/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-15 16:42:04,027 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 16:42:04,029 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 16:42:04,053 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 16:42:04,053 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 16:42:04,054 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 16:42:04,056 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 16:42:04,057 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 16:42:04,059 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 16:42:04,060 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 16:42:04,060 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 16:42:04,061 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 16:42:04,062 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 16:42:04,063 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 16:42:04,064 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 16:42:04,065 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 16:42:04,065 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 16:42:04,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 16:42:04,068 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 16:42:04,069 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 16:42:04,071 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 16:42:04,072 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 16:42:04,073 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 16:42:04,073 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 16:42:04,076 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 16:42:04,076 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 16:42:04,076 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 16:42:04,077 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 16:42:04,077 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 16:42:04,078 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 16:42:04,078 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 16:42:04,079 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 16:42:04,080 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 16:42:04,080 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 16:42:04,081 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 16:42:04,082 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 16:42:04,082 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 16:42:04,082 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 16:42:04,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 16:42:04,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 16:42:04,084 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 16:42:04,085 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-15 16:42:04,107 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 16:42:04,107 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 16:42:04,109 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 16:42:04,109 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 16:42:04,109 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 16:42:04,109 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 16:42:04,109 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 16:42:04,110 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 16:42:04,110 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 16:42:04,110 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 16:42:04,110 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 16:42:04,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 16:42:04,111 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 16:42:04,111 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 16:42:04,111 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 16:42:04,111 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 16:42:04,111 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 16:42:04,112 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 16:42:04,112 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 16:42:04,112 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 16:42:04,112 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 16:42:04,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 16:42:04,113 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 16:42:04,113 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 16:42:04,113 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 16:42:04,113 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 16:42:04,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 16:42:04,114 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 16:42:04,114 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 16:42:04,114 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-15 16:42:04,420 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 16:42:04,438 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 16:42:04,443 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 16:42:04,444 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 16:42:04,444 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 16:42:04,445 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-10-15 16:42:04,514 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80368ba62/50233772186c46789acdfcc38a9411db/FLAGcd878bc2b [2020-10-15 16:42:05,028 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 16:42:05,029 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-10-15 16:42:05,052 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80368ba62/50233772186c46789acdfcc38a9411db/FLAGcd878bc2b [2020-10-15 16:42:05,385 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80368ba62/50233772186c46789acdfcc38a9411db [2020-10-15 16:42:05,392 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 16:42:05,394 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-15 16:42:05,396 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 16:42:05,396 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 16:42:05,400 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 16:42:05,401 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:42:05" (1/1) ... [2020-10-15 16:42:05,405 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a62aadb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:05, skipping insertion in model container [2020-10-15 16:42:05,405 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:42:05" (1/1) ... [2020-10-15 16:42:05,413 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 16:42:05,469 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 16:42:05,927 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 16:42:05,941 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 16:42:06,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 16:42:06,099 INFO L208 MainTranslator]: Completed translation [2020-10-15 16:42:06,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:06 WrapperNode [2020-10-15 16:42:06,100 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 16:42:06,102 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-15 16:42:06,102 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-15 16:42:06,102 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-15 16:42:06,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:06" (1/1) ... [2020-10-15 16:42:06,150 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:06" (1/1) ... [2020-10-15 16:42:06,172 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-15 16:42:06,173 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 16:42:06,173 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 16:42:06,173 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 16:42:06,180 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:06" (1/1) ... [2020-10-15 16:42:06,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:06" (1/1) ... [2020-10-15 16:42:06,182 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:06" (1/1) ... [2020-10-15 16:42:06,182 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:06" (1/1) ... [2020-10-15 16:42:06,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:06" (1/1) ... [2020-10-15 16:42:06,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:06" (1/1) ... [2020-10-15 16:42:06,194 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:06" (1/1) ... [2020-10-15 16:42:06,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 16:42:06,197 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 16:42:06,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 16:42:06,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 16:42:06,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 16:42:06,267 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-15 16:42:06,267 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-15 16:42:06,267 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-15 16:42:06,267 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-15 16:42:06,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-15 16:42:06,268 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-15 16:42:06,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-15 16:42:06,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-15 16:42:06,268 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-15 16:42:06,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 16:42:06,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 16:42:06,270 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-15 16:42:06,547 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 16:42:06,547 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-15 16:42:06,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:42:06 BoogieIcfgContainer [2020-10-15 16:42:06,549 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 16:42:06,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 16:42:06,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 16:42:06,554 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 16:42:06,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 04:42:05" (1/3) ... [2020-10-15 16:42:06,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6097545a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:42:06, skipping insertion in model container [2020-10-15 16:42:06,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:06" (2/3) ... [2020-10-15 16:42:06,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6097545a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:42:06, skipping insertion in model container [2020-10-15 16:42:06,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:42:06" (3/3) ... [2020-10-15 16:42:06,559 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2020-10-15 16:42:06,571 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-15 16:42:06,572 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-15 16:42:06,580 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 16:42:06,581 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-15 16:42:06,608 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,608 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,609 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,609 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,610 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,610 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,610 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,611 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,611 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,611 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,612 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,612 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,612 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,612 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,613 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,613 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,613 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,613 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,614 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,614 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,615 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,615 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,615 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,616 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,616 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,616 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,617 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,617 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,620 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,621 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,621 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,621 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,621 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,621 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,633 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,633 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,633 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,634 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,634 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,634 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:06,666 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-15 16:42:06,692 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-15 16:42:06,692 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-15 16:42:06,692 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-15 16:42:06,692 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 16:42:06,692 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 16:42:06,692 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-15 16:42:06,693 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 16:42:06,693 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 16:42:06,703 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-15 16:42:06,704 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-15 16:42:06,706 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-15 16:42:06,708 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-15 16:42:06,745 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-15 16:42:06,745 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-15 16:42:06,751 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-10-15 16:42:06,754 INFO L117 LiptonReduction]: Number of co-enabled transitions 924 [2020-10-15 16:42:08,037 INFO L132 LiptonReduction]: Checked pairs total: 911 [2020-10-15 16:42:08,038 INFO L134 LiptonReduction]: Total number of compositions: 45 [2020-10-15 16:42:08,047 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-15 16:42:08,076 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-15 16:42:08,080 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-15 16:42:08,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-15 16:42:08,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:08,092 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-15 16:42:08,092 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:08,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:08,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-10-15 16:42:08,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:08,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770478958] [2020-10-15 16:42:08,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:08,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:08,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:08,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770478958] [2020-10-15 16:42:08,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:42:08,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-15 16:42:08,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564885203] [2020-10-15 16:42:08,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 16:42:08,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:08,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 16:42:08,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 16:42:08,331 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-15 16:42:08,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:08,398 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-15 16:42:08,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 16:42:08,400 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-15 16:42:08,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:08,411 INFO L225 Difference]: With dead ends: 75 [2020-10-15 16:42:08,411 INFO L226 Difference]: Without dead ends: 42 [2020-10-15 16:42:08,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 16:42:08,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-15 16:42:08,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-15 16:42:08,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 16:42:08,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-15 16:42:08,452 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-15 16:42:08,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:08,453 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-15 16:42:08,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 16:42:08,453 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-15 16:42:08,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 16:42:08,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:08,454 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:08,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 16:42:08,455 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:08,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:08,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-10-15 16:42:08,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:08,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257302676] [2020-10-15 16:42:08,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:08,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:08,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:08,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257302676] [2020-10-15 16:42:08,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:42:08,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 16:42:08,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817199552] [2020-10-15 16:42:08,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 16:42:08,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:08,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 16:42:08,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 16:42:08,565 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-15 16:42:08,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:08,597 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-15 16:42:08,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 16:42:08,597 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-15 16:42:08,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:08,599 INFO L225 Difference]: With dead ends: 56 [2020-10-15 16:42:08,599 INFO L226 Difference]: Without dead ends: 50 [2020-10-15 16:42:08,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:42:08,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-15 16:42:08,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-15 16:42:08,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 16:42:08,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-15 16:42:08,607 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-15 16:42:08,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:08,609 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-15 16:42:08,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 16:42:08,609 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-15 16:42:08,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:42:08,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:08,610 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:08,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 16:42:08,610 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:08,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:08,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-10-15 16:42:08,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:08,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505230537] [2020-10-15 16:42:08,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:08,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:08,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:08,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505230537] [2020-10-15 16:42:08,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:42:08,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 16:42:08,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525243741] [2020-10-15 16:42:08,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 16:42:08,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:08,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 16:42:08,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:42:08,685 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-10-15 16:42:08,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:08,772 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-10-15 16:42:08,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:42:08,773 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 16:42:08,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:08,774 INFO L225 Difference]: With dead ends: 78 [2020-10-15 16:42:08,775 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 16:42:08,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:42:08,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 16:42:08,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-10-15 16:42:08,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 16:42:08,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-15 16:42:08,792 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-10-15 16:42:08,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:08,792 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-15 16:42:08,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 16:42:08,793 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-15 