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-09-11 12:08:06,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 12:08:06,283 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 12:08:06,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:06,284 INFO L225 Difference]: With dead ends: 107 [2020-09-11 12:08:06,284 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 12:08:06,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-09-11 12:08:06,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 12:08:06,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-09-11 12:08:06,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-11 12:08:06,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-09-11 12:08:06,287 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-09-11 12:08:06,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:06,288 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-09-11 12:08:06,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:08:06,288 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-09-11 12:08:06,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 12:08:06,288 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:06,288 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:06,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:06,489 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:06,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:06,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-09-11 12:08:06,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:06,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448570017] [2020-09-11 12:08:06,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:06,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:06,698 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:06,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448570017] [2020-09-11 12:08:06,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506890992] [2020-09-11 12:08:06,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:06,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-11 12:08:06,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:06,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 12:08:06,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:06,786 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:06,801 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:06,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:06,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 12:08:06,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442225132] [2020-09-11 12:08:06,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 12:08:06,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:06,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 12:08:06,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:08:06,802 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-09-11 12:08:07,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:07,546 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-09-11 12:08:07,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 12:08:07,547 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 12:08:07,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:07,548 INFO L225 Difference]: With dead ends: 104 [2020-09-11 12:08:07,548 INFO L226 Difference]: Without dead ends: 98 [2020-09-11 12:08:07,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-09-11 12:08:07,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-11 12:08:07,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-09-11 12:08:07,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 12:08:07,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-09-11 12:08:07,552 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-09-11 12:08:07,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:07,553 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-09-11 12:08:07,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 12:08:07,553 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-09-11 12:08:07,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 12:08:07,553 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:07,553 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:07,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-09-11 12:08:07,760 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:07,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:07,761 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-09-11 12:08:07,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:07,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106612293] [2020-09-11 12:08:07,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:07,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:07,973 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:07,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106612293] [2020-09-11 12:08:07,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066240891] [2020-09-11 12:08:07,973 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:08,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:08,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 12:08:08,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:08,050 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:08,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:08,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 12:08:08,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196062369] [2020-09-11 12:08:08,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:08:08,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:08,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:08:08,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:08:08,051 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-09-11 12:08:08,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:08,712 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-09-11 12:08:08,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 12:08:08,713 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 12:08:08,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:08,713 INFO L225 Difference]: With dead ends: 105 [2020-09-11 12:08:08,713 INFO L226 Difference]: Without dead ends: 99 [2020-09-11 12:08:08,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-09-11 12:08:08,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-11 12:08:08,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-09-11 12:08:08,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 12:08:08,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-11 12:08:08,716 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-09-11 12:08:08,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:08,717 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-11 12:08:08,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:08:08,717 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-11 12:08:08,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 12:08:08,717 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:08,717 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:08,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:08,925 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:08,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:08,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-09-11 12:08:08,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:08,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902947726] [2020-09-11 12:08:08,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:08,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:09,140 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:09,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902947726] [2020-09-11 12:08:09,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496821362] [2020-09-11 12:08:09,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:09,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:08:09,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:09,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 12:08:09,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:09,227 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:09,242 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:09,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:09,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 12:08:09,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345433967] [2020-09-11 12:08:09,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 12:08:09,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:09,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 12:08:09,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:08:09,244 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-09-11 12:08:10,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:10,053 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-09-11 12:08:10,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 12:08:10,053 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 12:08:10,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:10,054 INFO L225 Difference]: With dead ends: 102 [2020-09-11 12:08:10,054 INFO L226 Difference]: Without dead ends: 96 [2020-09-11 12:08:10,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-09-11 12:08:10,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-11 12:08:10,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-09-11 12:08:10,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 12:08:10,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-11 12:08:10,057 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-09-11 12:08:10,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:10,057 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-11 12:08:10,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 12:08:10,057 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-11 12:08:10,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 12:08:10,058 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:10,058 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:10,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-09-11 12:08:10,259 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:10,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:10,259 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-09-11 12:08:10,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:10,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115451071] [2020-09-11 12:08:10,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:10,454 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:10,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115451071] [2020-09-11 12:08:10,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168015704] [2020-09-11 12:08:10,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:10,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-11 12:08:10,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:10,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 12:08:10,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:10,532 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:10,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:10,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 12:08:10,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784774757] [2020-09-11 12:08:10,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:08:10,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:10,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:08:10,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:08:10,533 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-09-11 12:08:11,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:11,244 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-09-11 12:08:11,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 12:08:11,245 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 12:08:11,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:11,245 INFO L225 Difference]: With dead ends: 103 [2020-09-11 12:08:11,246 INFO L226 Difference]: Without dead ends: 97 [2020-09-11 12:08:11,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 12:08:11,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-11 12:08:11,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-09-11 12:08:11,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-11 12:08:11,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-09-11 12:08:11,248 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-09-11 12:08:11,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:11,248 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-09-11 12:08:11,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:08:11,248 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-09-11 12:08:11,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 12:08:11,249 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:11,249 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:11,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:11,450 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:11,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:11,450 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-09-11 12:08:11,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:11,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083837439] [2020-09-11 12:08:11,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:11,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:11,660 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:11,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083837439] [2020-09-11 12:08:11,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816054787] [2020-09-11 12:08:11,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:11,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:08:11,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:11,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 12:08:11,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:11,747 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:11,764 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:11,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:11,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 12:08:11,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346791110] [2020-09-11 12:08:11,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 12:08:11,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:11,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 12:08:11,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:08:11,766 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-09-11 12:08:12,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:12,683 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-09-11 12:08:12,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 12:08:12,684 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 12:08:12,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:12,685 INFO L225 Difference]: With dead ends: 100 [2020-09-11 12:08:12,685 INFO L226 Difference]: Without dead ends: 94 [2020-09-11 12:08:12,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 12:08:12,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-11 12:08:12,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-09-11 12:08:12,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 12:08:12,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-09-11 12:08:12,687 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-09-11 12:08:12,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:12,687 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-09-11 12:08:12,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 12:08:12,687 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-09-11 12:08:12,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 12:08:12,688 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:12,688 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:12,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-09-11 12:08:12,896 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:12,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:12,897 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-09-11 12:08:12,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:12,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018141419] [2020-09-11 12:08:12,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:12,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:13,079 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:13,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018141419] [2020-09-11 12:08:13,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210532520] [2020-09-11 12:08:13,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:13,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-11 12:08:13,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:13,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 12:08:13,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:13,190 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:13,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:13,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 12:08:13,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123989786] [2020-09-11 12:08:13,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:08:13,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:13,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:08:13,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:08:13,193 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-09-11 12:08:13,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:13,951 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-09-11 12:08:13,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 12:08:13,951 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 12:08:13,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:13,952 INFO L225 Difference]: With dead ends: 120 [2020-09-11 12:08:13,952 INFO L226 Difference]: Without dead ends: 114 [2020-09-11 12:08:13,953 INFO L675 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 [2020-09-11 12:08:13,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-11 12:08:13,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-09-11 12:08:13,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-11 12:08:13,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-09-11 12:08:13,955 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-09-11 12:08:13,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:13,955 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-09-11 12:08:13,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:08:13,955 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-09-11 12:08:13,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 12:08:13,956 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:13,956 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:14,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-09-11 12:08:14,163 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:14,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:14,164 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-09-11 12:08:14,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:14,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328454068] [2020-09-11 12:08:14,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:14,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:14,399 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:14,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328454068] [2020-09-11 12:08:14,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244366706] [2020-09-11 12:08:14,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:14,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-11 12:08:14,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:14,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 12:08:14,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:14,505 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:14,524 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:14,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:14,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 12:08:14,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4264774] [2020-09-11 12:08:14,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 12:08:14,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:14,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 12:08:14,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:08:14,526 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-09-11 12:08:15,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:15,430 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-09-11 12:08:15,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 12:08:15,430 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 12:08:15,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:15,431 INFO L225 Difference]: With dead ends: 101 [2020-09-11 12:08:15,431 INFO L226 Difference]: Without dead ends: 93 [2020-09-11 12:08:15,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 12:08:15,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-11 12:08:15,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-09-11 12:08:15,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-11 12:08:15,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-09-11 12:08:15,434 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-09-11 12:08:15,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:15,434 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-09-11 12:08:15,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 12:08:15,434 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-09-11 12:08:15,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 12:08:15,435 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:15,435 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:15,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:15,636 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:15,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:15,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-09-11 12:08:15,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:15,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252907984] [2020-09-11 12:08:15,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:15,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:15,916 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:15,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252907984] [2020-09-11 12:08:15,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758181428] [2020-09-11 12:08:15,917 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:15,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:15,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 12:08:15,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:15,986 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:15,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:15,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 12:08:15,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715153163] [2020-09-11 12:08:15,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 12:08:15,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:15,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 12:08:15,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:08:15,988 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-09-11 12:08:16,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:16,412 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-09-11 12:08:16,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:08:16,413 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 12:08:16,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:16,414 INFO L225 Difference]: With dead ends: 114 [2020-09-11 12:08:16,414 INFO L226 Difference]: Without dead ends: 108 [2020-09-11 12:08:16,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 12:08:16,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-11 12:08:16,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-09-11 12:08:16,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 12:08:16,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 12:08:16,417 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-11 12:08:16,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:16,417 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 12:08:16,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 12:08:16,417 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 12:08:16,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 12:08:16,417 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:16,418 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:16,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:16,624 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:16,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:16,625 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-09-11 12:08:16,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:16,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540946967] [2020-09-11 12:08:16,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:16,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:16,908 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:16,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540946967] [2020-09-11 12:08:16,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308525847] [2020-09-11 12:08:16,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:16,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:08:16,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:16,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 12:08:16,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:16,993 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:17,005 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:17,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:17,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 12:08:17,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77688447] [2020-09-11 12:08:17,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 12:08:17,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:17,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 12:08:17,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:08:17,006 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-11 12:08:17,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:17,561 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-09-11 12:08:17,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:08:17,562 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 12:08:17,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:17,563 INFO L225 Difference]: With dead ends: 111 [2020-09-11 12:08:17,563 INFO L226 Difference]: Without dead ends: 105 [2020-09-11 12:08:17,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 12:08:17,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-11 12:08:17,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-09-11 12:08:17,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 12:08:17,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 12:08:17,566 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-11 12:08:17,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:17,566 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 12:08:17,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 12:08:17,566 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 12:08:17,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 12:08:17,566 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:17,566 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:17,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-09-11 12:08:17,767 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:17,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:17,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-09-11 12:08:17,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:17,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602271292] [2020-09-11 12:08:17,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:17,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:18,048 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:18,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602271292] [2020-09-11 12:08:18,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949817268] [2020-09-11 12:08:18,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:18,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-11 12:08:18,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:18,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 12:08:18,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:18,127 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:18,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:18,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 12:08:18,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703394525] [2020-09-11 12:08:18,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 12:08:18,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:18,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 12:08:18,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:08:18,128 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-11 12:08:18,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:18,675 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-09-11 12:08:18,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 12:08:18,676 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 12:08:18,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:18,676 INFO L225 Difference]: With dead ends: 108 [2020-09-11 12:08:18,676 INFO L226 Difference]: Without dead ends: 102 [2020-09-11 12:08:18,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-09-11 12:08:18,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-11 12:08:18,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-09-11 12:08:18,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 12:08:18,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 12:08:18,679 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-11 12:08:18,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:18,679 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 12:08:18,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 12:08:18,679 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 12:08:18,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 12:08:18,680 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:18,680 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:18,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:18,886 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:18,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:18,887 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-09-11 12:08:18,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:18,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401371315] [2020-09-11 12:08:18,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:18,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:19,156 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:19,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401371315] [2020-09-11 12:08:19,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839728749] [2020-09-11 12:08:19,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:19,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:08:19,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:19,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 12:08:19,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:19,235 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:19,249 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:19,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:19,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 12:08:19,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283933584] [2020-09-11 12:08:19,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 12:08:19,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:19,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 12:08:19,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:08:19,250 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-11 12:08:19,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:19,886 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-09-11 12:08:19,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 12:08:19,887 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 12:08:19,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:19,888 INFO L225 Difference]: With dead ends: 107 [2020-09-11 12:08:19,888 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 12:08:19,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-09-11 12:08:19,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 12:08:19,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-09-11 12:08:19,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 12:08:19,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 12:08:19,891 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-11 12:08:19,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:19,891 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 12:08:19,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 12:08:19,892 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 12:08:19,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 12:08:19,892 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:19,892 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:20,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-09-11 12:08:20,093 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:20,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:20,094 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-09-11 12:08:20,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:20,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240477404] [2020-09-11 12:08:20,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:20,352 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:20,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240477404] [2020-09-11 12:08:20,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843754738] [2020-09-11 12:08:20,353 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:20,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-11 12:08:20,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:20,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 12:08:20,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:20,434 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:20,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:20,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 12:08:20,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813067808] [2020-09-11 12:08:20,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 12:08:20,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:20,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 12:08:20,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:08:20,435 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-11 12:08:21,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:21,025 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-11 12:08:21,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 12:08:21,030 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 12:08:21,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:21,031 INFO L225 Difference]: With dead ends: 104 [2020-09-11 12:08:21,031 INFO L226 Difference]: Without dead ends: 98 [2020-09-11 12:08:21,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-09-11 12:08:21,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-11 12:08:21,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-09-11 12:08:21,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 12:08:21,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 12:08:21,033 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-11 12:08:21,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:21,033 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 12:08:21,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 12:08:21,033 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 12:08:21,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 12:08:21,034 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:21,034 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:21,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-09-11 12:08:21,235 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:21,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:21,235 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-09-11 12:08:21,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:21,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092335117] [2020-09-11 12:08:21,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:21,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:21,491 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:21,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092335117] [2020-09-11 12:08:21,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800880206] [2020-09-11 12:08:21,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:21,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-11 12:08:21,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:21,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 12:08:21,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:21,575 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:21,593 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:21,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:21,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 12:08:21,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987102226] [2020-09-11 12:08:21,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 12:08:21,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:21,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 12:08:21,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:08:21,594 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-11 12:08:22,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:22,337 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-09-11 12:08:22,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 12:08:22,338 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 12:08:22,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:22,339 INFO L225 Difference]: With dead ends: 103 [2020-09-11 12:08:22,339 INFO L226 Difference]: Without dead ends: 97 [2020-09-11 12:08:22,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-09-11 12:08:22,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-11 12:08:22,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-09-11 12:08:22,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 12:08:22,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 12:08:22,341 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-11 12:08:22,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:22,342 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 12:08:22,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 12:08:22,342 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 12:08:22,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 12:08:22,342 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:22,342 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:22,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-09-11 12:08:22,546 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:22,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:22,547 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-09-11 12:08:22,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:22,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376593987] [2020-09-11 12:08:22,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:22,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:22,777 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:22,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376593987] [2020-09-11 12:08:22,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935362775] [2020-09-11 12:08:22,778 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:22,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:22,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 12:08:22,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:22,856 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:22,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:22,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 12:08:22,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791472102] [2020-09-11 12:08:22,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 12:08:22,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:22,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 12:08:22,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:08:22,858 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-11 12:08:23,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:23,535 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-09-11 12:08:23,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 12:08:23,535 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 12:08:23,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:23,536 INFO L225 Difference]: With dead ends: 100 [2020-09-11 12:08:23,537 INFO L226 Difference]: Without dead ends: 94 [2020-09-11 12:08:23,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-09-11 12:08:23,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-11 12:08:23,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-09-11 12:08:23,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 12:08:23,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 12:08:23,540 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-11 12:08:23,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:23,540 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 12:08:23,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 12:08:23,540 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 12:08:23,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 12:08:23,541 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:23,541 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:23,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:23,744 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:23,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:23,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-09-11 12:08:23,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:23,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76208603] [2020-09-11 12:08:23,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:23,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:23,989 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:23,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76208603] [2020-09-11 12:08:23,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633675933] [2020-09-11 12:08:23,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:24,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:08:24,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:24,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 12:08:24,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:24,082 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:24,097 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:24,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:24,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 12:08:24,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328221749] [2020-09-11 12:08:24,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 12:08:24,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:24,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 12:08:24,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:08:24,098 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-11 12:08:24,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:24,968 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-09-11 12:08:24,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 12:08:24,969 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 12:08:24,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:24,970 INFO L225 Difference]: With dead ends: 99 [2020-09-11 12:08:24,970 INFO L226 Difference]: Without dead ends: 93 [2020-09-11 12:08:24,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 12:08:24,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-11 12:08:24,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-09-11 12:08:24,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 12:08:24,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 12:08:24,973 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-11 12:08:24,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:24,973 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 12:08:24,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 12:08:24,973 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 12:08:24,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 12:08:24,973 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:24,973 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:25,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-09-11 12:08:25,174 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:25,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:25,175 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-09-11 12:08:25,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:25,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933830651] [2020-09-11 12:08:25,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:25,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:25,402 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:25,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933830651] [2020-09-11 12:08:25,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720478371] [2020-09-11 12:08:25,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:25,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-11 12:08:25,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:25,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 12:08:25,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:25,486 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:25,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:25,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 12:08:25,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421434704] [2020-09-11 12:08:25,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 12:08:25,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:25,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 12:08:25,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:08:25,488 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-11 12:08:26,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:26,217 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-09-11 12:08:26,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 12:08:26,218 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 12:08:26,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:26,218 INFO L225 Difference]: With dead ends: 96 [2020-09-11 12:08:26,218 INFO L226 Difference]: Without dead ends: 90 [2020-09-11 12:08:26,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-09-11 12:08:26,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-11 12:08:26,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-09-11 12:08:26,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 12:08:26,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 12:08:26,222 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-11 12:08:26,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:26,222 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 12:08:26,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 12:08:26,222 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 12:08:26,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 12:08:26,223 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:26,223 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:26,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:26,426 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:26,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:26,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-09-11 12:08:26,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:26,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992827802] [2020-09-11 12:08:26,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:26,646 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:26,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992827802] [2020-09-11 12:08:26,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008990703] [2020-09-11 12:08:26,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:26,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:08:26,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:26,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 12:08:26,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:26,748 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:26,767 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:26,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:26,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 12:08:26,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385741328] [2020-09-11 12:08:26,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 12:08:26,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:26,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 12:08:26,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:08:26,769 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-11 12:08:27,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:27,732 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-09-11 12:08:27,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 12:08:27,733 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 12:08:27,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:27,733 INFO L225 Difference]: With dead ends: 95 [2020-09-11 12:08:27,733 INFO L226 Difference]: Without dead ends: 89 [2020-09-11 12:08:27,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-09-11 12:08:27,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-11 12:08:27,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-09-11 12:08:27,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 12:08:27,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 12:08:27,736 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-11 12:08:27,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:27,736 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 12:08:27,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 12:08:27,737 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 12:08:27,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 12:08:27,737 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:27,737 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:27,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:27,938 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:27,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:27,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-09-11 12:08:27,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:27,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620190245] [2020-09-11 12:08:27,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:27,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:28,137 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:28,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620190245] [2020-09-11 12:08:28,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244786256] [2020-09-11 12:08:28,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:28,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-11 12:08:28,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:28,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 12:08:28,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:28,220 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:28,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:28,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 12:08:28,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246481020] [2020-09-11 12:08:28,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 12:08:28,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:28,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 12:08:28,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:08:28,221 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-11 12:08:29,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:29,041 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-09-11 12:08:29,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 12:08:29,042 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 12:08:29,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:29,043 INFO L225 Difference]: With dead ends: 92 [2020-09-11 12:08:29,043 INFO L226 Difference]: Without dead ends: 86 [2020-09-11 12:08:29,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 12:08:29,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-11 12:08:29,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-09-11 12:08:29,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 12:08:29,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 12:08:29,045 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-11 12:08:29,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:29,045 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 12:08:29,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 12:08:29,045 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 12:08:29,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 12:08:29,045 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:29,045 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:29,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:29,246 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:29,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:29,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-09-11 12:08:29,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:29,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53857121] [2020-09-11 12:08:29,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:29,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:29,454 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:29,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53857121] [2020-09-11 12:08:29,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183551159] [2020-09-11 12:08:29,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:29,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-11 12:08:29,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:29,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 12:08:29,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:29,548 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:29,566 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:29,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:29,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 12:08:29,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933774362] [2020-09-11 12:08:29,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 12:08:29,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:29,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 12:08:29,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:08:29,567 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-11 12:08:30,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:30,627 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-09-11 12:08:30,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 12:08:30,628 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 12:08:30,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:30,629 INFO L225 Difference]: With dead ends: 91 [2020-09-11 12:08:30,629 INFO L226 Difference]: Without dead ends: 85 [2020-09-11 12:08:30,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-09-11 12:08:30,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-11 12:08:30,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-09-11 12:08:30,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 12:08:30,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 12:08:30,633 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-11 12:08:30,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:30,633 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 12:08:30,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 12:08:30,634 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 12:08:30,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 12:08:30,634 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:30,634 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:30,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:30,844 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:30,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:30,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-09-11 12:08:30,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:30,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138638641] [2020-09-11 12:08:30,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:30,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:31,084 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:31,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138638641] [2020-09-11 12:08:31,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476800442] [2020-09-11 12:08:31,085 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:31,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:31,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 12:08:31,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:31,171 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:31,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:31,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 12:08:31,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477216353] [2020-09-11 12:08:31,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 12:08:31,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:31,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 12:08:31,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:08:31,173 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-11 12:08:31,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:31,984 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-09-11 12:08:31,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 12:08:31,985 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 12:08:31,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:31,986 INFO L225 Difference]: With dead ends: 107 [2020-09-11 12:08:31,986 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 12:08:31,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 12:08:31,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 12:08:31,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-09-11 12:08:31,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-11 12:08:31,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-09-11 12:08:31,989 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-09-11 12:08:31,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:31,989 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-09-11 12:08:31,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 12:08:31,989 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-09-11 12:08:31,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 12:08:31,989 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:31,990 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:32,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-09-11 12:08:32,190 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:32,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:32,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-09-11 12:08:32,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:32,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839493228] [2020-09-11 12:08:32,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:32,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:32,412 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:32,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839493228] [2020-09-11 12:08:32,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229320311] [2020-09-11 12:08:32,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:32,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:08:32,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:32,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 12:08:32,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:32,500 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:32,517 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:32,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:32,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 12:08:32,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415390276] [2020-09-11 12:08:32,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 12:08:32,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:32,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 12:08:32,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:08:32,519 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-09-11 12:08:33,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:33,655 INFO L93 Difference]: Finished difference Result 88 states and 217 transitions. [2020-09-11 12:08:33,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-11 12:08:33,656 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 12:08:33,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:33,657 INFO L225 Difference]: With dead ends: 88 [2020-09-11 12:08:33,657 INFO L226 Difference]: Without dead ends: 80 [2020-09-11 12:08:33,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-09-11 12:08:33,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-11 12:08:33,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-09-11 12:08:33,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 12:08:33,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-09-11 12:08:33,658 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-09-11 12:08:33,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:33,659 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-09-11 12:08:33,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 12:08:33,659 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-09-11 12:08:33,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 12:08:33,659 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:33,659 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:33,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-09-11 12:08:33,860 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:33,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:33,860 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-09-11 12:08:33,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:33,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001105062] [2020-09-11 12:08:33,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:33,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:34,087 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:34,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001105062] [2020-09-11 12:08:34,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719219410] [2020-09-11 12:08:34,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:34,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-11 12:08:34,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:34,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 12:08:34,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:34,180 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:08:34,200 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:34,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:34,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 12:08:34,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256301470] [2020-09-11 12:08:34,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 12:08:34,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:34,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 12:08:34,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:08:34,202 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-09-11 12:08:35,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:35,241 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-09-11 12:08:35,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 12:08:35,242 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 12:08:35,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:35,243 INFO L225 Difference]: With dead ends: 100 [2020-09-11 12:08:35,243 INFO L226 Difference]: Without dead ends: 95 [2020-09-11 12:08:35,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-09-11 12:08:35,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-11 12:08:35,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-09-11 12:08:35,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-11 12:08:35,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-09-11 12:08:35,246 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-09-11 12:08:35,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:35,246 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-09-11 12:08:35,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 12:08:35,246 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-09-11 12:08:35,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 12:08:35,246 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:35,246 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:35,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-09-11 12:08:35,447 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:35,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:35,448 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-09-11 12:08:35,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:35,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008577373] [2020-09-11 12:08:35,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:35,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:35,693 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:35,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008577373] [2020-09-11 12:08:35,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044541912] [2020-09-11 12:08:35,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:35,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:08:35,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:35,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 12:08:35,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:35,784 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:08:35,806 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:35,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:35,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 12:08:35,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272045917] [2020-09-11 12:08:35,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 12:08:35,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:35,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 12:08:35,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:08:35,808 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-09-11 12:08:36,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:36,937 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-09-11 12:08:36,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 12:08:36,938 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 12:08:36,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:36,939 INFO L225 Difference]: With dead ends: 84 [2020-09-11 12:08:36,939 INFO L226 Difference]: Without dead ends: 79 [2020-09-11 12:08:36,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-09-11 12:08:36,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-11 12:08:36,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-09-11 12:08:36,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 12:08:36,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-09-11 12:08:36,941 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-09-11 12:08:36,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:36,942 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-09-11 12:08:36,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 12:08:36,942 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-09-11 12:08:36,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 12:08:36,942 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:36,942 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:37,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-09-11 12:08:37,143 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:37,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:37,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-09-11 12:08:37,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:37,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027369309] [2020-09-11 12:08:37,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:37,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:37,461 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:37,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027369309] [2020-09-11 12:08:37,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24218042] [2020-09-11 12:08:37,462 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:37,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 12:08:37,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:37,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 12:08:37,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:37,543 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:37,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:37,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 12:08:37,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452557152] [2020-09-11 12:08:37,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 12:08:37,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:37,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 12:08:37,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:08:37,545 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-09-11 12:08:38,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:38,037 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-09-11 12:08:38,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:08:38,044 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 12:08:38,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:38,044 INFO L225 Difference]: With dead ends: 90 [2020-09-11 12:08:38,044 INFO L226 Difference]: Without dead ends: 84 [2020-09-11 12:08:38,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 12:08:38,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-11 12:08:38,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-09-11 12:08:38,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 12:08:38,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-09-11 12:08:38,046 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-09-11 12:08:38,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:38,046 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-09-11 12:08:38,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 12:08:38,046 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-09-11 12:08:38,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 12:08:38,047 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:38,047 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:38,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:38,249 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:38,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:38,250 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-09-11 12:08:38,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:38,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228875676] [2020-09-11 12:08:38,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:38,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:38,566 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:38,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228875676] [2020-09-11 12:08:38,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149181885] [2020-09-11 12:08:38,567 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:38,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-11 12:08:38,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:38,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 12:08:38,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:38,662 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:38,673 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:38,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:38,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 12:08:38,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724782773] [2020-09-11 12:08:38,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 12:08:38,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:38,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 12:08:38,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:08:38,675 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-09-11 