16:42:08,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:42:08,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:08,796 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:08,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 16:42:08,797 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:08,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:08,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-10-15 16:42:08,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:08,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119817754] [2020-10-15 16:42:08,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:08,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:08,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:08,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119817754] [2020-10-15 16:42:08,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:42:08,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 16:42:08,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695513435] [2020-10-15 16:42:08,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 16:42:08,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:08,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 16:42:08,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:42:08,912 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-10-15 16:42:08,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:08,986 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-15 16:42:08,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 16:42:08,987 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 16:42:08,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:08,988 INFO L225 Difference]: With dead ends: 54 [2020-10-15 16:42:08,988 INFO L226 Difference]: Without dead ends: 43 [2020-10-15 16:42:08,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:42:08,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-15 16:42:08,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-15 16:42:08,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-15 16:42:08,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-10-15 16:42:08,994 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-10-15 16:42:08,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:08,995 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-10-15 16:42:08,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 16:42:08,995 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-10-15 16:42:08,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:42:08,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:08,996 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:08,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 16:42:08,997 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:08,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:08,997 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-10-15 16:42:08,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:08,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932491476] [2020-10-15 16:42:08,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:09,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:09,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:09,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932491476] [2020-10-15 16:42:09,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:42:09,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 16:42:09,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381970044] [2020-10-15 16:42:09,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 16:42:09,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:09,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 16:42:09,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:42:09,089 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-10-15 16:42:09,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:09,210 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-10-15 16:42:09,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 16:42:09,216 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 16:42:09,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:09,217 INFO L225 Difference]: With dead ends: 57 [2020-10-15 16:42:09,217 INFO L226 Difference]: Without dead ends: 51 [2020-10-15 16:42:09,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:42:09,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-15 16:42:09,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-10-15 16:42:09,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-15 16:42:09,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-15 16:42:09,223 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-10-15 16:42:09,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:09,223 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-15 16:42:09,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 16:42:09,223 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-15 16:42:09,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:42:09,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:09,226 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:09,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 16:42:09,227 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:09,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:09,227 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-10-15 16:42:09,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:09,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283122335] [2020-10-15 16:42:09,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:09,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:09,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:09,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283122335] [2020-10-15 16:42:09,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434464035] [2020-10-15 16:42:09,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:09,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:42:09,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:09,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:42:09,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:09,420 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:42:09,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:09,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:09,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-15 16:42:09,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199139733] [2020-10-15 16:42:09,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 16:42:09,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:09,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 16:42:09,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-15 16:42:09,435 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-10-15 16:42:09,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:09,542 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-10-15 16:42:09,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:42:09,543 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-15 16:42:09,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:09,544 INFO L225 Difference]: With dead ends: 48 [2020-10-15 16:42:09,544 INFO L226 Difference]: Without dead ends: 43 [2020-10-15 16:42:09,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:42:09,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-15 16:42:09,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-15 16:42:09,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-15 16:42:09,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-10-15 16:42:09,549 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-10-15 16:42:09,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:09,549 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-10-15 16:42:09,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 16:42:09,549 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-10-15 16:42:09,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:42:09,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:09,550 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:09,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-15 16:42:09,757 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:09,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:09,758 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-10-15 16:42:09,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:09,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624222493] [2020-10-15 16:42:09,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:09,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:09,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:09,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624222493] [2020-10-15 16:42:09,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375089116] [2020-10-15 16:42:09,816 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:09,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:09,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:09,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:42:09,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:09,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:09,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:09,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-15 16:42:09,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547882885] [2020-10-15 16:42:09,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 16:42:09,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:09,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 16:42:09,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-15 16:42:09,899 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-10-15 16:42:09,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:09,968 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-15 16:42:09,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:42:09,968 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-15 16:42:09,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:09,969 INFO L225 Difference]: With dead ends: 54 [2020-10-15 16:42:09,969 INFO L226 Difference]: Without dead ends: 48 [2020-10-15 16:42:09,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:42:09,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-15 16:42:09,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-15 16:42:09,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 16:42:09,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-10-15 16:42:09,975 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-10-15 16:42:09,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:09,975 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-10-15 16:42:09,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 16:42:09,976 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-10-15 16:42:09,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:42:09,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:09,976 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:10,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:10,188 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:10,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:10,189 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-10-15 16:42:10,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:10,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562305098] [2020-10-15 16:42:10,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:10,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:10,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:10,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562305098] [2020-10-15 16:42:10,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631161570] [2020-10-15 16:42:10,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:10,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:42:10,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:10,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:42:10,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:10,329 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:10,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:10,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:10,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-15 16:42:10,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989407971] [2020-10-15 16:42:10,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 16:42:10,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:10,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 16:42:10,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-15 16:42:10,363 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-10-15 16:42:10,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:10,497 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-10-15 16:42:10,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:42:10,497 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-15 16:42:10,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:10,498 INFO L225 Difference]: With dead ends: 58 [2020-10-15 16:42:10,498 INFO L226 Difference]: Without dead ends: 52 [2020-10-15 16:42:10,499 INFO L677 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 [2020-10-15 16:42:10,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-15 16:42:10,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-15 16:42:10,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-15 16:42:10,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-15 16:42:10,508 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-10-15 16:42:10,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:10,509 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-15 16:42:10,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 16:42:10,509 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-15 16:42:10,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:42:10,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:10,512 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:10,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:10,724 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:10,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:10,726 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-10-15 16:42:10,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:10,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960895975] [2020-10-15 16:42:10,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:10,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:10,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:10,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960895975] [2020-10-15 16:42:10,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879493181] [2020-10-15 16:42:10,804 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:10,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:10,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:42:10,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:10,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:10,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:10,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-15 16:42:10,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26740097] [2020-10-15 16:42:10,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 16:42:10,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:10,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 16:42:10,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-15 16:42:10,868 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-10-15 16:42:10,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:10,985 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-15 16:42:10,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:42:10,986 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-15 16:42:10,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:10,987 INFO L225 Difference]: With dead ends: 78 [2020-10-15 16:42:10,987 INFO L226 Difference]: Without dead ends: 72 [2020-10-15 16:42:10,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:42:10,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-15 16:42:10,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-10-15 16:42:10,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 16:42:10,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-10-15 16:42:10,993 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-10-15 16:42:10,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:10,994 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-10-15 16:42:10,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 16:42:10,994 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-10-15 16:42:10,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:42:10,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:10,995 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:11,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:11,207 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:11,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:11,207 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-10-15 16:42:11,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:11,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430782420] [2020-10-15 16:42:11,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:11,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:11,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:11,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430782420] [2020-10-15 16:42:11,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052653577] [2020-10-15 16:42:11,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:11,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:11,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:11,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:42:11,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:11,371 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:11,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:11,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:11,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-15 16:42:11,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634689595] [2020-10-15 16:42:11,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 16:42:11,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:11,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 16:42:11,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-15 16:42:11,382 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-10-15 16:42:11,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:11,525 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-10-15 16:42:11,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:42:11,526 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-15 16:42:11,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:11,527 INFO L225 Difference]: With dead ends: 62 [2020-10-15 16:42:11,527 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 16:42:11,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:42:11,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 16:42:11,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-10-15 16:42:11,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-15 16:42:11,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-15 16:42:11,531 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-15 16:42:11,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:11,532 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-15 16:42:11,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 16:42:11,532 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-15 16:42:11,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:42:11,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:11,533 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:11,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-15 16:42:11,743 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:11,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:11,743 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-10-15 16:42:11,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:11,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230012401] [2020-10-15 16:42:11,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:11,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:11,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:11,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230012401] [2020-10-15 16:42:11,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975104314] [2020-10-15 16:42:11,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:11,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:42:11,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:11,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:42:11,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:11,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:11,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:11,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-15 16:42:11,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842378391] [2020-10-15 16:42:11,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 16:42:11,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:11,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 16:42:11,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-15 16:42:11,883 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-10-15 16:42:11,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:11,994 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-10-15 16:42:11,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:42:11,994 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-15 16:42:11,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:11,995 INFO L225 Difference]: With dead ends: 64 [2020-10-15 16:42:11,995 INFO L226 Difference]: Without dead ends: 58 [2020-10-15 16:42:11,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:42:11,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-15 16:42:12,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-10-15 16:42:12,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-15 16:42:12,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-10-15 16:42:12,005 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-10-15 