12:08:39,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:39,178 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-09-11 12:08:39,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:08:39,179 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 12:08:39,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:39,180 INFO L225 Difference]: With dead ends: 106 [2020-09-11 12:08:39,180 INFO L226 Difference]: Without dead ends: 100 [2020-09-11 12:08:39,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 12:08:39,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-11 12:08:39,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-09-11 12:08:39,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 12:08:39,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-09-11 12:08:39,183 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-09-11 12:08:39,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:39,183 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-09-11 12:08:39,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 12:08:39,183 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-09-11 12:08:39,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 12:08:39,184 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:39,184 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:39,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-09-11 12:08:39,387 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:39,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:39,387 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-09-11 12:08:39,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:39,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675889068] [2020-09-11 12:08:39,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:39,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:39,695 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:39,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675889068] [2020-09-11 12:08:39,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405006640] [2020-09-11 12:08:39,695 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:39,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:39,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 12:08:39,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:39,770 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:39,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:39,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 12:08:39,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544697109] [2020-09-11 12:08:39,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 12:08:39,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:39,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 12:08:39,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:08:39,772 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-09-11 12:08:40,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:40,345 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-09-11 12:08:40,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 12:08:40,346 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 12:08:40,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:40,347 INFO L225 Difference]: With dead ends: 107 [2020-09-11 12:08:40,347 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 12:08:40,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-09-11 12:08:40,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 12:08:40,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-09-11 12:08:40,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-11 12:08:40,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-09-11 12:08:40,351 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-09-11 12:08:40,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:40,351 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-09-11 12:08:40,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 12:08:40,351 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-09-11 12:08:40,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 12:08:40,351 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:40,352 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:40,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-09-11 12:08:40,552 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:40,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:40,553 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-09-11 12:08:40,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:40,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236567312] [2020-09-11 12:08:40,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:40,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:40,861 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:40,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236567312] [2020-09-11 12:08:40,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91067582] [2020-09-11 12:08:40,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:40,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:08:40,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:40,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 12:08:40,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:40,952 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:40,965 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:40,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:40,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 12:08:40,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445918635] [2020-09-11 12:08:40,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 12:08:40,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:40,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 12:08:40,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:08:40,966 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-09-11 12:08:41,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:41,612 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-09-11 12:08:41,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 12:08:41,613 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 12:08:41,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:41,613 INFO L225 Difference]: With dead ends: 119 [2020-09-11 12:08:41,613 INFO L226 Difference]: Without dead ends: 113 [2020-09-11 12:08:41,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-09-11 12:08:41,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-11 12:08:41,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-09-11 12:08:41,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 12:08:41,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-09-11 12:08:41,616 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-09-11 12:08:41,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:41,616 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-09-11 12:08:41,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 12:08:41,616 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-09-11 12:08:41,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 12:08:41,616 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:41,617 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:41,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-09-11 12:08:41,817 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:41,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:41,818 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-09-11 12:08:41,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:41,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038511084] [2020-09-11 12:08:41,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:41,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:42,106 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:42,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038511084] [2020-09-11 12:08:42,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808675315] [2020-09-11 12:08:42,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:42,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-11 12:08:42,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:42,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 12:08:42,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:42,188 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:42,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:42,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 12:08:42,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778555307] [2020-09-11 12:08:42,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 12:08:42,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:42,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 12:08:42,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:08:42,194 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-09-11 12:08:42,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:42,848 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-09-11 12:08:42,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 12:08:42,849 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 12:08:42,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:42,849 INFO L225 Difference]: With dead ends: 119 [2020-09-11 12:08:42,850 INFO L226 Difference]: Without dead ends: 113 [2020-09-11 12:08:42,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-09-11 12:08:42,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-11 12:08:42,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-09-11 12:08:42,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 12:08:42,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-09-11 12:08:42,853 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-09-11 12:08:42,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:42,853 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-09-11 12:08:42,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 12:08:42,853 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-09-11 12:08:42,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 12:08:42,854 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:42,854 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:43,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:43,062 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:43,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:43,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-09-11 12:08:43,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:43,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496579075] [2020-09-11 12:08:43,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:43,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:43,337 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:43,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496579075] [2020-09-11 12:08:43,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586405304] [2020-09-11 12:08:43,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:43,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:08:43,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:43,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 12:08:43,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:43,430 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:43,448 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:43,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:43,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 12:08:43,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175282810] [2020-09-11 12:08:43,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 12:08:43,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:43,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 12:08:43,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:08:43,450 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-09-11 12:08:44,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:44,204 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-09-11 12:08:44,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 12:08:44,205 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 12:08:44,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:44,206 INFO L225 Difference]: With dead ends: 116 [2020-09-11 12:08:44,206 INFO L226 Difference]: Without dead ends: 110 [2020-09-11 12:08:44,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-09-11 12:08:44,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-11 12:08:44,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-09-11 12:08:44,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 12:08:44,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-09-11 12:08:44,209 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-09-11 12:08:44,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:44,209 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-09-11 12:08:44,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 12:08:44,209 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-09-11 12:08:44,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 12:08:44,210 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:44,210 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:44,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:44,411 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:44,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:44,412 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-09-11 12:08:44,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:44,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635956375] [2020-09-11 12:08:44,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:44,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:44,674 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:44,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635956375] [2020-09-11 12:08:44,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452400152] [2020-09-11 12:08:44,674 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:44,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 12:08:44,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:44,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 12:08:44,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:44,789 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:44,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:44,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 12:08:44,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295555661] [2020-09-11 12:08:44,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 12:08:44,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:44,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 12:08:44,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:08:44,792 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-09-11 12:08:45,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:45,455 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-09-11 12:08:45,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 12:08:45,461 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 12:08:45,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:45,461 INFO L225 Difference]: With dead ends: 117 [2020-09-11 12:08:45,461 INFO L226 Difference]: Without dead ends: 111 [2020-09-11 12:08:45,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 12:08:45,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-11 12:08:45,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-09-11 12:08:45,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-11 12:08:45,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-09-11 12:08:45,464 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-09-11 12:08:45,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:45,464 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-09-11 12:08:45,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 12:08:45,464 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-09-11 12:08:45,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 12:08:45,465 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:45,465 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:45,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:45,668 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:45,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:45,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-09-11 12:08:45,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:45,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922386133] [2020-09-11 12:08:45,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:45,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:45,945 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:45,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922386133] [2020-09-11 12:08:45,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973717281] [2020-09-11 12:08:45,946 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:46,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-11 12:08:46,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:46,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 12:08:46,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:46,044 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:46,057 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:46,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:46,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 12:08:46,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672695907] [2020-09-11 12:08:46,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 12:08:46,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:46,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 12:08:46,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:08:46,059 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-09-11 12:08:46,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:46,898 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-09-11 12:08:46,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 12:08:46,899 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 12:08:46,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:46,900 INFO L225 Difference]: With dead ends: 114 [2020-09-11 12:08:46,900 INFO L226 Difference]: Without dead ends: 108 [2020-09-11 12:08:46,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 12:08:46,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-11 12:08:46,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-09-11 12:08:46,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 12:08:46,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-09-11 12:08:46,906 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-09-11 12:08:46,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:46,907 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-09-11 12:08:46,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 12:08:46,907 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-09-11 12:08:46,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 12:08:46,908 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:46,908 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:47,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-09-11 12:08:47,124 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:47,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:47,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-09-11 12:08:47,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:47,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800643966] [2020-09-11 12:08:47,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:47,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:47,371 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:47,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800643966] [2020-09-11 12:08:47,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506675279] [2020-09-11 12:08:47,372 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:47,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:47,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 12:08:47,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:47,456 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:47,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:47,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 12:08:47,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221446672] [2020-09-11 12:08:47,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 12:08:47,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:47,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 12:08:47,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:08:47,457 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-09-11 12:08:48,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:48,264 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-09-11 12:08:48,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 12:08:48,265 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 12:08:48,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:48,265 INFO L225 Difference]: With dead ends: 115 [2020-09-11 12:08:48,266 INFO L226 Difference]: Without dead ends: 109 [2020-09-11 12:08:48,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-09-11 12:08:48,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-11 12:08:48,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-09-11 12:08:48,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-11 12:08:48,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-09-11 12:08:48,271 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-09-11 12:08:48,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:48,271 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-09-11 12:08:48,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 12:08:48,271 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-09-11 12:08:48,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 12:08:48,272 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:48,272 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:48,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:48,480 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:48,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:48,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-09-11 12:08:48,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:48,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500212302] [2020-09-11 12:08:48,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:48,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:48,749 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:48,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500212302] [2020-09-11 12:08:48,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233033191] [2020-09-11 12:08:48,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:48,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:08:48,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:48,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 12:08:48,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:48,838 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:48,853 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:48,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:48,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 12:08:48,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418960186] [2020-09-11 12:08:48,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 12:08:48,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:48,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 12:08:48,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:08:48,855 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-09-11 12:08:49,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:49,830 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-09-11 12:08:49,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 12:08:49,831 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 12:08:49,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:49,831 INFO L225 Difference]: With dead ends: 112 [2020-09-11 12:08:49,831 INFO L226 Difference]: Without dead ends: 106 [2020-09-11 12:08:49,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 12:08:49,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-11 12:08:49,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-09-11 12:08:49,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-11 12:08:49,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-09-11 12:08:49,835 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-09-11 12:08:49,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:49,836 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-09-11 12:08:49,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 12:08:49,836 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-09-11 12:08:49,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 12:08:49,836 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:49,836 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:50,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-09-11 12:08:50,045 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:50,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:50,046 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-09-11 12:08:50,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:50,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007521017] [2020-09-11 12:08:50,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:50,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:50,302 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:50,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007521017] [2020-09-11 12:08:50,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835987115] [2020-09-11 12:08:50,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:50,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-11 12:08:50,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:50,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 12:08:50,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:50,388 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:50,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:50,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 12:08:50,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379200367] [2020-09-11 12:08:50,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 12:08:50,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:50,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 12:08:50,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:08:50,390 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-09-11 12:08:51,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:51,246 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-09-11 12:08:51,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 12:08:51,247 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 12:08:51,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:51,248 INFO L225 Difference]: With dead ends: 113 [2020-09-11 12:08:51,248 INFO L226 Difference]: Without dead ends: 107 [2020-09-11 12:08:51,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-09-11 12:08:51,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-11 12:08:51,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-09-11 12:08:51,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 12:08:51,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 12:08:51,251 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-09-11 12:08:51,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:51,251 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 12:08:51,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 12:08:51,251 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 12:08:51,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 12:08:51,251 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:51,252 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:51,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-09-11 12:08:51,452 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:51,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:51,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-09-11 12:08:51,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:51,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323629171] [2020-09-11 12:08:51,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:51,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:51,716 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:51,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323629171] [2020-09-11 12:08:51,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252948600] [2020-09-11 12:08:51,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:51,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:08:51,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:51,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 12:08:51,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:51,807 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:51,824 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:51,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:51,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 12:08:51,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169937142] [2020-09-11 12:08:51,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 12:08:51,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:51,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 12:08:51,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:08:51,825 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-09-11 12:08:52,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:52,879 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-09-11 12:08:52,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 12:08:52,880 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 12:08:52,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:52,881 INFO L225 Difference]: With dead ends: 110 [2020-09-11 12:08:52,881 INFO L226 Difference]: Without dead ends: 104 [2020-09-11 12:08:52,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-09-11 12:08:52,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-11 12:08:52,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-09-11 12:08:52,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 12:08:52,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 12:08:52,884 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-09-11 12:08:52,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:52,884 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 12:08:52,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 12:08:52,884 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 12:08:52,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 12:08:52,885 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:52,885 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:53,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-09-11 12:08:53,086 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:53,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:53,086 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-09-11 12:08:53,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:53,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274262587] [2020-09-11 12:08:53,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:53,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:53,352 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:53,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274262587] [2020-09-11 12:08:53,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892467967] [2020-09-11 12:08:53,353 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:53,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 12:08:53,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:53,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 12:08:53,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:53,451 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:53,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:53,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 12:08:53,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607822017] [2020-09-11 12:08:53,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 12:08:53,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:53,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 12:08:53,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:08:53,453 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-09-11 12:08:54,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:54,387 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-09-11 12:08:54,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-11 12:08:54,387 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 12:08:54,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:54,388 INFO L225 Difference]: With dead ends: 111 [2020-09-11 12:08:54,388 INFO L226 Difference]: Without dead ends: 105 [2020-09-11 12:08:54,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-09-11 12:08:54,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-11 12:08:54,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-09-11 12:08:54,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-11 12:08:54,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-09-11 12:08:54,391 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-09-11 12:08:54,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:54,392 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-09-11 12:08:54,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 12:08:54,392 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-09-11 12:08:54,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 12:08:54,392 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:54,392 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:54,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:54,593 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:54,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:54,594 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-09-11 12:08:54,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:54,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550817095] [2020-09-11 12:08:54,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:54,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:54,853 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:54,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550817095] [2020-09-11 12:08:54,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613836830] [2020-09-11 12:08:54,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:54,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-11 12:08:54,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:54,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 12:08:54,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:54,950 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:54,968 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:54,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:54,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 12:08:54,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576414485] [2020-09-11 12:08:54,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 12:08:54,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:54,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 12:08:54,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:08:54,970 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-09-11 12:08:56,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:56,117 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-09-11 12:08:56,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-11 12:08:56,118 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 12:08:56,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:56,119 INFO L225 Difference]: With dead ends: 108 [2020-09-11 12:08:56,119 INFO L226 Difference]: Without dead ends: 102 [2020-09-11 12:08:56,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=694, Invalid=1658, Unknown=0, NotChecked=0, Total=2352 [2020-09-11 12:08:56,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-11 12:08:56,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-09-11 12:08:56,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-11 12:08:56,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-09-11 12:08:56,121 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-09-11 12:08:56,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:56,122 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-09-11 12:08:56,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 12:08:56,122 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-09-11 12:08:56,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 12:08:56,122 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:56,122 