16:42:12,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:12,005 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-10-15 16:42:12,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 16:42:12,005 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-10-15 16:42:12,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:42:12,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:12,008 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:12,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:12,218 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:12,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:12,219 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-10-15 16:42:12,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:12,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907866710] [2020-10-15 16:42:12,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:12,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:12,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907866710] [2020-10-15 16:42:12,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363989927] [2020-10-15 16:42:12,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:12,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:42:12,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:12,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:42:12,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:12,340 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:12,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:12,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:12,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-15 16:42:12,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388457768] [2020-10-15 16:42:12,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:42:12,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:12,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:42:12,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:42:12,353 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-10-15 16:42:12,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:12,505 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-10-15 16:42:12,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:42:12,505 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-15 16:42:12,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:12,506 INFO L225 Difference]: With dead ends: 61 [2020-10-15 16:42:12,506 INFO L226 Difference]: Without dead ends: 55 [2020-10-15 16:42:12,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:42:12,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-15 16:42:12,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-15 16:42:12,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-15 16:42:12,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-15 16:42:12,510 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-10-15 16:42:12,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:12,510 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-15 16:42:12,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:42:12,511 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-15 16:42:12,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:42:12,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:12,512 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:12,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:12,723 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:12,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:12,724 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-10-15 16:42:12,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:12,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956797155] [2020-10-15 16:42:12,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:12,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:12,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:12,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956797155] [2020-10-15 16:42:12,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182653157] [2020-10-15 16:42:12,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:12,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:12,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:12,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:42:12,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:12,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:12,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:12,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-15 16:42:12,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163355087] [2020-10-15 16:42:12,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 16:42:12,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:12,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 16:42:12,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-15 16:42:12,831 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-10-15 16:42:12,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:12,958 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-15 16:42:12,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:42:12,958 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-15 16:42:12,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:12,959 INFO L225 Difference]: With dead ends: 77 [2020-10-15 16:42:12,959 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 16:42:12,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:42:12,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 16:42:12,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-10-15 16:42:12,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-15 16:42:12,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-10-15 16:42:12,964 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-10-15 16:42:12,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:12,964 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-10-15 16:42:12,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 16:42:12,965 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-10-15 16:42:12,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:42:12,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:12,965 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:13,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-15 16:42:13,177 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:13,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:13,178 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-10-15 16:42:13,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:13,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983652629] [2020-10-15 16:42:13,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:13,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:13,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:13,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983652629] [2020-10-15 16:42:13,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509352218] [2020-10-15 16:42:13,247 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:13,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:42:13,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:13,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:42:13,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:13,318 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:13,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:13,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:13,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-15 16:42:13,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879627554] [2020-10-15 16:42:13,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:42:13,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:13,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:42:13,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:42:13,329 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-10-15 16:42:13,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:13,546 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-10-15 16:42:13,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:42:13,547 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-15 16:42:13,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:13,547 INFO L225 Difference]: With dead ends: 58 [2020-10-15 16:42:13,548 INFO L226 Difference]: Without dead ends: 50 [2020-10-15 16:42:13,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:42:13,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-15 16:42:13,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-10-15 16:42:13,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-15 16:42:13,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-10-15 16:42:13,551 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-10-15 16:42:13,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:13,551 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-10-15 16:42:13,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:42:13,551 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-10-15 16:42:13,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:42:13,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:13,552 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:13,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:13,762 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:13,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:13,762 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-10-15 16:42:13,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:13,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533577285] [2020-10-15 16:42:13,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:13,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:13,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533577285] [2020-10-15 16:42:13,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827061584] [2020-10-15 16:42:13,812 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:13,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:42:13,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:13,898 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:42:13,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:13,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:13,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-15 16:42:13,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454878861] [2020-10-15 16:42:13,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:42:13,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:13,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:42:13,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:42:13,913 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-10-15 16:42:14,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:14,096 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-10-15 16:42:14,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:42:14,096 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-15 16:42:14,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:14,097 INFO L225 Difference]: With dead ends: 60 [2020-10-15 16:42:14,097 INFO L226 Difference]: Without dead ends: 55 [2020-10-15 16:42:14,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:42:14,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-15 16:42:14,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-10-15 16:42:14,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 16:42:14,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-15 16:42:14,101 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-10-15 16:42:14,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:14,101 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-15 16:42:14,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:42:14,101 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-15 16:42:14,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:42:14,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:14,102 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:14,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-15 16:42:14,311 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:14,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:14,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-10-15 16:42:14,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:14,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699018981] [2020-10-15 16:42:14,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:14,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:14,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:14,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699018981] [2020-10-15 16:42:14,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872131187] [2020-10-15 16:42:14,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:14,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:14,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:14,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:42:14,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:14,436 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:42:14,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:14,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:14,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 16:42:14,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681599869] [2020-10-15 16:42:14,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 16:42:14,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:14,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 16:42:14,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:42:14,447 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-10-15 16:42:14,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:14,622 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-10-15 16:42:14,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:42:14,622 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-15 16:42:14,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:14,623 INFO L225 Difference]: With dead ends: 54 [2020-10-15 16:42:14,623 INFO L226 Difference]: Without dead ends: 49 [2020-10-15 16:42:14,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:42:14,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-15 16:42:14,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-15 16:42:14,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-15 16:42:14,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-10-15 16:42:14,626 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-10-15 16:42:14,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:14,627 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-10-15 16:42:14,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 16:42:14,627 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-10-15 16:42:14,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:42:14,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:14,628 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:14,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-15 16:42:14,829 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:14,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:14,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-10-15 16:42:14,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:14,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456208971] [2020-10-15 16:42:14,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:14,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:14,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:14,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456208971] [2020-10-15 16:42:14,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984151698] [2020-10-15 16:42:14,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:14,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:42:14,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:14,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:42:14,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:14,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:14,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:14,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-15 16:42:14,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300242202] [2020-10-15 16:42:14,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:42:14,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:14,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:42:14,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:42:14,948 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-10-15 16:42:15,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:15,040 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-10-15 16:42:15,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:42:15,040 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-15 16:42:15,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:15,041 INFO L225 Difference]: With dead ends: 60 [2020-10-15 16:42:15,041 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 16:42:15,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:42:15,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 16:42:15,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-15 16:42:15,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 16:42:15,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-15 16:42:15,045 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-10-15 16:42:15,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:15,046 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-15 16:42:15,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:42:15,046 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-15 16:42:15,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:42:15,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:15,046 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:15,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-15 16:42:15,247 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:15,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:15,248 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-10-15 16:42:15,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:15,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201286857] [2020-10-15 16:42:15,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:15,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:15,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:15,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201286857] [2020-10-15 16:42:15,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871592547] [2020-10-15 16:42:15,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:15,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:42:15,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:15,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:42:15,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:15,373 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:15,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:15,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 16:42:15,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663880443] [2020-10-15 16:42:15,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 16:42:15,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:15,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 16:42:15,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:42:15,385 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-10-15 16:42:15,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:15,513 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-10-15 16:42:15,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:42:15,514 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-15 16:42:15,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:15,514 INFO L225 Difference]: With dead ends: 66 [2020-10-15 16:42:15,514 INFO L226 Difference]: Without dead ends: 60 [2020-10-15 16:42:15,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:42:15,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-15 16:42:15,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-15 16:42:15,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-15 16:42:15,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-15 16:42:15,518 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-10-15 16:42:15,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:15,518 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-15 16:42:15,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 16:42:15,518 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-15 16:42:15,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:42:15,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:15,519 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:15,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-15 16:42:15,728 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:15,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:15,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-10-15 16:42:15,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:15,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060979934] [2020-10-15 16:42:15,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:15,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:15,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:15,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060979934] [2020-10-15 16:42:15,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567565469] [2020-10-15 16:42:15,797 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:15,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:42:15,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:15,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:42:15,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:15,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:15,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:15,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-15 16:42:15,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961688286] [2020-10-15 16:42:15,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:42:15,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:15,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:42:15,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:42:15,879 