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:56,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-09-11 12:08:56,323 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:56,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:56,323 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-09-11 12:08:56,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:56,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584351979] [2020-09-11 12:08:56,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:56,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:56,573 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:56,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584351979] [2020-09-11 12:08:56,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797533042] [2020-09-11 12:08:56,574 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:56,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:56,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 12:08:56,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:56,659 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:56,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:56,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 12:08:56,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856006812] [2020-09-11 12:08:56,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 12:08:56,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:56,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 12:08:56,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:08:56,661 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-09-11 12:08:57,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:57,665 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-09-11 12:08:57,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 12:08:57,666 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 12:08:57,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:57,667 INFO L225 Difference]: With dead ends: 128 [2020-09-11 12:08:57,667 INFO L226 Difference]: Without dead ends: 122 [2020-09-11 12:08:57,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-09-11 12:08:57,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-11 12:08:57,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-09-11 12:08:57,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-11 12:08:57,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-09-11 12:08:57,669 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-09-11 12:08:57,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:57,669 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-09-11 12:08:57,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 12:08:57,669 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-09-11 12:08:57,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 12:08:57,669 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:57,670 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:57,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:57,870 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:57,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:57,871 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-09-11 12:08:57,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:57,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922137504] [2020-09-11 12:08:57,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:57,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:58,124 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:58,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922137504] [2020-09-11 12:08:58,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202280059] [2020-09-11 12:08:58,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:08:58,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:08:58,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:58,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 12:08:58,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:58,215 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:58,233 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:58,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:58,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 12:08:58,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800059759] [2020-09-11 12:08:58,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 12:08:58,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:58,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 12:08:58,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:08:58,236 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-09-11 12:08:59,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:59,438 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-09-11 12:08:59,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-11 12:08:59,439 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 12:08:59,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:59,439 INFO L225 Difference]: With dead ends: 109 [2020-09-11 12:08:59,439 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 12:08:59,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-09-11 12:08:59,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 12:08:59,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-09-11 12:08:59,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-11 12:08:59,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-09-11 12:08:59,441 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-09-11 12:08:59,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:59,441 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-09-11 12:08:59,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 12:08:59,441 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-09-11 12:08:59,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 12:08:59,442 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:59,442 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:59,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:59,643 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:59,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:59,643 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-09-11 12:08:59,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:59,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642727724] [2020-09-11 12:08:59,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:59,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:59,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642727724] [2020-09-11 12:08:59,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582732359] [2020-09-11 12:08:59,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:09:00,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-11 12:09:00,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:00,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 12:09:00,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:00,055 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:00,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:00,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 12:09:00,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564302843] [2020-09-11 12:09:00,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 12:09:00,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:00,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 12:09:00,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:09:00,057 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-09-11 12:09:00,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:00,616 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-09-11 12:09:00,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 12:09:00,617 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 12:09:00,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:00,618 INFO L225 Difference]: With dead ends: 124 [2020-09-11 12:09:00,618 INFO L226 Difference]: Without dead ends: 118 [2020-09-11 12:09:00,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-09-11 12:09:00,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-11 12:09:00,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-09-11 12:09:00,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 12:09:00,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 12:09:00,621 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 12:09:00,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:00,621 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 12:09:00,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 12:09:00,621 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 12:09:00,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 12:09:00,622 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:00,622 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:00,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:00,830 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:00,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:00,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-09-11 12:09:00,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:00,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581761808] [2020-09-11 12:09:00,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:00,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:01,191 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:01,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581761808] [2020-09-11 12:09:01,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414524487] [2020-09-11 12:09:01,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:09:01,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:09:01,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:01,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 12:09:01,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:01,281 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:09:01,295 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:01,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:01,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 12:09:01,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262120379] [2020-09-11 12:09:01,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 12:09:01,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:01,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 12:09:01,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:09:01,297 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 12:09:01,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:01,983 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-09-11 12:09:01,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 12:09:01,984 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 12:09:01,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:01,984 INFO L225 Difference]: With dead ends: 121 [2020-09-11 12:09:01,984 INFO L226 Difference]: Without dead ends: 115 [2020-09-11 12:09:01,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-09-11 12:09:01,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-11 12:09:01,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-09-11 12:09:01,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 12:09:01,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 12:09:01,987 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 12:09:01,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:01,987 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 12:09:01,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 12:09:01,987 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 12:09:01,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 12:09:01,988 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:01,988 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:02,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:02,189 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:02,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:02,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-09-11 12:09:02,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:02,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444251305] [2020-09-11 12:09:02,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:02,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:02,521 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:02,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444251305] [2020-09-11 12:09:02,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230531145] [2020-09-11 12:09:02,522 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:09:02,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 12:09:02,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:02,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 12:09:02,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:02,603 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:02,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:02,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 12:09:02,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094739279] [2020-09-11 12:09:02,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 12:09:02,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:02,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 12:09:02,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:09:02,604 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 12:09:03,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:03,265 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-09-11 12:09:03,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 12:09:03,266 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 12:09:03,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:03,266 INFO L225 Difference]: With dead ends: 118 [2020-09-11 12:09:03,266 INFO L226 Difference]: Without dead ends: 112 [2020-09-11 12:09:03,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-09-11 12:09:03,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-11 12:09:03,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-09-11 12:09:03,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 12:09:03,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 12:09:03,269 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 12:09:03,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:03,270 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 12:09:03,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 12:09:03,270 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 12:09:03,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 12:09:03,270 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:03,270 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:03,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:03,471 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:03,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:03,472 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-09-11 12:09:03,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:03,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865778136] [2020-09-11 12:09:03,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:03,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:03,810 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:03,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865778136] [2020-09-11 12:09:03,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862313119] [2020-09-11 12:09:03,811 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:09:03,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-11 12:09:03,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:03,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 12:09:03,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:03,908 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:09:03,922 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:03,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:03,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 12:09:03,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097034800] [2020-09-11 12:09:03,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 12:09:03,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:03,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 12:09:03,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:09:03,923 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 12:09:04,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:04,737 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-09-11 12:09:04,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 12:09:04,738 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 12:09:04,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:04,739 INFO L225 Difference]: With dead ends: 117 [2020-09-11 12:09:04,739 INFO L226 Difference]: Without dead ends: 111 [2020-09-11 12:09:04,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 12:09:04,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-11 12:09:04,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-09-11 12:09:04,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 12:09:04,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 12:09:04,742 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 12:09:04,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:04,742 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 12:09:04,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 12:09:04,742 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 12:09:04,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 12:09:04,743 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:04,743 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:04,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-09-11 12:09:04,944 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:04,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:04,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-09-11 12:09:04,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:04,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295745411] [2020-09-11 12:09:04,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:04,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:05,260 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:05,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295745411] [2020-09-11 12:09:05,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960438354] [2020-09-11 12:09:05,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:09:05,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:05,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 12:09:05,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:05,338 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:05,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:05,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 12:09:05,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865261822] [2020-09-11 12:09:05,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 12:09:05,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:05,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 12:09:05,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:09:05,340 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 12:09:06,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:06,055 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-09-11 12:09:06,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 12:09:06,056 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 12:09:06,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:06,057 INFO L225 Difference]: With dead ends: 114 [2020-09-11 12:09:06,057 INFO L226 Difference]: Without dead ends: 108 [2020-09-11 12:09:06,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-09-11 12:09:06,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-11 12:09:06,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-09-11 12:09:06,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 12:09:06,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 12:09:06,059 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 12:09:06,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:06,059 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 12:09:06,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 12:09:06,059 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 12:09:06,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 12:09:06,060 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:06,060 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:06,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-09-11 12:09:06,264 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:06,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:06,265 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-09-11 12:09:06,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:06,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946051994] [2020-09-11 12:09:06,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:06,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:06,583 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:06,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946051994] [2020-09-11 12:09:06,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642572484] [2020-09-11 12:09:06,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:09:06,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:09:06,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:06,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 12:09:06,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:06,673 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:09:06,687 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:06,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:06,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 12:09:06,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842226898] [2020-09-11 12:09:06,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 12:09:06,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:06,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 12:09:06,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:09:06,688 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 12:09:07,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:07,606 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-09-11 12:09:07,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 12:09:07,607 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 12:09:07,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:07,607 INFO L225 Difference]: With dead ends: 113 [2020-09-11 12:09:07,607 INFO L226 Difference]: Without dead ends: 107 [2020-09-11 12:09:07,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-09-11 12:09:07,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-11 12:09:07,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-09-11 12:09:07,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 12:09:07,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 12:09:07,610 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 12:09:07,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:07,611 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 12:09:07,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 12:09:07,611 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 12:09:07,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 12:09:07,611 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:07,611 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:07,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-09-11 12:09:07,820 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:07,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:07,821 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-09-11 12:09:07,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:07,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051362760] [2020-09-11 12:09:07,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:07,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:08,127 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:08,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051362760] [2020-09-11 12:09:08,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188703727] [2020-09-11 12:09:08,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:09:08,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-11 12:09:08,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:08,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 12:09:08,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:08,223 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:08,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:08,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 12:09:08,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505123534] [2020-09-11 12:09:08,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 12:09:08,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:08,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 12:09:08,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:09:08,224 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 12:09:09,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:09,035 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-09-11 12:09:09,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 12:09:09,036 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 12:09:09,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:09,036 INFO L225 Difference]: With dead ends: 110 [2020-09-11 12:09:09,037 INFO L226 Difference]: Without dead ends: 104 [2020-09-11 12:09:09,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 12:09:09,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-11 12:09:09,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-09-11 12:09:09,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 12:09:09,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 12:09:09,040 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 12:09:09,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:09,041 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 12:09:09,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 12:09:09,041 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 12:09:09,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 12:09:09,041 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:09,041 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:09,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-09-11 12:09:09,249 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:09,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:09,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-09-11 12:09:09,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:09,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597680654] [2020-09-11 12:09:09,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:09,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:09,562 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:09,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597680654] [2020-09-11 12:09:09,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775711549] [2020-09-11 12:09:09,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:09:09,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:09:09,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:09,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 12:09:09,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:09,655 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:09:09,672 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:09,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:09,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 12:09:09,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543940683] [2020-09-11 12:09:09,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 12:09:09,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:09,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 12:09:09,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:09:09,673 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 12:09:10,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:10,695 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-09-11 12:09:10,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 12:09:10,696 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 12:09:10,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:10,697 INFO L225 Difference]: With dead ends: 109 [2020-09-11 12:09:10,697 INFO L226 Difference]: Without dead ends: 103 [2020-09-11 12:09:10,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-09-11 12:09:10,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-11 12:09:10,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-09-11 12:09:10,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 12:09:10,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 12:09:10,700 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 12:09:10,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:10,701 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 12:09:10,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 12:09:10,701 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 12:09:10,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 12:09:10,701 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:10,701 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:10,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:10,902 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:10,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:10,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-09-11 12:09:10,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:10,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063287684] [2020-09-11 12:09:10,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:10,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:11,200 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:11,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063287684] [2020-09-11 12:09:11,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007159254] [2020-09-11 12:09:11,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:09:11,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 12:09:11,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:11,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 12:09:11,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:11,285 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:11,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:11,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 12:09:11,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35641055] [2020-09-11 12:09:11,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 12:09:11,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:11,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 12:09:11,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:09:11,286 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 12:09:12,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:12,189 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-09-11 12:09:12,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 12:09:12,190 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 12:09:12,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:12,190 INFO L225 Difference]: With dead ends: 106 [2020-09-11 12:09:12,190 INFO L226 Difference]: Without dead ends: 100 [2020-09-11 12:09:12,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 12:09:12,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-11 12:09:12,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-09-11 12:09:12,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 12:09:12,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 12:09:12,192 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 12:09:12,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:12,192 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 12:09:12,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 12:09:12,193 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 12:09:12,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 12:09:12,193 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:12,193 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:12,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-09-11 12:09:12,394 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:12,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:12,394 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-09-11 12:09:12,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:12,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148554022] [2020-09-11 12:09:12,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:12,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:12,690 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:12,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148554022] [2020-09-11 12:09:12,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580081216] [2020-09-11 12:09:12,691 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:09:12,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-11 12:09:12,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:12,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 12:09:12,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:12,787 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:09:12,805 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:12,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:12,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 12:09:12,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203281498] [2020-09-11 12:09:12,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 12:09:12,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:12,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 12:09:12,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:09:12,806 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 12:09:13,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:13,935 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-09-11 12:09:13,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 12:09:13,936 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 12:09:13,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:13,936 INFO L225 Difference]: With dead ends: 105 [2020-09-11 12:09:13,937 INFO L226 Difference]: Without dead ends: 99 [2020-09-11 12:09:13,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-09-11 12:09:13,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-11 12:09:13,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-09-11 12:09:13,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 12:09:13,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 12:09:13,939 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 12:09:13,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:13,939 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 12:09:13,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 12:09:13,940 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 12:09:13,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 12:09:13,940 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:13,940 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:14,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:14,141 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:14,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:14,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-09-11 12:09:14,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:14,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651884347] [2020-09-11 12:09:14,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:14,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:14,427 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:14,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651884347] [2020-09-11 12:09:14,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828587771] [2020-09-11 12:09:14,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:09:14,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:14,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 12:09:14,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:14,522 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:14,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:14,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 12:09:14,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090992148] [2020-09-11 12:09:14,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 12:09:14,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:14,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 12:09:14,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:09:14,524 