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-10-15 16:42:16,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:16,028 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-10-15 16:42:16,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:42:16,028 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-15 16:42:16,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:16,029 INFO L225 Difference]: With dead ends: 67 [2020-10-15 16:42:16,030 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 16:42:16,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:42:16,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 16:42:16,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-10-15 16:42:16,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-15 16:42:16,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-10-15 16:42:16,034 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-10-15 16:42:16,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:16,034 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-10-15 16:42:16,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:42:16,034 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-10-15 16:42:16,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:42:16,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:16,035 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:16,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:16,245 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:16,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:16,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-10-15 16:42:16,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:16,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181982773] [2020-10-15 16:42:16,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:16,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:16,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:16,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181982773] [2020-10-15 16:42:16,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853514306] [2020-10-15 16:42:16,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:16,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:42:16,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:16,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:42:16,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:16,363 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:16,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:16,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:16,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 16:42:16,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155785977] [2020-10-15 16:42:16,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 16:42:16,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:16,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 16:42:16,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:42:16,374 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-10-15 16:42:16,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:16,570 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-10-15 16:42:16,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:42:16,571 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-15 16:42:16,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:16,572 INFO L225 Difference]: With dead ends: 69 [2020-10-15 16:42:16,572 INFO L226 Difference]: Without dead ends: 63 [2020-10-15 16:42:16,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:42:16,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-15 16:42:16,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-10-15 16:42:16,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 16:42:16,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-15 16:42:16,575 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-10-15 16:42:16,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:16,575 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-15 16:42:16,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 16:42:16,575 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-15 16:42:16,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:42:16,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:16,576 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:16,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:16,777 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:16,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:16,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-10-15 16:42:16,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:16,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917066740] [2020-10-15 16:42:16,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:16,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:16,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:16,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917066740] [2020-10-15 16:42:16,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627128416] [2020-10-15 16:42:16,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:16,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:16,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:42:16,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:16,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:16,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:16,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-15 16:42:16,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152279279] [2020-10-15 16:42:16,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:42:16,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:16,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:42:16,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:42:16,887 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-10-15 16:42:17,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:17,074 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-15 16:42:17,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:42:17,075 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-15 16:42:17,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:17,076 INFO L225 Difference]: With dead ends: 88 [2020-10-15 16:42:17,076 INFO L226 Difference]: Without dead ends: 82 [2020-10-15 16:42:17,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:42:17,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-15 16:42:17,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-10-15 16:42:17,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 16:42:17,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-10-15 16:42:17,079 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-10-15 16:42:17,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:17,080 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-10-15 16:42:17,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:42:17,080 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-10-15 16:42:17,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:42:17,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:17,080 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:17,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:17,281 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:17,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:17,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-10-15 16:42:17,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:17,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121219929] [2020-10-15 16:42:17,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:17,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:17,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:17,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121219929] [2020-10-15 16:42:17,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883442343] [2020-10-15 16:42:17,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:17,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:17,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:17,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:42:17,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:17,393 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:17,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:17,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:17,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 16:42:17,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446286597] [2020-10-15 16:42:17,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 16:42:17,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:17,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 16:42:17,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:42:17,407 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-10-15 16:42:17,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:17,642 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-10-15 16:42:17,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:42:17,642 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-15 16:42:17,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:17,643 INFO L225 Difference]: With dead ends: 69 [2020-10-15 16:42:17,643 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 16:42:17,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:42:17,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 16:42:17,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-10-15 16:42:17,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-15 16:42:17,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-15 16:42:17,646 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-15 16:42:17,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:17,647 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-15 16:42:17,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 16:42:17,647 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-15 16:42:17,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:42:17,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:17,648 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:17,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-15 16:42:17,848 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:17,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:17,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-10-15 16:42:17,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:17,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114083942] [2020-10-15 16:42:17,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:17,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:17,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114083942] [2020-10-15 16:42:17,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011034831] [2020-10-15 16:42:17,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:17,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:42:17,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:17,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:42:17,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:18,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:18,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:18,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-15 16:42:18,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584117067] [2020-10-15 16:42:18,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 16:42:18,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:18,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 16:42:18,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:42:18,007 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-10-15 16:42:18,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:18,147 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-10-15 16:42:18,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:42:18,147 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-15 16:42:18,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:18,148 INFO L225 Difference]: With dead ends: 74 [2020-10-15 16:42:18,148 INFO L226 Difference]: Without dead ends: 68 [2020-10-15 16:42:18,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:42:18,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-15 16:42:18,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-10-15 16:42:18,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-15 16:42:18,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-15 16:42:18,151 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-15 16:42:18,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:18,152 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-15 16:42:18,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 16:42:18,152 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-15 16:42:18,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:42:18,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:18,153 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:18,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-15 16:42:18,361 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:18,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:18,362 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-10-15 16:42:18,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:18,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114772096] [2020-10-15 16:42:18,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:18,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:18,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:18,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114772096] [2020-10-15 16:42:18,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484238161] [2020-10-15 16:42:18,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:18,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:42:18,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:18,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:42:18,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:18,509 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:18,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:18,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:18,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 16:42:18,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963144056] [2020-10-15 16:42:18,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:42:18,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:18,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:42:18,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:42:18,522 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-15 16:42:18,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:18,700 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-10-15 16:42:18,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:42:18,703 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 16:42:18,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:18,704 INFO L225 Difference]: With dead ends: 71 [2020-10-15 16:42:18,704 INFO L226 Difference]: Without dead ends: 65 [2020-10-15 16:42:18,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:42:18,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-15 16:42:18,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-10-15 16:42:18,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 16:42:18,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-15 16:42:18,707 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-15 16:42:18,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:18,707 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-15 16:42:18,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:42:18,707 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-15 16:42:18,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:42:18,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:18,708 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:18,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-15 16:42:18,909 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:18,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:18,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-10-15 16:42:18,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:18,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725272953] [2020-10-15 16:42:18,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:18,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:18,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:18,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725272953] [2020-10-15 16:42:18,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505272029] [2020-10-15 16:42:18,970 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:19,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:42:19,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:19,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:42:19,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:19,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:19,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:19,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-15 16:42:19,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154509177] [2020-10-15 16:42:19,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 16:42:19,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:19,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 16:42:19,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:42:19,031 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-15 16:42:19,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:19,198 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-10-15 16:42:19,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:42:19,199 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-15 16:42:19,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:19,200 INFO L225 Difference]: With dead ends: 68 [2020-10-15 16:42:19,200 INFO L226 Difference]: Without dead ends: 62 [2020-10-15 16:42:19,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:42:19,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-15 16:42:19,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-15 16:42:19,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-15 16:42:19,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-15 16:42:19,204 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-15 16:42:19,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:19,204 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-15 16:42:19,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 16:42:19,204 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-15 16:42:19,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:42:19,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:19,205 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:19,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-15 16:42:19,414 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:19,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:19,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-10-15 16:42:19,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:19,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397672848] [2020-10-15 16:42:19,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:19,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:19,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:19,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397672848] [2020-10-15 16:42:19,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005746166] [2020-10-15 16:42:19,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:19,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:42:19,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:19,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:42:19,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:19,548 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:19,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:19,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:19,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 16:42:19,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497017933] [2020-10-15 16:42:19,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:42:19,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:19,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:42:19,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:42:19,560 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-15 16:42:19,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:19,789 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-10-15 16:42:19,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:42:19,790 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 16:42:19,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:19,791 INFO L225 Difference]: With dead ends: 67 [2020-10-15 16:42:19,791 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 16:42:19,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:42:19,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 16:42:19,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-10-15 16:42:19,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 16:42:19,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-15 16:42:19,795 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-15 16:42:19,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:19,795 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-15 16:42:19,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:42:19,796 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-15 16:42:19,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:42:19,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:19,796 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:20,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-15 16:42:20,004 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:20,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:20,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-10-15 16:42:20,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:20,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198184151] [2020-10-15 