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 12:09:15,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:15,484 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-09-11 12:09:15,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 12:09:15,485 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 12:09:15,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:15,486 INFO L225 Difference]: With dead ends: 102 [2020-09-11 12:09:15,486 INFO L226 Difference]: Without dead ends: 96 [2020-09-11 12:09:15,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-09-11 12:09:15,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-11 12:09:15,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-09-11 12:09:15,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 12:09:15,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 12:09:15,489 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 12:09:15,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:15,489 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 12:09:15,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 12:09:15,489 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 12:09:15,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 12:09:15,490 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:15,490 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:15,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:15,690 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:15,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:15,691 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-09-11 12:09:15,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:15,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237088374] [2020-09-11 12:09:15,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:15,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:15,980 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:15,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237088374] [2020-09-11 12:09:15,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204220818] [2020-09-11 12:09:15,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:09:16,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:09:16,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:16,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 12:09:16,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:16,074 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:09:16,090 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:16,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:16,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 12:09:16,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374166000] [2020-09-11 12:09:16,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 12:09:16,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:16,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 12:09:16,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:09:16,092 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 12:09:17,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:17,360 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-09-11 12:09:17,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-11 12:09:17,361 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 12:09:17,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:17,361 INFO L225 Difference]: With dead ends: 101 [2020-09-11 12:09:17,362 INFO L226 Difference]: Without dead ends: 95 [2020-09-11 12:09:17,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-09-11 12:09:17,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-11 12:09:17,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-09-11 12:09:17,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 12:09:17,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 12:09:17,364 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 12:09:17,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:17,364 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 12:09:17,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 12:09:17,364 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 12:09:17,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 12:09:17,365 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:17,365 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:17,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-09-11 12:09:17,567 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:17,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:17,567 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-09-11 12:09:17,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:17,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580294531] [2020-09-11 12:09:17,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:17,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:17,847 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:17,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580294531] [2020-09-11 12:09:17,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871676811] [2020-09-11 12:09:17,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:09:17,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-11 12:09:17,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:17,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 12:09:17,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:17,937 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:17,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:17,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 12:09:17,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426840455] [2020-09-11 12:09:17,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 12:09:17,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:17,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 12:09:17,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:09:17,938 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 12:09:18,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:18,977 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-09-11 12:09:18,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-11 12:09:18,978 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 12:09:18,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:18,978 INFO L225 Difference]: With dead ends: 98 [2020-09-11 12:09:18,979 INFO L226 Difference]: Without dead ends: 92 [2020-09-11 12:09:18,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-09-11 12:09:18,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-11 12:09:18,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-09-11 12:09:18,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 12:09:18,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 12:09:18,981 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 12:09:18,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:18,982 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 12:09:18,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 12:09:18,982 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 12:09:18,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 12:09:18,982 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:18,982 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:19,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:19,183 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:19,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:19,184 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-09-11 12:09:19,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:19,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724811123] [2020-09-11 12:09:19,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:19,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:19,462 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:19,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724811123] [2020-09-11 12:09:19,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521541061] [2020-09-11 12:09:19,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:09:19,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:09:19,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:19,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 12:09:19,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:19,553 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:09:19,573 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:19,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:19,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 12:09:19,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912831315] [2020-09-11 12:09:19,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 12:09:19,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:19,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 12:09:19,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:09:19,575 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 12:09:20,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:20,932 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-09-11 12:09:20,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-11 12:09:20,933 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 12:09:20,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:20,934 INFO L225 Difference]: With dead ends: 97 [2020-09-11 12:09:20,934 INFO L226 Difference]: Without dead ends: 91 [2020-09-11 12:09:20,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-09-11 12:09:20,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-11 12:09:20,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-09-11 12:09:20,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 12:09:20,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 12:09:20,936 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 12:09:20,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:20,937 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 12:09:20,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 12:09:20,937 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 12:09:20,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 12:09:20,937 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:20,937 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:21,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-09-11 12:09:21,138 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:21,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:21,138 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-09-11 12:09:21,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:21,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799843387] [2020-09-11 12:09:21,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:21,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:21,413 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:21,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799843387] [2020-09-11 12:09:21,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275408083] [2020-09-11 12:09:21,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:09:21,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 12:09:21,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:21,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 12:09:21,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:21,506 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:21,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:21,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 12:09:21,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317066012] [2020-09-11 12:09:21,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 12:09:21,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:21,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 12:09:21,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:09:21,508 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 12:09:22,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:22,621 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-09-11 12:09:22,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 12:09:22,622 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 12:09:22,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:22,623 INFO L225 Difference]: With dead ends: 113 [2020-09-11 12:09:22,623 INFO L226 Difference]: Without dead ends: 107 [2020-09-11 12:09:22,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-09-11 12:09:22,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-11 12:09:22,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-09-11 12:09:22,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-11 12:09:22,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-09-11 12:09:22,626 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-09-11 12:09:22,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:22,626 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-09-11 12:09:22,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 12:09:22,627 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-09-11 12:09:22,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 12:09:22,627 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:22,627 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:22,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-09-11 12:09:22,828 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:22,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:22,828 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-09-11 12:09:22,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:22,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156677380] [2020-09-11 12:09:22,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:22,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:23,106 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:23,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156677380] [2020-09-11 12:09:23,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003376508] [2020-09-11 12:09:23,106 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:09:23,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-11 12:09:23,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:23,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 12:09:23,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:23,201 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:09:23,221 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:23,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:23,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 12:09:23,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618513552] [2020-09-11 12:09:23,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 12:09:23,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:23,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 12:09:23,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:09:23,223 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-09-11 12:09:24,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:24,650 INFO L93 Difference]: Finished difference Result 94 states and 233 transitions. [2020-09-11 12:09:24,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-11 12:09:24,651 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 12:09:24,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:24,651 INFO L225 Difference]: With dead ends: 94 [2020-09-11 12:09:24,652 INFO L226 Difference]: Without dead ends: 86 [2020-09-11 12:09:24,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862 [2020-09-11 12:09:24,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-11 12:09:24,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2020-09-11 12:09:24,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-11 12:09:24,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-09-11 12:09:24,654 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-09-11 12:09:24,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:24,654 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-09-11 12:09:24,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 12:09:24,655 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-09-11 12:09:24,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 12:09:24,655 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:24,655 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:24,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-09-11 12:09:24,856 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:24,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:24,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-09-11 12:09:24,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:24,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061906164] [2020-09-11 12:09:24,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:24,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:25,133 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:25,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061906164] [2020-09-11 12:09:25,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155103944] [2020-09-11 12:09:25,133 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:09:25,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:25,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 12:09:25,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:25,228 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:09:25,252 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:25,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:25,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 12:09:25,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519863165] [2020-09-11 12:09:25,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 12:09:25,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:25,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 12:09:25,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:09:25,254 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-09-11 12:09:26,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:26,567 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-09-11 12:09:26,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 12:09:26,568 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 12:09:26,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:26,568 INFO L225 Difference]: With dead ends: 108 [2020-09-11 12:09:26,568 INFO L226 Difference]: Without dead ends: 103 [2020-09-11 12:09:26,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-09-11 12:09:26,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-11 12:09:26,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-09-11 12:09:26,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-11 12:09:26,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-09-11 12:09:26,570 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-09-11 12:09:26,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:26,570 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-09-11 12:09:26,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 12:09:26,571 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-09-11 12:09:26,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 12:09:26,571 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:26,571 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:26,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-09-11 12:09:26,772 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:26,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:26,772 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-09-11 12:09:26,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:26,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352547145] [2020-09-11 12:09:26,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:27,080 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:27,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352547145] [2020-09-11 12:09:27,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288170240] [2020-09-11 12:09:27,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:09:27,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:09:27,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:27,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 12:09:27,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:27,178 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:09:27,203 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:27,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:27,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 12:09:27,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794074610] [2020-09-11 12:09:27,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 12:09:27,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:27,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 12:09:27,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:09:27,205 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-09-11 12:09:28,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:28,601 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-09-11 12:09:28,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 12:09:28,602 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 12:09:28,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:28,603 INFO L225 Difference]: With dead ends: 90 [2020-09-11 12:09:28,603 INFO L226 Difference]: Without dead ends: 85 [2020-09-11 12:09:28,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-09-11 12:09:28,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-11 12:09:28,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-09-11 12:09:28,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 12:09:28,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-09-11 12:09:28,605 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-09-11 12:09:28,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:28,605 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-09-11 12:09:28,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 12:09:28,606 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-09-11 12:09:28,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 12:09:28,606 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:28,606 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:28,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:28,807 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:28,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:28,807 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-09-11 12:09:28,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:28,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693870460] [2020-09-11 12:09:28,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:28,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:29,198 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:29,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693870460] [2020-09-11 12:09:29,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321534182] [2020-09-11 12:09:29,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:09:29,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 12:09:29,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:29,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 12:09:29,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:29,278 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:29,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:29,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 12:09:29,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093928486] [2020-09-11 12:09:29,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 12:09:29,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:29,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 12:09:29,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:09:29,280 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-09-11 12:09:29,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:29,901 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-09-11 12:09:29,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 12:09:29,902 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 12:09:29,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:29,902 INFO L225 Difference]: With dead ends: 96 [2020-09-11 12:09:29,902 INFO L226 Difference]: Without dead ends: 90 [2020-09-11 12:09:29,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-09-11 12:09:29,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-11 12:09:29,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-09-11 12:09:29,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 12:09:29,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-09-11 12:09:29,904 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-09-11 12:09:29,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:29,904 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-09-11 12:09:29,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 12:09:29,904 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-09-11 12:09:29,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 12:09:29,905 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:29,905 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:30,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:30,106 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:30,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:30,106 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-09-11 12:09:30,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:30,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688073550] [2020-09-11 12:09:30,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:30,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:30,499 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:30,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688073550] [2020-09-11 12:09:30,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951983914] [2020-09-11 12:09:30,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:09:30,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:09:30,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:30,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 12:09:30,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:30,593 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:09:30,607 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:30,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:30,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 12:09:30,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932342684] [2020-09-11 12:09:30,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 12:09:30,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:30,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 12:09:30,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:09:30,609 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-09-11 12:09:31,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:31,238 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-09-11 12:09:31,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 12:09:31,239 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 12:09:31,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:31,240 INFO L225 Difference]: With dead ends: 114 [2020-09-11 12:09:31,240 INFO L226 Difference]: Without dead ends: 108 [2020-09-11 12:09:31,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-09-11 12:09:31,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-11 12:09:31,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-09-11 12:09:31,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 12:09:31,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-09-11 12:09:31,242 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-09-11 12:09:31,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:31,242 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-09-11 12:09:31,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 12:09:31,242 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-09-11 12:09:31,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 12:09:31,243 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:31,243 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:31,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:31,444 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:31,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:31,444 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-09-11 12:09:31,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:31,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41416764] [2020-09-11 12:09:31,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:31,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:31,824 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:31,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41416764] [2020-09-11 12:09:31,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829822406] [2020-09-11 12:09:31,825 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:09:31,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 12:09:31,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:31,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 12:09:31,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:31,907 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:31,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:31,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 12:09:31,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412057571] [2020-09-11 12:09:31,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 12:09:31,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:31,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 12:09:31,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:09:31,908 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-09-11 12:09:32,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:32,622 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-09-11 12:09:32,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 12:09:32,623 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 12:09:32,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:32,623 INFO L225 Difference]: With dead ends: 115 [2020-09-11 12:09:32,623 INFO L226 Difference]: Without dead ends: 109 [2020-09-11 12:09:32,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-09-11 12:09:32,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-11 12:09:32,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-09-11 12:09:32,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-11 12:09:32,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-09-11 12:09:32,625 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-09-11 12:09:32,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:32,626 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-09-11 12:09:32,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 12:09:32,626 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-09-11 12:09:32,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 12:09:32,626 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:32,626 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:32,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:32,827 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:32,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:32,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-09-11 12:09:32,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:32,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418869993] [2020-09-11 12:09:32,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:32,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:33,216 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:33,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418869993] [2020-09-11 12:09:33,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138513636] [2020-09-11 12:09:33,217 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:09:33,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 12:09:33,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:33,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 12:09:33,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:33,315 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:09:33,332 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:33,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:33,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 12:09:33,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663165416] [2020-09-11 12:09:33,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 12:09:33,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:33,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 12:09:33,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:09:33,333 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-09-11 12:09:34,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:34,093 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-09-11 12:09:34,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 12:09:34,094 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 12:09:34,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:34,095 INFO L225 Difference]: With dead ends: 129 [2020-09-11 12:09:34,095 INFO L226 Difference]: Without dead ends: 123 [2020-09-11 12:09:34,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 12:09:34,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-11 12:09:34,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-09-11 12:09:34,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 12:09:34,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-09-11 12:09:34,098 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-09-11 12:09:34,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:34,098 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-09-11 12:09:34,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 12:09:34,098 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-09-11 12:09:34,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 12:09:34,099 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:34,099 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:34,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:34,307 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:34,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:34,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-09-11 12:09:34,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:34,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755696422] [2020-09-11 12:09:34,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:34,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:34,672 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:34,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755696422] [2020-09-11 12:09:34,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471862317] [2020-09-11 12:09:34,673 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:09:34,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:34,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 12:09:34,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:34,751 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:34,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:34,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 12:09:34,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518766600] [2020-09-11 12:09:34,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 12:09:34,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:34,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 12:09:34,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:09:34,752 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-09-11 12:09:35,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:35,557 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-09-11 12:09:35,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 12:09:35,559 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 12:09:35,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:35,559 INFO L225 Difference]: With dead ends: 129 [2020-09-11 12:09:35,559 INFO L226 Difference]: Without dead ends: 123 [2020-09-11 12:09:35,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-09-11 12:09:35,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-11 12:09:35,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-09-11 12:09:35,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-11 12:09:35,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-09-11 12:09:35,562 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-09-11 12:09:35,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:35,562 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-09-11 12:09:35,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 12:09:35,563 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-09-11 12:09:35,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 