16:42:20,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:20,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:20,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:20,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198184151] [2020-10-15 16:42:20,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497811529] [2020-10-15 16:42:20,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:20,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:20,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:42:20,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:20,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:20,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:20,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-15 16:42:20,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085840752] [2020-10-15 16:42:20,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 16:42:20,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:20,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 16:42:20,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:42:20,127 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-15 16:42:20,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:20,323 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-15 16:42:20,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:42:20,324 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-15 16:42:20,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:20,325 INFO L225 Difference]: With dead ends: 83 [2020-10-15 16:42:20,325 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 16:42:20,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:42:20,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 16:42:20,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-10-15 16:42:20,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 16:42:20,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-10-15 16:42:20,329 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-10-15 16:42:20,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:20,329 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-10-15 16:42:20,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 16:42:20,329 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-10-15 16:42:20,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:42:20,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:20,330 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:20,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:20,540 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:20,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:20,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-10-15 16:42:20,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:20,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312278038] [2020-10-15 16:42:20,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:20,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:20,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:20,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312278038] [2020-10-15 16:42:20,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288819829] [2020-10-15 16:42:20,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:20,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:20,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:20,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:42:20,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:20,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:20,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 16:42:20,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582930950] [2020-10-15 16:42:20,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:42:20,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:20,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:42:20,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:42:20,723 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-10-15 16:42:20,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:20,963 INFO L93 Difference]: Finished difference Result 62 states and 149 transitions. [2020-10-15 16:42:20,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:42:20,964 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 16:42:20,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:20,965 INFO L225 Difference]: With dead ends: 62 [2020-10-15 16:42:20,965 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 16:42:20,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:42:20,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 16:42:20,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-10-15 16:42:20,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-15 16:42:20,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-10-15 16:42:20,967 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-10-15 16:42:20,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:20,968 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-10-15 16:42:20,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:42:20,968 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-10-15 16:42:20,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:42:20,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:20,968 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:21,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-15 16:42:21,176 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:21,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:21,176 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-10-15 16:42:21,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:21,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669350195] [2020-10-15 16:42:21,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:21,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:21,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669350195] [2020-10-15 16:42:21,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185822289] [2020-10-15 16:42:21,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:21,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:42:21,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:21,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:42:21,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:21,292 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:42:21,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:21,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:21,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 16:42:21,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998809623] [2020-10-15 16:42:21,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:42:21,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:21,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:42:21,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:42:21,307 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-10-15 16:42:21,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:21,567 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-10-15 16:42:21,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:42:21,568 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 16:42:21,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:21,568 INFO L225 Difference]: With dead ends: 68 [2020-10-15 16:42:21,568 INFO L226 Difference]: Without dead ends: 63 [2020-10-15 16:42:21,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:42:21,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-15 16:42:21,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-10-15 16:42:21,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 16:42:21,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-15 16:42:21,573 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-10-15 16:42:21,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:21,573 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-15 16:42:21,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:42:21,573 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-15 16:42:21,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:42:21,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:21,574 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:21,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-15 16:42:21,782 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:21,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:21,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-10-15 16:42:21,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:21,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111434194] [2020-10-15 16:42:21,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:21,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:21,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:21,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111434194] [2020-10-15 16:42:21,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563610351] [2020-10-15 16:42:21,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:21,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:42:21,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:21,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:42:21,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:21,907 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:42:21,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:21,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:21,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 16:42:21,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111219776] [2020-10-15 16:42:21,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:42:21,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:21,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:42:21,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:42:21,922 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-10-15 16:42:22,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:22,200 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-10-15 16:42:22,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:42:22,203 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 16:42:22,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:22,204 INFO L225 Difference]: With dead ends: 60 [2020-10-15 16:42:22,204 INFO L226 Difference]: Without dead ends: 55 [2020-10-15 16:42:22,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:42:22,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-15 16:42:22,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-10-15 16:42:22,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 16:42:22,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-10-15 16:42:22,207 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-10-15 16:42:22,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:22,207 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-10-15 16:42:22,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:42:22,207 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-10-15 16:42:22,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:42:22,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:22,208 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:22,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:22,417 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:22,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:22,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-10-15 16:42:22,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:22,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709258265] [2020-10-15 16:42:22,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:22,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:22,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:22,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709258265] [2020-10-15 16:42:22,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276506675] [2020-10-15 16:42:22,495 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:22,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 16:42:22,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:22,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:42:22,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:22,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:22,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:22,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-15 16:42:22,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529549839] [2020-10-15 16:42:22,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:42:22,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:22,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:42:22,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:42:22,547 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-10-15 16:42:22,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:22,679 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-10-15 16:42:22,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:42:22,680 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-15 16:42:22,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:22,680 INFO L225 Difference]: With dead ends: 66 [2020-10-15 16:42:22,680 INFO L226 Difference]: Without dead ends: 60 [2020-10-15 16:42:22,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:42:22,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-15 16:42:22,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-10-15 16:42:22,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 16:42:22,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-10-15 16:42:22,683 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-10-15 16:42:22,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:22,683 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-10-15 16:42:22,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:42:22,684 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-10-15 16:42:22,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:42:22,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:22,684 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:22,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:22,892 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:22,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:22,892 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-10-15 16:42:22,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:22,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252304834] [2020-10-15 16:42:22,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:22,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:22,972 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:22,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252304834] [2020-10-15 16:42:22,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338325571] [2020-10-15 16:42:22,972 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:23,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 16:42:23,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:23,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:42:23,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:23,026 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:23,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:23,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:23,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 16:42:23,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655477078] [2020-10-15 16:42:23,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:42:23,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:23,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:42:23,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:42:23,047 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-10-15 16:42:23,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:23,224 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-10-15 16:42:23,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:42:23,225 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 16:42:23,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:23,226 INFO L225 Difference]: With dead ends: 74 [2020-10-15 16:42:23,226 INFO L226 Difference]: Without dead ends: 68 [2020-10-15 16:42:23,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:42:23,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-15 16:42:23,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-10-15 16:42:23,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-15 16:42:23,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-10-15 16:42:23,230 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-10-15 16:42:23,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:23,230 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-10-15 16:42:23,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:42:23,230 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-10-15 16:42:23,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:42:23,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:23,231 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:23,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-15 16:42:23,439 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:23,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:23,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-10-15 16:42:23,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:23,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649442355] [2020-10-15 16:42:23,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:23,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:23,526 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:23,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649442355] [2020-10-15 16:42:23,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858284293] [2020-10-15 16:42:23,527 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:23,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:23,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:42:23,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:23,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:23,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:23,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-15 16:42:23,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773071968] [2020-10-15 16:42:23,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:42:23,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:23,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:42:23,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:42:23,585 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-10-15 16:42:23,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:23,772 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-10-15 16:42:23,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:42:23,773 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-15 16:42:23,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:23,773 INFO L225 Difference]: With dead ends: 75 [2020-10-15 16:42:23,773 INFO L226 Difference]: Without dead ends: 69 [2020-10-15 16:42:23,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:42:23,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-15 16:42:23,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-10-15 16:42:23,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-15 16:42:23,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-15 16:42:23,776 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-10-15 16:42:23,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:23,776 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-15 16:42:23,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:42:23,776 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-15 16:42:23,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:42:23,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:23,777 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:23,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:23,983 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:23,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:23,984 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-10-15 16:42:23,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:23,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325091334] [2020-10-15 16:42:23,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:23,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:24,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:24,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325091334] [2020-10-15 16:42:24,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643045976] [2020-10-15 16:42:24,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:24,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:24,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:24,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:42:24,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:24,140 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:24,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:24,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:24,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 16:42:24,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220609970] [2020-10-15 16:42:24,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:42:24,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:24,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:42:24,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:42:24,152 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-10-15 16:42:24,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:24,384 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-10-15 16:42:24,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:42:24,385 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 16:42:24,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:24,386 INFO L225 Difference]: With dead ends: 79 [2020-10-15 16:42:24,386 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 16:42:24,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:42:24,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 16:42:24,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-10-15 16:42:24,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 16:42:24,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-15 16:42:24,389 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-10-15 16:42:24,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:24,389 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-15 16:42:24,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:42:24,389 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-15 16:42:24,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:42:24,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:24,390 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:24,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-15 16:42:24,598 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:24,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:24,599 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-10-15 16:42:24,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:24,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001339527] [2020-10-15 16:42:24,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:24,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:24,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:24,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001339527] [2020-10-15 16:42:24,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91796885] [2020-10-15 16:42:24,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:24,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:42:24,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:24,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:42:24,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:24,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:24,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:24,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-15 16:42:24,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731269693] [2020-10-15 16:42:24,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:42:24,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:24,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:42:24,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:42:24,794 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-10-15 16:42:25,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:25,091 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-10-15 16:42:25,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:42:25,091 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-15 16:42:25,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:25,092 INFO L225 Difference]: With dead ends: 79 [2020-10-15 16:42:25,092 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 16:42:25,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:42:25,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 16:42:25,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-10-15 16:42:25,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-15 16:42:25,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-10-15 16:42:25,096 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-10-15 16:42:25,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:25,096 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-10-15 16:42:25,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:42:25,096 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-10-15 16:42:25,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:42:25,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:25,097 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:25,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:25,304 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:25,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:25,305 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-10-15 16:42:25,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:25,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040646299] [2020-10-15 16:42:25,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:25,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:25,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:25,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040646299] [2020-10-15 16:42:25,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817507475] [2020-10-15 16:42:25,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:25,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:42:25,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:25,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:42:25,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:25,497 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:25,510 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:25,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:25,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 16:42:25,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411626236] [2020-10-15 16:42:25,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:42:25,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:25,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:42:25,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:42:25,513 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-10-15 16:42:25,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:25,902 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-10-15 16:42:25,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:42:25,903 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 16:42:25,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:25,904 INFO L225 Difference]: With dead ends: 76 [2020-10-15 16:42:25,904 INFO L226 Difference]: Without dead ends: 70 [2020-10-15 16:42:25,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:42:25,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-15 16:42:25,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-10-15 16:42:25,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 16:42:25,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-15 16:42:25,908 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-10-15 16:42:25,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:25,909 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-15 16:42:25,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:42:25,909 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-15 16:42:25,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:42:25,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:25,910 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:26,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-15 16:42:26,119 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:26,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:26,120 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-10-15 16:42:26,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:26,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250454949] [2020-10-15 16:42:26,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:26,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:26,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:26,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250454949] [2020-10-15 16:42:26,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895728602] [2020-10-15 16:42:26,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:26,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 16:42:26,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:26,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:42:26,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:26,330 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:26,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:26,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-15 16:42:26,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398814439] [2020-10-15 16:42:26,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:42:26,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:26,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:42:26,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:42:26,333 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-10-15 16:42:26,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:26,654 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-10-15 16:42:26,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:42:26,655 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-15 16:42:26,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:26,655 INFO L225 Difference]: With dead ends: 96 [2020-10-15 16:42:26,656 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 16:42:26,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:42:26,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 16:42:26,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-10-15 16:42:26,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 16:42:26,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-10-15 16:42:26,659 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-10-15 16:42:26,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:26,659 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-10-15 16:42:26,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:42:26,659 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-10-15 16:42:26,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:42:26,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:26,659 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:26,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-15 16:42:26,866 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:26,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:26,867 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-10-15 16:42:26,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:26,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484256447] [2020-10-15 16:42:26,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:26,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:26,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:26,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484256447] [2020-10-15 16:42:26,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456024978] [2020-10-15 16:42:26,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:27,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 16:42:27,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:27,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:42:27,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:27,054 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:27,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:27,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:27,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 16:42:27,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003715059] [2020-10-15 16:42:27,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:42:27,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:27,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:42:27,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:42:27,064 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-10-15 16:42:27,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:27,373 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-10-15 16:42:27,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:42:27,373 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 16:42:27,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:27,374 INFO L225 Difference]: With dead ends: 77 [2020-10-15 16:42:27,374 INFO L226 Difference]: Without dead ends: 69 [2020-10-15 16:42:27,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:42:27,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-15 16:42:27,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-10-15 16:42:27,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-15 16:42:27,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-15 16:42:27,377 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-15 16:42:27,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:27,377 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-15 16:42:27,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:42:27,378 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-15 16:42:27,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 16:42:27,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:27,378 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:27,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-15 16:42:27,586 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:27,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:27,587 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-10-15 16:42:27,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:27,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757406651] [2020-10-15 16:42:27,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:27,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:27,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:27,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757406651] [2020-10-15 16:42:27,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560771697] [2020-10-15 16:42:27,724 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:27,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:27,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:42:27,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:27,807 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:27,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:27,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-15 16:42:27,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675964401] [2020-10-15 16:42:27,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:42:27,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:27,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:42:27,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:42:27,809 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-10-15 16:42:28,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:28,032 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-15 16:42:28,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:42:28,033 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-15 16:42:28,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:28,034 INFO L225 Difference]: With dead ends: 84 [2020-10-15 16:42:28,034 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 16:42:28,035 INFO L677 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 [2020-10-15 16:42:28,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 16:42:28,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-10-15 16:42:28,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 16:42:28,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-15 16:42:28,038 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-15 16:42:28,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:28,038 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-15 16:42:28,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:42:28,039 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-15 16:42:28,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 16:42:28,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:28,039 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:28,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-15 16:42:28,251 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:28,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:28,252 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-10-15 16:42:28,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:28,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620459471] [2020-10-15 16:42:28,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:28,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:28,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:28,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620459471] [2020-10-15 16:42:28,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851756958] [2020-10-15 16:42:28,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:28,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:28,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:28,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:42:28,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:28,462 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:28,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:28,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 16:42:28,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952212253] [2020-10-15 16:42:28,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:42:28,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:28,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:42:28,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:42:28,474 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-15 16:42:28,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:28,687 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-10-15 16:42:28,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:42:28,687 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 16:42:28,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:28,688 INFO L225 Difference]: With dead ends: 81 [2020-10-15 16:42:28,688 INFO L226 Difference]: Without dead ends: 75 [2020-10-15 16:42:28,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:42:28,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-15 16:42:28,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-10-15 16:42:28,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 16:42:28,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-15 16:42:28,691 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-15 16:42:28,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:28,691 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-15 16:42:28,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:42:28,692 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-15 16:42:28,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 16:42:28,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:28,692 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:28,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-15 16:42:28,900 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:28,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:28,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-10-15 16:42:28,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:28,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343226139] [2020-10-15 16:42:28,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:28,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:29,019 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:29,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343226139] [2020-10-15 16:42:29,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641520287] [2020-10-15 16:42:29,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:29,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:42:29,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:29,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:42:29,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:29,102 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:29,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:29,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-15 16:42:29,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742892026] [2020-10-15 16:42:29,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:42:29,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:29,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:42:29,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:42:29,104 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-15 16:42:29,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:29,398 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-15 16:42:29,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:42:29,399 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-15 16:42:29,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:29,400 INFO L225 Difference]: With dead ends: 78 [2020-10-15 16:42:29,400 INFO L226 Difference]: Without dead ends: 72 [2020-10-15 16:42:29,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:42:29,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-15 16:42:29,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-10-15 16:42:29,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 16:42:29,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-15 16:42:29,405 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-15 16:42:29,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:29,405 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-15 16:42:29,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:42:29,406 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-15 16:42:29,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 16:42:29,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:29,406 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:29,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-15 16:42:29,620 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:29,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:29,621 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-10-15 16:42:29,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:29,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040748367] [2020-10-15 16:42:29,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:29,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:29,714 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:29,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040748367] [2020-10-15 16:42:29,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654390102] [2020-10-15 16:42:29,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:29,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:42:29,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:29,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:42:29,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:29,776 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:29,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:29,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:29,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 16:42:29,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118616457] [2020-10-15 