12:09:35,563 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:35,563 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:35,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:35,764 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:35,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:35,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-09-11 12:09:35,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:35,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780880500] [2020-09-11 12:09:35,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:35,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:36,133 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:36,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780880500] [2020-09-11 12:09:36,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476646824] [2020-09-11 12:09:36,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:09:36,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:09:36,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:36,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 12:09:36,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:36,235 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:09:36,250 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:36,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:36,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 12:09:36,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699195260] [2020-09-11 12:09:36,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 12:09:36,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:36,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 12:09:36,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:09:36,252 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-09-11 12:09:37,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:37,165 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-09-11 12:09:37,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 12:09:37,166 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 12:09:37,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:37,167 INFO L225 Difference]: With dead ends: 126 [2020-09-11 12:09:37,167 INFO L226 Difference]: Without dead ends: 120 [2020-09-11 12:09:37,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 12:09:37,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-11 12:09:37,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-09-11 12:09:37,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-11 12:09:37,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-09-11 12:09:37,170 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-09-11 12:09:37,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:37,170 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-09-11 12:09:37,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 12:09:37,171 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-09-11 12:09:37,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 12:09:37,171 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:37,171 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:37,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:37,372 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:37,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:37,373 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-09-11 12:09:37,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:37,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894906628] [2020-09-11 12:09:37,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:37,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:37,719 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:37,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894906628] [2020-09-11 12:09:37,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049526547] [2020-09-11 12:09:37,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:09:37,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 12:09:37,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:37,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 12:09:37,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:37,814 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:37,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:37,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 12:09:37,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594653188] [2020-09-11 12:09:37,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 12:09:37,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:37,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 12:09:37,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:09:37,815 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-09-11 12:09:38,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:38,694 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-09-11 12:09:38,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 12:09:38,694 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 12:09:38,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:38,695 INFO L225 Difference]: With dead ends: 127 [2020-09-11 12:09:38,695 INFO L226 Difference]: Without dead ends: 121 [2020-09-11 12:09:38,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-09-11 12:09:38,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-11 12:09:38,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-09-11 12:09:38,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 12:09:38,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-09-11 12:09:38,697 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-09-11 12:09:38,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:38,698 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-09-11 12:09:38,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 12:09:38,698 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-09-11 12:09:38,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 12:09:38,698 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:38,698 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:38,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-09-11 12:09:38,899 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:38,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:38,900 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-09-11 12:09:38,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:38,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347004371] [2020-09-11 12:09:38,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:38,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:39,251 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:39,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347004371] [2020-09-11 12:09:39,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282564617] [2020-09-11 12:09:39,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:09:39,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:09:39,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:39,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 12:09:39,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:39,347 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:09:39,366 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:39,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:39,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 12:09:39,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147476491] [2020-09-11 12:09:39,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 12:09:39,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:39,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 12:09:39,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:09:39,367 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-09-11 12:09:40,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:40,388 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-09-11 12:09:40,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 12:09:40,390 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 12:09:40,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:40,390 INFO L225 Difference]: With dead ends: 124 [2020-09-11 12:09:40,390 INFO L226 Difference]: Without dead ends: 118 [2020-09-11 12:09:40,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-09-11 12:09:40,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-11 12:09:40,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-09-11 12:09:40,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 12:09:40,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-09-11 12:09:40,393 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-09-11 12:09:40,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:40,393 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-09-11 12:09:40,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 12:09:40,393 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-09-11 12:09:40,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 12:09:40,393 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:40,393 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:40,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-09-11 12:09:40,594 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:40,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:40,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-09-11 12:09:40,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:40,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057331429] [2020-09-11 12:09:40,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:40,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:40,934 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:40,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057331429] [2020-09-11 12:09:40,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896486407] [2020-09-11 12:09:40,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:09:41,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 12:09:41,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:41,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 12:09:41,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:41,022 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:41,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:41,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 12:09:41,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646373442] [2020-09-11 12:09:41,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 12:09:41,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:41,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 12:09:41,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:09:41,023 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-09-11 12:09:41,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:41,925 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-09-11 12:09:41,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 12:09:41,926 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 12:09:41,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:41,926 INFO L225 Difference]: With dead ends: 125 [2020-09-11 12:09:41,927 INFO L226 Difference]: Without dead ends: 119 [2020-09-11 12:09:41,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-09-11 12:09:41,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-11 12:09:41,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-09-11 12:09:41,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-11 12:09:41,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-09-11 12:09:41,929 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-09-11 12:09:41,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:41,929 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-09-11 12:09:41,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 12:09:41,929 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-09-11 12:09:41,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 12:09:41,929 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:41,930 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:42,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-09-11 12:09:42,130 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:42,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:42,131 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-09-11 12:09:42,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:42,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989305424] [2020-09-11 12:09:42,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:42,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:42,464 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:42,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989305424] [2020-09-11 12:09:42,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823922135] [2020-09-11 12:09:42,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:09:42,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 12:09:42,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:42,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 12:09:42,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:42,568 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:09:42,592 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:42,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:42,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 12:09:42,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872435363] [2020-09-11 12:09:42,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 12:09:42,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:42,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 12:09:42,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:09:42,594 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-09-11 12:09:43,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:43,701 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-09-11 12:09:43,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 12:09:43,702 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 12:09:43,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:43,703 INFO L225 Difference]: With dead ends: 122 [2020-09-11 12:09:43,703 INFO L226 Difference]: Without dead ends: 116 [2020-09-11 12:09:43,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-09-11 12:09:43,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-11 12:09:43,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-09-11 12:09:43,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-11 12:09:43,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-09-11 12:09:43,706 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-09-11 12:09:43,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:43,706 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-09-11 12:09:43,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 12:09:43,707 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-09-11 12:09:43,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 12:09:43,707 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:43,707 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:43,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-09-11 12:09:43,908 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:43,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:43,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-09-11 12:09:43,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:43,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802418016] [2020-09-11 12:09:43,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:43,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:44,212 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:44,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802418016] [2020-09-11 12:09:44,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391764087] [2020-09-11 12:09:44,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:09:44,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:44,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 12:09:44,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:44,300 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:44,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:44,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 12:09:44,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548002311] [2020-09-11 12:09:44,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 12:09:44,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:44,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 12:09:44,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:09:44,301 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-09-11 12:09:45,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:45,332 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-09-11 12:09:45,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-11 12:09:45,333 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 12:09:45,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:45,334 INFO L225 Difference]: With dead ends: 123 [2020-09-11 12:09:45,334 INFO L226 Difference]: Without dead ends: 117 [2020-09-11 12:09:45,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-09-11 12:09:45,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-11 12:09:45,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-09-11 12:09:45,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-11 12:09:45,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-09-11 12:09:45,337 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-09-11 12:09:45,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:45,337 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-09-11 12:09:45,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 12:09:45,337 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-09-11 12:09:45,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 12:09:45,337 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:45,337 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:45,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:45,538 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:45,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:45,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-09-11 12:09:45,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:45,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643965901] [2020-09-11 12:09:45,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:45,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:45,865 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:45,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643965901] [2020-09-11 12:09:45,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045133436] [2020-09-11 12:09:45,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:09:45,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:09:45,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:45,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 12:09:45,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:45,960 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:09:45,979 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:45,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:45,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 12:09:45,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075647083] [2020-09-11 12:09:45,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 12:09:45,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:45,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 12:09:45,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:09:45,980 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-09-11 12:09:47,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:47,197 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-09-11 12:09:47,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-11 12:09:47,198 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 12:09:47,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:47,199 INFO L225 Difference]: With dead ends: 120 [2020-09-11 12:09:47,199 INFO L226 Difference]: Without dead ends: 114 [2020-09-11 12:09:47,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-09-11 12:09:47,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-11 12:09:47,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-09-11 12:09:47,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-11 12:09:47,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-09-11 12:09:47,201 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-09-11 12:09:47,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:47,202 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-09-11 12:09:47,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 12:09:47,202 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-09-11 12:09:47,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 12:09:47,202 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:47,202 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:47,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:47,403 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:47,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:47,403 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-09-11 12:09:47,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:47,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828272753] [2020-09-11 12:09:47,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:47,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:47,718 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:47,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828272753] [2020-09-11 12:09:47,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134376935] [2020-09-11 12:09:47,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:09:47,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 12:09:47,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:47,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 12:09:47,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:47,809 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:47,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:47,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 12:09:47,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298271700] [2020-09-11 12:09:47,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 12:09:47,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:47,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 12:09:47,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:09:47,811 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-09-11 12:09:48,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:48,939 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-09-11 12:09:48,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 12:09:48,940 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 12:09:48,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:48,940 INFO L225 Difference]: With dead ends: 121 [2020-09-11 12:09:48,941 INFO L226 Difference]: Without dead ends: 115 [2020-09-11 12:09:48,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-09-11 12:09:48,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-11 12:09:48,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-09-11 12:09:48,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 12:09:48,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 12:09:48,944 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-09-11 12:09:48,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:48,944 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 12:09:48,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 12:09:48,944 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 12:09:48,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 12:09:48,944 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:48,944 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:49,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-09-11 12:09:49,145 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:49,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:49,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-09-11 12:09:49,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:49,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943988477] [2020-09-11 12:09:49,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:49,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:49,464 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:49,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943988477] [2020-09-11 12:09:49,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676760477] [2020-09-11 12:09:49,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:09:49,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:09:49,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:49,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 12:09:49,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:49,588 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:09:49,612 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:49,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:49,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 12:09:49,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72553805] [2020-09-11 12:09:49,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 12:09:49,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:49,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 12:09:49,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:09:49,614 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-09-11 12:09:50,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:50,954 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-09-11 12:09:50,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-11 12:09:50,956 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 12:09:50,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:50,956 INFO L225 Difference]: With dead ends: 118 [2020-09-11 12:09:50,956 INFO L226 Difference]: Without dead ends: 112 [2020-09-11 12:09:50,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-09-11 12:09:50,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-11 12:09:50,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-09-11 12:09:50,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 12:09:50,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 12:09:50,959 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-09-11 12:09:50,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:50,959 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 12:09:50,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 12:09:50,960 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 12:09:50,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 12:09:50,960 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:50,960 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:51,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:51,161 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:51,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:51,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-09-11 12:09:51,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:51,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759383964] [2020-09-11 12:09:51,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:51,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:51,481 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:51,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759383964] [2020-09-11 12:09:51,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561082195] [2020-09-11 12:09:51,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:09:51,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 12:09:51,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:51,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 12:09:51,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:51,575 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:51,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:51,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 12:09:51,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051292554] [2020-09-11 12:09:51,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 12:09:51,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:51,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 12:09:51,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:09:51,577 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-09-11 12:09:52,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:52,701 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-09-11 12:09:52,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-11 12:09:52,702 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 12:09:52,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:52,703 INFO L225 Difference]: With dead ends: 119 [2020-09-11 12:09:52,703 INFO L226 Difference]: Without dead ends: 113 [2020-09-11 12:09:52,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-09-11 12:09:52,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-11 12:09:52,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-09-11 12:09:52,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-11 12:09:52,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-09-11 12:09:52,706 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-09-11 12:09:52,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:52,706 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-09-11 12:09:52,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 12:09:52,707 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-09-11 12:09:52,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 12:09:52,707 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:52,707 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:52,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:52,915 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:52,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:52,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-09-11 12:09:52,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:52,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201070019] [2020-09-11 12:09:52,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:52,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:53,232 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:53,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201070019] [2020-09-11 12:09:53,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024181272] [2020-09-11 12:09:53,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:09:53,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 12:09:53,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:53,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 12:09:53,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:53,334 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:09:53,354 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:53,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:53,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 12:09:53,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690869313] [2020-09-11 12:09:53,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 12:09:53,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:53,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 12:09:53,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:09:53,355 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-09-11 12:09:54,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:54,845 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-09-11 12:09:54,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-11 12:09:54,846 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 12:09:54,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:54,847 INFO L225 Difference]: With dead ends: 116 [2020-09-11 12:09:54,847 INFO L226 Difference]: Without dead ends: 110 [2020-09-11 12:09:54,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-09-11 12:09:54,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-11 12:09:54,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-09-11 12:09:54,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-11 12:09:54,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-09-11 12:09:54,851 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-09-11 12:09:54,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:54,851 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-09-11 12:09:54,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 12:09:54,852 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-09-11 12:09:54,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 12:09:54,852 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:54,852 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:55,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:55,058 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:55,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:55,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-09-11 12:09:55,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:55,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181368972] [2020-09-11 12:09:55,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:55,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:55,376 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:55,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181368972] [2020-09-11 12:09:55,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544145860] [2020-09-11 12:09:55,377 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:09:55,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:55,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 12:09:55,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:55,467 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:55,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:55,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 12:09:55,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468828823] [2020-09-11 12:09:55,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 12:09:55,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:55,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 12:09:55,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:09:55,469 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-09-11 12:09:56,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:56,721 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-09-11 12:09:56,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-11 12:09:56,722 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 12:09:56,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:56,723 INFO L225 Difference]: With dead ends: 136 [2020-09-11 12:09:56,723 INFO L226 Difference]: Without dead ends: 130 [2020-09-11 12:09:56,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-09-11 12:09:56,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-11 12:09:56,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-09-11 12:09:56,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-11 12:09:56,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-09-11 12:09:56,726 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-09-11 12:09:56,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:56,727 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-09-11 12:09:56,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 12:09:56,727 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-09-11 12:09:56,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 12:09:56,727 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:56,727 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:56,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:56,937 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:56,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:56,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-09-11 12:09:56,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:56,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451844118] [2020-09-11 12:09:56,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:56,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:57,255 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:57,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451844118] [2020-09-11 12:09:57,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602762027] [2020-09-11 12:09:57,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:09:57,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:09:57,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:57,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 12:09:57,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:57,350 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:09:57,372 