16:42:29,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:42:29,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:29,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:42:29,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:42:29,790 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-15 16:42:30,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:30,102 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-15 16:42:30,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:42:30,103 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 16:42:30,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:30,104 INFO L225 Difference]: With dead ends: 77 [2020-10-15 16:42:30,104 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 16:42:30,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:42:30,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 16:42:30,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-10-15 16:42:30,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 16:42:30,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-15 16:42:30,108 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-15 16:42:30,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:30,108 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-15 16:42:30,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:42:30,109 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-15 16:42:30,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 16:42:30,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:30,109 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:30,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-15 16:42:30,320 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:30,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:30,320 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-10-15 16:42:30,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:30,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661225797] [2020-10-15 16:42:30,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:30,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:30,394 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:30,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661225797] [2020-10-15 16:42:30,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917295505] [2020-10-15 16:42:30,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:30,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 16:42:30,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:30,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:42:30,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:30,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:30,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:30,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-15 16:42:30,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063024199] [2020-10-15 16:42:30,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:42:30,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:30,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:42:30,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:42:30,467 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-15 16:42:30,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:30,715 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-10-15 16:42:30,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:42:30,716 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-15 16:42:30,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:30,716 INFO L225 Difference]: With dead ends: 74 [2020-10-15 16:42:30,717 INFO L226 Difference]: Without dead ends: 68 [2020-10-15 16:42:30,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:42:30,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-15 16:42:30,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-10-15 16:42:30,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 16:42:30,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-15 16:42:30,720 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-15 16:42:30,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:30,721 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-15 16:42:30,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:42:30,721 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-15 16:42:30,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 16:42:30,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:30,721 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:30,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:30,931 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:30,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:30,931 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-10-15 16:42:30,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:30,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046656122] [2020-10-15 16:42:30,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:30,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:31,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:31,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046656122] [2020-10-15 16:42:31,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803920699] [2020-10-15 16:42:31,005 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:31,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 16:42:31,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:31,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:42:31,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:31,065 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:31,084 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:31,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:31,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 16:42:31,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511498254] [2020-10-15 16:42:31,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:42:31,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:31,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:42:31,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:42:31,086 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-15 16:42:31,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:31,440 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-10-15 16:42:31,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:42:31,445 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 16:42:31,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:31,446 INFO L225 Difference]: With dead ends: 73 [2020-10-15 16:42:31,446 INFO L226 Difference]: Without dead ends: 67 [2020-10-15 16:42:31,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:42:31,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-15 16:42:31,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-10-15 16:42:31,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 16:42:31,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-15 16:42:31,450 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-15 16:42:31,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:31,450 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-15 16:42:31,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:42:31,451 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-15 16:42:31,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 16:42:31,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:31,451 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:31,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-15 16:42:31,652 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:31,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:31,653 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-10-15 16:42:31,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:31,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921036521] [2020-10-15 16:42:31,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:31,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:31,719 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:31,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921036521] [2020-10-15 16:42:31,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276469270] [2020-10-15 16:42:31,720 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:31,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:31,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:42:31,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:31,803 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:31,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:31,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-15 16:42:31,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031967871] [2020-10-15 16:42:31,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:42:31,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:31,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:42:31,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:42:31,805 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-15 16:42:32,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:32,088 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-15 16:42:32,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:42:32,088 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-15 16:42:32,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:32,089 INFO L225 Difference]: With dead ends: 89 [2020-10-15 16:42:32,090 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 16:42:32,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:42:32,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 16:42:32,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-15 16:42:32,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-15 16:42:32,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-10-15 16:42:32,096 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-10-15 16:42:32,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:32,096 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-10-15 16:42:32,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:42:32,096 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-10-15 16:42:32,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 16:42:32,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:32,097 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:32,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:32,307 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:32,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:32,307 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-10-15 16:42:32,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:32,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016762582] [2020-10-15 16:42:32,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:32,395 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:32,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016762582] [2020-10-15 16:42:32,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125282713] [2020-10-15 16:42:32,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:32,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:32,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:32,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:42:32,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:32,463 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:32,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:32,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:32,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 16:42:32,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536054918] [2020-10-15 16:42:32,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:42:32,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:32,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:42:32,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:42:32,474 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-10-15 16:42:32,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:32,856 INFO L93 Difference]: Finished difference Result 70 states and 169 transitions. [2020-10-15 16:42:32,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:42:32,857 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 16:42:32,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:32,858 INFO L225 Difference]: With dead ends: 70 [2020-10-15 16:42:32,858 INFO L226 Difference]: Without dead ends: 62 [2020-10-15 16:42:32,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:42:32,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-15 16:42:32,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-10-15 16:42:32,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-15 16:42:32,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-10-15 16:42:32,861 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-10-15 16:42:32,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:32,861 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-10-15 16:42:32,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:42:32,862 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-10-15 16:42:32,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 16:42:32,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:32,862 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:33,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-15 16:42:33,070 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:33,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:33,070 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-10-15 16:42:33,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:33,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414338009] [2020-10-15 16:42:33,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:33,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:33,141 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:33,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414338009] [2020-10-15 16:42:33,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638365717] [2020-10-15 16:42:33,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:33,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:42:33,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:33,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:42:33,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:33,205 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:42:33,214 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:33,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:33,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 16:42:33,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832369040] [2020-10-15 16:42:33,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:42:33,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:33,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:42:33,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:42:33,216 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-10-15 16:42:33,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:33,568 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-10-15 16:42:33,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:42:33,568 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 16:42:33,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:33,569 INFO L225 Difference]: With dead ends: 76 [2020-10-15 16:42:33,569 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 16:42:33,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:42:33,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 16:42:33,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-10-15 16:42:33,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 16:42:33,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-15 16:42:33,572 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-10-15 16:42:33,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:33,572 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-15 16:42:33,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:42:33,572 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-15 16:42:33,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:42:33,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:33,573 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:33,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:33,780 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:33,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:33,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-10-15 16:42:33,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:33,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548092489] [2020-10-15 16:42:33,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:33,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:33,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548092489] [2020-10-15 16:42:33,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326139075] [2020-10-15 16:42:33,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:33,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:42:33,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:33,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:42:33,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:33,947 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:42:33,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:33,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:33,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 16:42:33,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209884779] [2020-10-15 16:42:33,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:42:33,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:33,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:42:33,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:42:33,961 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-10-15 16:42:34,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:34,337 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-10-15 16:42:34,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:42:34,337 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 16:42:34,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:34,338 INFO L225 Difference]: With dead ends: 66 [2020-10-15 16:42:34,338 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 16:42:34,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:42:34,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 16:42:34,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-10-15 16:42:34,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 16:42:34,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-10-15 16:42:34,343 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-10-15 16:42:34,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:34,343 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-10-15 16:42:34,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:42:34,344 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-10-15 16:42:34,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:42:34,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:34,344 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:34,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-15 16:42:34,553 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:34,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:34,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-10-15 16:42:34,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:34,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821609088] [2020-10-15 16:42:34,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:34,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:34,652 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:34,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821609088] [2020-10-15 16:42:34,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581466805] [2020-10-15 16:42:34,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:34,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 16:42:34,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:34,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:42:34,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:34,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:34,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:34,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 16:42:34,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376120517] [2020-10-15 16:42:34,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:42:34,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:34,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:42:34,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:42:34,712 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-10-15 16:42:34,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:34,875 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-10-15 16:42:34,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:42:34,876 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 16:42:34,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:34,877 INFO L225 Difference]: With dead ends: 72 [2020-10-15 16:42:34,877 INFO L226 Difference]: Without dead ends: 66 [2020-10-15 16:42:34,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:42:34,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-15 16:42:34,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-15 16:42:34,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 16:42:34,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-10-15 16:42:34,880 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-10-15 16:42:34,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:34,880 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-10-15 16:42:34,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:42:34,881 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-10-15 16:42:34,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:42:34,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:34,881 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:35,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-15 16:42:35,085 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:35,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:35,085 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-10-15 