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:57,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:57,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 12:09:57,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129744954] [2020-09-11 12:09:57,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 12:09:57,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:57,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 12:09:57,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:09:57,374 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-09-11 12:09:58,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:58,891 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-09-11 12:09:58,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-11 12:09:58,892 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 12:09:58,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:58,892 INFO L225 Difference]: With dead ends: 117 [2020-09-11 12:09:58,893 INFO L226 Difference]: Without dead ends: 109 [2020-09-11 12:09:58,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-09-11 12:09:58,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-11 12:09:58,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-09-11 12:09:58,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-11 12:09:58,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-09-11 12:09:58,894 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-09-11 12:09:58,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:58,895 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-09-11 12:09:58,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 12:09:58,895 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-09-11 12:09:58,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 12:09:58,895 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:58,895 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:59,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:59,096 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:59,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:59,096 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-09-11 12:09:59,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:59,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77108849] [2020-09-11 12:09:59,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:59,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:59,534 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:59,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77108849] [2020-09-11 12:09:59,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118801027] [2020-09-11 12:09:59,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:09:59,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 12:09:59,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:59,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 12:09:59,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:59,617 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:59,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:59,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 12:09:59,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332219555] [2020-09-11 12:09:59,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 12:09:59,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:59,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 12:09:59,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:09:59,618 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-09-11 12:10:00,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:00,340 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-09-11 12:10:00,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 12:10:00,341 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 12:10:00,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:00,342 INFO L225 Difference]: With dead ends: 134 [2020-09-11 12:10:00,342 INFO L226 Difference]: Without dead ends: 128 [2020-09-11 12:10:00,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-09-11 12:10:00,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-11 12:10:00,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-09-11 12:10:00,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 12:10:00,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 12:10:00,345 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 12:10:00,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:00,345 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 12:10:00,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 12:10:00,345 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 12:10:00,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 12:10:00,346 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:00,346 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:00,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-09-11 12:10:00,546 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:00,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:00,547 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-09-11 12:10:00,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:00,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816872519] [2020-09-11 12:10:00,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:00,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:00,999 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:01,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816872519] [2020-09-11 12:10:01,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744214353] [2020-09-11 12:10:01,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:10:01,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:10:01,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:01,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 12:10:01,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:01,097 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:10:01,112 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:01,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:01,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 12:10:01,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163559683] [2020-09-11 12:10:01,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 12:10:01,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:01,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 12:10:01,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:10:01,113 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 12:10:01,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:01,970 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-09-11 12:10:01,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 12:10:01,971 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 12:10:01,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:01,972 INFO L225 Difference]: With dead ends: 131 [2020-09-11 12:10:01,972 INFO L226 Difference]: Without dead ends: 125 [2020-09-11 12:10:01,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-09-11 12:10:01,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-11 12:10:01,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-09-11 12:10:01,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 12:10:01,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 12:10:01,974 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 12:10:01,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:01,975 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 12:10:01,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 12:10:01,975 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 12:10:01,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 12:10:01,975 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:01,975 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:02,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-09-11 12:10:02,176 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:02,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:02,177 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-09-11 12:10:02,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:02,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031701738] [2020-09-11 12:10:02,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:02,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:02,601 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:02,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031701738] [2020-09-11 12:10:02,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228207937] [2020-09-11 12:10:02,602 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:10:02,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 12:10:02,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:02,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 12:10:02,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:02,703 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:02,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:02,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 12:10:02,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702794467] [2020-09-11 12:10:02,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 12:10:02,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:02,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 12:10:02,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:10:02,704 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 12:10:03,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:03,519 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-09-11 12:10:03,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 12:10:03,521 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 12:10:03,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:03,521 INFO L225 Difference]: With dead ends: 128 [2020-09-11 12:10:03,521 INFO L226 Difference]: Without dead ends: 122 [2020-09-11 12:10:03,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 12:10:03,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-11 12:10:03,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-09-11 12:10:03,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 12:10:03,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 12:10:03,524 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 12:10:03,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:03,524 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 12:10:03,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 12:10:03,524 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 12:10:03,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 12:10:03,525 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:03,525 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:03,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:10:03,726 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:03,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:03,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-09-11 12:10:03,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:03,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266825592] [2020-09-11 12:10:03,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:03,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:04,141 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:04,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266825592] [2020-09-11 12:10:04,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954231469] [2020-09-11 12:10:04,142 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:10:04,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 12:10:04,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:04,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 12:10:04,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:04,249 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:10:04,263 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:04,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:04,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 12:10:04,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818968587] [2020-09-11 12:10:04,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 12:10:04,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:04,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 12:10:04,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:10:04,265 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 12:10:05,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:05,240 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-09-11 12:10:05,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 12:10:05,242 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 12:10:05,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:05,242 INFO L225 Difference]: With dead ends: 127 [2020-09-11 12:10:05,242 INFO L226 Difference]: Without dead ends: 121 [2020-09-11 12:10:05,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-09-11 12:10:05,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-11 12:10:05,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-09-11 12:10:05,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 12:10:05,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 12:10:05,245 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 12:10:05,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:05,245 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 12:10:05,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 12:10:05,245 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 12:10:05,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 12:10:05,246 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:05,246 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:05,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-09-11 12:10:05,447 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:05,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:05,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-09-11 12:10:05,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:05,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300212775] [2020-09-11 12:10:05,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:05,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:05,846 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:05,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300212775] [2020-09-11 12:10:05,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787353322] [2020-09-11 12:10:05,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:10:05,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:05,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 12:10:05,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:05,932 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:05,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:05,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 12:10:05,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998111714] [2020-09-11 12:10:05,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 12:10:05,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:05,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 12:10:05,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:10:05,933 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 12:10:06,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:06,814 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-09-11 12:10:06,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 12:10:06,815 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 12:10:06,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:06,816 INFO L225 Difference]: With dead ends: 124 [2020-09-11 12:10:06,816 INFO L226 Difference]: Without dead ends: 118 [2020-09-11 12:10:06,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 12:10:06,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-11 12:10:06,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-09-11 12:10:06,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 12:10:06,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 12:10:06,818 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 12:10:06,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:06,819 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 12:10:06,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 12:10:06,819 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 12:10:06,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 12:10:06,819 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:06,819 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:07,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:10:07,020 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:07,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:07,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-09-11 12:10:07,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:07,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070943595] [2020-09-11 12:10:07,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:07,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:07,418 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:07,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070943595] [2020-09-11 12:10:07,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879411939] [2020-09-11 12:10:07,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:10:07,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:10:07,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:07,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 12:10:07,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:07,520 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:10:07,538 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:07,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:07,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 12:10:07,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160275621] [2020-09-11 12:10:07,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 12:10:07,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:07,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 12:10:07,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:10:07,539 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 12:10:08,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:08,574 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-09-11 12:10:08,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 12:10:08,575 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 12:10:08,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:08,576 INFO L225 Difference]: With dead ends: 123 [2020-09-11 12:10:08,576 INFO L226 Difference]: Without dead ends: 117 [2020-09-11 12:10:08,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-09-11 12:10:08,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-11 12:10:08,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-09-11 12:10:08,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 12:10:08,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 12:10:08,579 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 12:10:08,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:08,579 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 12:10:08,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 12:10:08,580 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 12:10:08,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 12:10:08,580 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:08,580 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:08,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:10:08,781 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:08,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:08,781 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-09-11 12:10:08,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:08,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927023405] [2020-09-11 12:10:08,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:08,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:09,166 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:09,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927023405] [2020-09-11 12:10:09,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224030814] [2020-09-11 12:10:09,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:10:09,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 12:10:09,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:09,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 12:10:09,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:09,254 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:09,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:09,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 12:10:09,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942362962] [2020-09-11 12:10:09,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 12:10:09,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:09,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 12:10:09,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:10:09,256 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 12:10:10,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:10,245 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-09-11 12:10:10,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 12:10:10,246 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 12:10:10,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:10,246 INFO L225 Difference]: With dead ends: 120 [2020-09-11 12:10:10,247 INFO L226 Difference]: Without dead ends: 114 [2020-09-11 12:10:10,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-09-11 12:10:10,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-11 12:10:10,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-09-11 12:10:10,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 12:10:10,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 12:10:10,250 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 12:10:10,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:10,250 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 12:10:10,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 12:10:10,250 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 12:10:10,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 12:10:10,250 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:10,251 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:10,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:10:10,451 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:10,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:10,452 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-09-11 12:10:10,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:10,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519264552] [2020-09-11 12:10:10,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:10,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:10,847 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:10,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519264552] [2020-09-11 12:10:10,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767237059] [2020-09-11 12:10:10,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:10:10,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:10:10,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:10,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 12:10:10,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:10,937 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:10:10,955 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:10,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:10,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 12:10:10,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742765729] [2020-09-11 12:10:10,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 12:10:10,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:10,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 12:10:10,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:10:10,957 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 12:10:12,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:12,162 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-09-11 12:10:12,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 12:10:12,163 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 12:10:12,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:12,164 INFO L225 Difference]: With dead ends: 119 [2020-09-11 12:10:12,164 INFO L226 Difference]: Without dead ends: 113 [2020-09-11 12:10:12,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-09-11 12:10:12,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-11 12:10:12,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-09-11 12:10:12,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 12:10:12,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 12:10:12,167 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 12:10:12,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:12,167 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 12:10:12,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 12:10:12,168 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 12:10:12,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 12:10:12,168 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:12,168 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:12,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:10:12,370 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:12,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:12,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-09-11 12:10:12,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:12,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732614193] [2020-09-11 12:10:12,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:12,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:12,742 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:12,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732614193] [2020-09-11 12:10:12,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036167182] [2020-09-11 12:10:12,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:10:12,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 12:10:12,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:12,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 12:10:12,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:12,832 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:12,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:12,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 12:10:12,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73332641] [2020-09-11 12:10:12,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 12:10:12,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:12,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 12:10:12,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:10:12,834 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 12:10:13,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:13,893 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-09-11 12:10:13,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 12:10:13,894 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 12:10:13,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:13,895 INFO L225 Difference]: With dead ends: 116 [2020-09-11 12:10:13,895 INFO L226 Difference]: Without dead ends: 110 [2020-09-11 12:10:13,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-09-11 12:10:13,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-11 12:10:13,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-09-11 12:10:13,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 12:10:13,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 12:10:13,897 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 12:10:13,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:13,897 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 12:10:13,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 12:10:13,898 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 12:10:13,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 12:10:13,898 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:13,898 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:14,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-09-11 12:10:14,099 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:14,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:14,099 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-09-11 12:10:14,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:14,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032452174] [2020-09-11 12:10:14,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:14,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:14,480 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:14,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032452174] [2020-09-11 12:10:14,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221628589] [2020-09-11 12:10:14,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:10:14,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 12:10:14,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:14,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 12:10:14,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:14,583 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:10:14,602 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:14,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:14,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 12:10:14,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767572938] [2020-09-11 12:10:14,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 12:10:14,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:14,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 12:10:14,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:10:14,604 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 12:10:15,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:15,953 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-09-11 12:10:15,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-11 12:10:15,954 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 12:10:15,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:15,955 INFO L225 Difference]: With dead ends: 115 [2020-09-11 12:10:15,956 INFO L226 Difference]: Without dead ends: 109 [2020-09-11 12:10:15,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-09-11 12:10:15,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-11 12:10:15,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-09-11 12:10:15,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 12:10:15,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 12:10:15,959 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 12:10:15,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:15,959 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 12:10:15,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 12:10:15,959 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 12:10:15,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 12:10:15,959 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:15,960 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:16,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:10:16,168 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:16,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:16,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-09-11 12:10:16,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:16,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330473048] [2020-09-11 12:10:16,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:16,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:16,540 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:16,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330473048] [2020-09-11 12:10:16,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159990210] [2020-09-11 12:10:16,541 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:10:16,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:16,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 12:10:16,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:16,630 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:16,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:16,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 12:10:16,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469468345] [2020-09-11 12:10:16,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 12:10:16,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:16,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 12:10:16,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:10:16,631 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 12:10:17,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:17,811 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-09-11 12:10:17,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-11 12:10:17,812 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 12:10:17,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:17,813 INFO L225 Difference]: With dead ends: 112 [2020-09-11 12:10:17,813 INFO L226 Difference]: Without dead ends: 106 [2020-09-11 12:10:17,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-09-11 12:10:17,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-11 12:10:17,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-09-11 12:10:17,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 12:10:17,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 12:10:17,815 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 12:10:17,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:17,816 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 12:10:17,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 12:10:17,816 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 12:10:17,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 12:10:17,816 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:17,816 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:18,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-09-11 12:10:18,017 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:18,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:18,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-09-11 12:10:18,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:18,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886422594] [2020-09-11 12:10:18,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:18,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:18,375 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:18,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886422594] [2020-09-11 12:10:18,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156206828] [2020-09-11 12:10:18,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:10:18,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:10:18,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:18,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 12:10:18,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:18,481 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:10:18,506 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:18,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:18,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 12:10:18,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516465564] [2020-09-11 12:10:18,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 12:10:18,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:18,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 12:10:18,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:10:18,507 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 12:10:19,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:19,972 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-09-11 12:10:19,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-11 12:10:19,973 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 12:10:19,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:19,973 INFO L225 Difference]: With dead ends: 111 [2020-09-11 12:10:19,974 INFO L226 Difference]: Without dead ends: 105 [2020-09-11 12:10:19,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-09-11 12:10:19,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-11 12:10:19,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-09-11 12:10:19,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 12:10:19,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 12:10:19,977 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 12:10:19,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:19,977 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 12:10:19,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 12:10:19,977 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 12:10:19,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 12:10:19,977 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:19,977 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:20,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-09-11 12:10:20,178 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:20,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:20,179 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-09-11 12:10:20,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:20,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024432915] [2020-09-11 12:10:20,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:20,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:20,537 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:20,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024432915] [2020-09-11 12:10:20,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636973219] [2020-09-11 12:10:20,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:10:20,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 12:10:20,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:20,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 12:10:20,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:20,636 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:20,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:20,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 12:10:20,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524130105] [2020-09-11 12:10:20,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 12:10:20,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:20,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 12:10:20,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:10:20,638 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 12:10:21,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:21,870 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-09-11 12:10:21,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 12:10:21,872 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 12:10:21,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:21,872 INFO L225 Difference]: With dead ends: 108 [2020-09-11 12:10:21,872 INFO L226 Difference]: Without dead ends: 102 [2020-09-11 12:10:21,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-09-11 12:10:21,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-11 12:10:21,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-09-11 12:10:21,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 12:10:21,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 12:10:21,874 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 12:10:21,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:21,875 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 12:10:21,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 12:10:21,875 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 12:10:21,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 12:10:21,875 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:21,875 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:22,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:10:22,081 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:22,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:22,081 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-09-11 12:10:22,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:22,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364761397] [2020-09-11 12:10:22,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:22,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:22,438 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:22,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364761397] [2020-09-11 12:10:22,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538426713] [2020-09-11 12:10:22,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:10:22,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:10:22,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:22,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 12:10:22,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:22,546 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:10:22,567 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:22,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:22,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 12:10:22,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789099701] [2020-09-11 12:10:22,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 12:10:22,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:22,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 12:10:22,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:10:22,569 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 12:10:24,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:24,165 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-09-11 12:10:24,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-11 12:10:24,166 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 12:10:24,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:24,167 INFO L225 Difference]: With dead ends: 107 [2020-09-11 12:10:24,167 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 12:10:24,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-09-11 12:10:24,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 12:10:24,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-09-11 12:10:24,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 12:10:24,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 12:10:24,170 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 12:10:24,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:24,170 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 12:10:24,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 12:10:24,170 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 12:10:24,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 12:10:24,171 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:24,171 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:24,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:10:24,374 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:24,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:24,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-09-11 12:10:24,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:24,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482423198] [2020-09-11 12:10:24,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:24,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:24,724 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:24,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482423198] [2020-09-11 12:10:24,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944054307] [2020-09-11 12:10:24,725 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:10:24,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 12:10:24,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:24,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 12:10:24,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:24,824 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:24,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:24,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 12:10:24,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238484000] [2020-09-11 12:10:24,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 12:10:24,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:24,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 12:10:24,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:10:24,826 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 12:10:26,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:26,148 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-09-11 12:10:26,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-11 12:10:26,149 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 12:10:26,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:26,150 INFO L225 Difference]: With dead ends: 104 [2020-09-11 12:10:26,150 INFO L226 Difference]: Without dead ends: 98 [2020-09-11 12:10:26,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-09-11 12:10:26,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-11 12:10:26,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-09-11 12:10:26,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 12:10:26,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 12:10:26,157 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 12:10:26,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:26,157 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 12:10:26,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 12:10:26,157 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 12:10:26,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 12:10:26,158 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:26,158 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:26,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:10:26,358 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:26,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:26,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-09-11 12:10:26,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:26,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675275035] [2020-09-11 12:10:26,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:26,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:26,703 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:26,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675275035] [2020-09-11 12:10:26,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247220744] [2020-09-11 12:10:26,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:10:26,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 12:10:26,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:26,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 12:10:26,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:26,814 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:10:26,835 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:26,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:26,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 12:10:26,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875424097] [2020-09-11 12:10:26,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 12:10:26,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:26,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 12:10:26,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:10:26,837 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 12:10:28,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:28,570 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-09-11 12:10:28,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-11 12:10:28,571 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 12:10:28,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:28,572 INFO L225 Difference]: With dead ends: 103 [2020-09-11 12:10:28,572 INFO L226 Difference]: Without dead ends: 97 [2020-09-11 12:10:28,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-09-11 12:10:28,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-11 12:10:28,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-09-11 12:10:28,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 12:10:28,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 12:10:28,574 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 12:10:28,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:28,575 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 12:10:28,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 12:10:28,575 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 12:10:28,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 12:10:28,575 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:28,575 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:28,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-09-11 12:10:28,776 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:28,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:28,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-09-11 12:10:28,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:28,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490895817] [2020-09-11 12:10:28,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:28,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:29,126 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:29,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490895817] [2020-09-11 12:10:29,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419630927] [2020-09-11 12:10:29,127 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:10:29,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:29,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 12:10:29,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:29,223 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:29,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:29,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 12:10:29,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737174053] [2020-09-11 12:10:29,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 12:10:29,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:29,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 12:10:29,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:10:29,225 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 12:10:30,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:30,649 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-09-11 12:10:30,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-11 12:10:30,650 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 12:10:30,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:30,651 INFO L225 Difference]: With dead ends: 119 [2020-09-11 12:10:30,651 INFO L226 Difference]: Without dead ends: 113 [2020-09-11 12:10:30,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-09-11 12:10:30,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-11 12:10:30,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-09-11 12:10:30,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-11 12:10:30,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-09-11 12:10:30,654 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-09-11 12:10:30,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:30,654 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-09-11 12:10:30,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 12:10:30,654 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-09-11 12:10:30,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 12:10:30,654 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:30,654 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:30,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:10:30,855 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:30,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:30,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-09-11 12:10:30,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:30,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349097899] [2020-09-11 12:10:30,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:30,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:31,201 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:31,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349097899] [2020-09-11 12:10:31,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551401989] [2020-09-11 12:10:31,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:10:31,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:10:31,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:31,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 12:10:31,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:31,307 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:10:31,330 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:31,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:31,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 12:10:31,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936293664] [2020-09-11 12:10:31,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 12:10:31,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:31,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 12:10:31,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:10:31,332 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-09-11 12:10:33,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:33,108 INFO L93 Difference]: Finished difference Result 100 states and 249 transitions. [2020-09-11 12:10:33,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-11 12:10:33,109 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 12:10:33,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:33,110 INFO L225 Difference]: With dead ends: 100 [2020-09-11 12:10:33,110 INFO L226 Difference]: Without dead ends: 92 [2020-09-11 12:10:33,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-09-11 12:10:33,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-11 12:10:33,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-09-11 12:10:33,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-11 12:10:33,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-09-11 12:10:33,113 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-09-11 12:10:33,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:33,113 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-09-11 12:10:33,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 12:10:33,113 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-09-11 12:10:33,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 12:10:33,114 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:33,114 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:33,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:10:33,317 INFO L427 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:33,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:33,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-09-11 12:10:33,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:33,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247054907] [2020-09-11 12:10:33,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:33,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:33,666 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:33,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247054907] [2020-09-11 12:10:33,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434408550] [2020-09-11 12:10:33,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:10:33,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 12:10:33,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:33,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 12:10:33,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:33,772 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:10:33,800 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:33,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:33,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 12:10:33,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869242091] [2020-09-11 12:10:33,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 12:10:33,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:33,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 12:10:33,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:10:33,802 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-09-11 12:10:35,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:35,475 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-09-11 12:10:35,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-11 12:10:35,477 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 12:10:35,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:35,477 INFO L225 Difference]: With dead ends: 116 [2020-09-11 12:10:35,477 INFO L226 Difference]: Without dead ends: 111 [2020-09-11 12:10:35,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-09-11 12:10:35,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-11 12:10:35,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-09-11 12:10:35,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-11 12:10:35,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-09-11 12:10:35,480 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-09-11 12:10:35,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:35,480 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-09-11 12:10:35,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 12:10:35,480 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-09-11 12:10:35,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 12:10:35,481 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:35,481 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:35,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:10:35,682 INFO L427 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:35,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:35,682 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-09-11 12:10:35,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:35,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727369144] [2020-09-11 12:10:35,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:35,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:36,076 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:36,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727369144] [2020-09-11 12:10:36,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565391920] [2020-09-11 12:10:36,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:10:36,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:10:36,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:36,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 12:10:36,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:36,173 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:10:36,201 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:36,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:36,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-11 12:10:36,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56357943] [2020-09-11 12:10:36,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-11 12:10:36,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:36,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-11 12:10:36,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:10:36,203 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-09-11 12:10:37,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:37,985 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-09-11 12:10:37,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-11 12:10:37,986 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-11 12:10:37,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:37,986 INFO L225 Difference]: With dead ends: 96 [2020-09-11 12:10:37,987 INFO L226 Difference]: Without dead ends: 91 [2020-09-11 12:10:37,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-09-11 12:10:37,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-11 12:10:37,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-09-11 12:10:37,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 12:10:37,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-09-11 12:10:37,990 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-09-11 12:10:37,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:37,990 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-09-11 12:10:37,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-11 12:10:37,990 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-09-11 12:10:37,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 12:10:37,991 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:37,991 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:38,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:10:38,198 INFO L427 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:38,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:38,199 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-09-11 12:10:38,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:38,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634748562] [2020-09-11 12:10:38,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:38,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:38,685 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:38,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634748562] [2020-09-11 12:10:38,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114043907] [2020-09-11 12:10:38,686 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:10:38,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-11 12:10:38,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:38,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 12:10:38,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:38,775 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:38,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:38,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-11 12:10:38,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654293516] [2020-09-11 12:10:38,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 12:10:38,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:38,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 12:10:38,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:10:38,776 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-09-11 12:10:39,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:39,508 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-09-11 12:10:39,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 12:10:39,509 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-11 12:10:39,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:39,510 INFO L225 Difference]: With dead ends: 102 [2020-09-11 12:10:39,510 INFO L226 Difference]: Without dead ends: 96 [2020-09-11 12:10:39,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 12:10:39,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-11 12:10:39,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-09-11 12:10:39,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 12:10:39,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-09-11 12:10:39,512 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-09-11 12:10:39,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:39,512 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-09-11 12:10:39,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 12:10:39,512 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-09-11 12:10:39,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 12:10:39,512 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:39,512 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:39,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-09-11 12:10:39,713 INFO L427 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:39,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:39,714 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-09-11 12:10:39,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:39,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860891461] [2020-09-11 12:10:39,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:39,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:40,217 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:40,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860891461] [2020-09-11 12:10:40,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378911482] [2020-09-11 12:10:40,218 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:10:40,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-11 12:10:40,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:40,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 12:10:40,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:40,320 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:10:40,333 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:40,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:40,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-11 12:10:40,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177238671] [2020-09-11 12:10:40,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-11 12:10:40,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:40,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-11 12:10:40,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:10:40,335 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-09-11 12:10:41,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:41,167 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-09-11 12:10:41,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 12:10:41,168 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-11 12:10:41,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:41,169 INFO L225 Difference]: With dead ends: 122 [2020-09-11 12:10:41,169 INFO L226 Difference]: Without dead ends: 116 [2020-09-11 12:10:41,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-09-11 12:10:41,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-11 12:10:41,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-09-11 12:10:41,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-11 12:10:41,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-09-11 12:10:41,172 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-09-11 12:10:41,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:41,172 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-09-11 12:10:41,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-11 12:10:41,172 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-09-11 12:10:41,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 12:10:41,173 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:41,173 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:41,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-09-11 12:10:41,377 INFO L427 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:41,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:41,378 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-09-11 12:10:41,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:41,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696569543] [2020-09-11 12:10:41,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:41,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:41,845 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:41,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696569543] [2020-09-11 12:10:41,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679991861] [2020-09-11 12:10:41,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 12:10:41,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:41,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 12:10:41,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:41,929 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:41,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:41,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-11 12:10:41,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937137803] [2020-09-11 12:10:41,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 12:10:41,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:41,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 12:10:41,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:10:41,931 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. Received shutdown request... [2020-09-11 12:10:42,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:10:42,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-09-11 12:10:42,712 WARN L544 AbstractCegarLoop]: Verification canceled [2020-09-11 12:10:42,717 WARN L228 ceAbstractionStarter]: Timeout [2020-09-11 12:10:42,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.09 12:10:42 BasicIcfg [2020-09-11 12:10:42,717 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-11 12:10:42,719 INFO L168 Benchmark]: Toolchain (without parser) took 245656.59 ms. Allocated memory was 142.1 MB in the beginning and 211.3 MB in the end (delta: 69.2 MB). Free memory was 103.0 MB in the beginning and 95.9 MB in the end (delta: 7.1 MB). Peak memory consumption was 76.3 MB. Max. memory is 7.1 GB. [2020-09-11 12:10:42,720 INFO L168 Benchmark]: CDTParser took 0.48 ms. Allocated memory is still 142.1 MB. Free memory was 122.4 MB in the beginning and 122.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-11 12:10:42,720 INFO L168 Benchmark]: CACSL2BoogieTranslator took 795.88 ms. Allocated memory was 142.1 MB in the beginning and 203.9 MB in the end (delta: 61.9 MB). Free memory was 102.4 MB in the beginning and 163.5 MB in the end (delta: -61.0 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. [2020-09-11 12:10:42,721 INFO L168 Benchmark]: Boogie Procedure Inliner took 73.29 ms. Allocated memory is still 203.9 MB. Free memory was 163.5 MB in the beginning and 161.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-09-11 12:10:42,721 INFO L168 Benchmark]: Boogie Preprocessor took 32.89 ms. Allocated memory is still 203.9 MB. Free memory was 161.5 MB in the beginning and 159.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-09-11 12:10:42,722 INFO L168 Benchmark]: RCFGBuilder took 470.72 ms. Allocated memory is still 203.9 MB. Free memory was 159.6 MB in the beginning and 139.4 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. [2020-09-11 12:10:42,722 INFO L168 Benchmark]: TraceAbstraction took 244273.28 ms. Allocated memory was 203.9 MB in the beginning and 211.3 MB in the end (delta: 7.3 MB). Free memory was 139.4 MB in the beginning and 95.9 MB in the end (delta: 43.5 MB). Peak memory consumption was 50.8 MB. Max. memory is 7.1 GB. [2020-09-11 12:10:42,724 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.48 ms. Allocated memory is still 142.1 MB. Free memory was 122.4 MB in the beginning and 122.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 795.88 ms. Allocated memory was 142.1 MB in the beginning and 203.9 MB in the end (delta: 61.9 MB). Free memory was 102.4 MB in the beginning and 163.5 MB in the end (delta: -61.0 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 73.29 ms. Allocated memory is still 203.9 MB. Free memory was 163.5 MB in the beginning and 161.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 32.89 ms. Allocated memory is still 203.9 MB. Free memory was 161.5 MB in the beginning and 159.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 470.72 ms. Allocated memory is still 203.9 MB. Free memory was 159.6 MB in the beginning and 139.4 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 244273.28 ms. Allocated memory was 203.9 MB in the beginning and 211.3 MB in the end (delta: 7.3 MB). Free memory was 139.4 MB in the beginning and 95.9 MB in the end (delta: 43.5 MB). Peak memory consumption was 50.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.4s, 57 ProgramPointsBefore, 20 ProgramPointsAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 486 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 703]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 703). Cancelled while BasicCegarLoop was constructing difference of abstraction (72states) and FLOYD_HOARE automaton (currently 21 states, 23 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 39 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 244.1s, OverallIterations: 201, TraceHistogramMax: 10, AutomataDifference: 136.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.5s, HoareTripleCheckerStatistics: 3208 SDtfs, 10970 SDslu, 19496 SDs, 0 SdLazy, 21090 SolverSat, 12170 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 26.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10539 GetRequests, 3498 SyntacticMatches, 196 SemanticMatches, 6844 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63200 ImplicationChecksByTransitivity, 139.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=195, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 200 MinimizatonAttempts, 4734 StatesRemovedByMinimization, 199 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.8s SsaConstructionTime, 5.8s SatisfiabilityAnalysisTime, 49.3s InterpolantComputationTime, 8036 NumberOfCodeBlocks, 8036 NumberOfCodeBlocksAsserted, 996 NumberOfCheckSat, 7639 ConstructedInterpolants, 0 QuantifiedInterpolants, 702391 SizeOfPredicates, 2428 NumberOfNonLiveVariables, 24684 ConjunctsInSsa, 3213 ConjunctsInUnsatCore, 397 InterpolantComputations, 5 PerfectInterpolantSequences, 0/14496 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