16:42:35,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:35,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995265382] [2020-10-15 16:42:35,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:35,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:35,243 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:35,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995265382] [2020-10-15 16:42:35,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755854987] [2020-10-15 16:42:35,244 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:35,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-15 16:42:35,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:35,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:42:35,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:35,332 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:35,345 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:35,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:35,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 16:42:35,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320755313] [2020-10-15 16:42:35,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:42:35,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:35,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:42:35,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:42:35,347 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-10-15 16:42:35,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:35,626 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-10-15 16:42:35,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:42:35,626 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 16:42:35,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:35,627 INFO L225 Difference]: With dead ends: 82 [2020-10-15 16:42:35,628 INFO L226 Difference]: Without dead ends: 76 [2020-10-15 16:42:35,628 INFO L677 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 [2020-10-15 16:42:35,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-15 16:42:35,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-10-15 16:42:35,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 16:42:35,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-10-15 16:42:35,631 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-10-15 16:42:35,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:35,632 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-10-15 16:42:35,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:42:35,632 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-10-15 16:42:35,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:42:35,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:35,633 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:35,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-15 16:42:35,845 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:35,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:35,845 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-10-15 16:42:35,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:35,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408932937] [2020-10-15 16:42:35,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:35,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:35,969 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:35,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408932937] [2020-10-15 16:42:35,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084876381] [2020-10-15 16:42:35,970 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:36,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:36,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:42:36,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:36,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:36,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 16:42:36,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637864722] [2020-10-15 16:42:36,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:42:36,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:36,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:42:36,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:42:36,026 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-10-15 16:42:36,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:36,252 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-10-15 16:42:36,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:42:36,252 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 16:42:36,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:36,254 INFO L225 Difference]: With dead ends: 83 [2020-10-15 16:42:36,254 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 16:42:36,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:42:36,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 16:42:36,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-10-15 16:42:36,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-15 16:42:36,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-10-15 16:42:36,257 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-10-15 16:42:36,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:36,257 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-10-15 16:42:36,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:42:36,257 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-10-15 16:42:36,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:42:36,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:36,258 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:36,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-15 16:42:36,461 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:36,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:36,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-10-15 16:42:36,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:36,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051486381] [2020-10-15 16:42:36,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:36,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:36,559 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:36,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051486381] [2020-10-15 16:42:36,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824311835] [2020-10-15 16:42:36,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:36,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:36,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:36,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:42:36,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:36,628 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:36,638 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:36,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:36,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 16:42:36,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078468622] [2020-10-15 16:42:36,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:42:36,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:36,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:42:36,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:42:36,643 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-10-15 16:42:36,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:36,905 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-10-15 16:42:36,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:42:36,909 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 16:42:36,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:36,909 INFO L225 Difference]: With dead ends: 89 [2020-10-15 16:42:36,909 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 16:42:36,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:42:36,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 16:42:36,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-10-15 16:42:36,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 16:42:36,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-10-15 16:42:36,912 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-10-15 16:42:36,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:36,912 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-10-15 16:42:36,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:42:36,912 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-10-15 16:42:36,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:42:36,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:36,913 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:37,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:37,120 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:37,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:37,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-10-15 16:42:37,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:37,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682180254] [2020-10-15 16:42:37,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:37,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:37,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:37,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682180254] [2020-10-15 16:42:37,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285060104] [2020-10-15 16:42:37,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:37,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-15 16:42:37,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:37,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:42:37,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:37,275 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:37,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:37,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 16:42:37,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028732742] [2020-10-15 16:42:37,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:42:37,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:37,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:42:37,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:42:37,277 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-10-15 16:42:37,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:37,557 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-10-15 16:42:37,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:42:37,558 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 16:42:37,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:37,559 INFO L225 Difference]: With dead ends: 89 [2020-10-15 16:42:37,559 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 16:42:37,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:42:37,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 16:42:37,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-10-15 16:42:37,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 16:42:37,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-15 16:42:37,563 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-10-15 16:42:37,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:37,563 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-15 16:42:37,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:42:37,563 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-15 16:42:37,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:42:37,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:37,564 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:37,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:37,773 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:37,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:37,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-10-15 16:42:37,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:37,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935129980] [2020-10-15 16:42:37,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:37,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:37,859 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:37,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935129980] [2020-10-15 16:42:37,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317300149] [2020-10-15 16:42:37,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:37,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:42:37,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:37,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:42:37,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:37,943 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:37,956 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:37,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:37,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 16:42:37,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114770808] [2020-10-15 16:42:37,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:42:37,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:37,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:42:37,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:42:37,957 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-10-15 16:42:38,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:38,308 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-10-15 16:42:38,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:42:38,309 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 16:42:38,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:38,310 INFO L225 Difference]: With dead ends: 86 [2020-10-15 16:42:38,310 INFO L226 Difference]: Without dead ends: 80 [2020-10-15 16:42:38,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:42:38,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-15 16:42:38,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-10-15 16:42:38,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 16:42:38,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-15 16:42:38,314 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-10-15 16:42:38,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:38,314 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-15 16:42:38,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:42:38,314 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-15 16:42:38,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:42:38,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:38,315 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:38,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-15 16:42:38,519 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:38,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:38,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-10-15 16:42:38,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:38,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841347571] [2020-10-15 16:42:38,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:38,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:38,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841347571] [2020-10-15 16:42:38,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443377840] [2020-10-15 16:42:38,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:38,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 16:42:38,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:38,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:42:38,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:38,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:38,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:38,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 16:42:38,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322244093] [2020-10-15 16:42:38,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:42:38,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:38,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:42:38,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:42:38,657 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-10-15 16:42:38,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:38,964 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-10-15 16:42:38,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:42:38,965 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 16:42:38,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:38,966 INFO L225 Difference]: With dead ends: 87 [2020-10-15 16:42:38,966 INFO L226 Difference]: Without dead ends: 81 [2020-10-15 16:42:38,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:42:38,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-15 16:42:38,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-10-15 16:42:38,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-15 16:42:38,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-10-15 16:42:38,968 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-10-15 16:42:38,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:38,968 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-10-15 16:42:38,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:42:38,969 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-10-15 16:42:38,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:42:38,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:38,969 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:39,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:39,170 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:39,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:39,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-10-15 16:42:39,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:39,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454770004] [2020-10-15 16:42:39,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:39,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:39,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:39,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454770004] [2020-10-15 16:42:39,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657343465] [2020-10-15 16:42:39,252 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:39,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-15 16:42:39,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:39,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:42:39,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:39,333 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:39,345 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:39,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:39,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 16:42:39,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972103369] [2020-10-15 16:42:39,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:42:39,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:39,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:42:39,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:42:39,347 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-10-15 16:42:39,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:39,751 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-10-15 16:42:39,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:42:39,752 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 16:42:39,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:39,752 INFO L225 Difference]: With dead ends: 84 [2020-10-15 16:42:39,752 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 16:42:39,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:42:39,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 16:42:39,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-10-15 16:42:39,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 16:42:39,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-15 16:42:39,755 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-10-15 16:42:39,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:39,755 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-15 16:42:39,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:42:39,755 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-15 16:42:39,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:42:39,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:39,756 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:39,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-15 16:42:39,957 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:39,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:39,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-10-15 16:42:39,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:39,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90129854] [2020-10-15 16:42:39,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:39,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:40,035 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:40,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90129854] [2020-10-15 16:42:40,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380101050] [2020-10-15 16:42:40,035 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:40,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:40,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:42:40,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:40,096 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:40,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:40,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 16:42:40,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271753536] [2020-10-15 16:42:40,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:42:40,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:40,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:42:40,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:42:40,098 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-10-15 16:42:40,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:40,447 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-15 16:42:40,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:42:40,448 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 16:42:40,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:40,449 INFO L225 Difference]: With dead ends: 104 [2020-10-15 16:42:40,449 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 16:42:40,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:42:40,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 16:42:40,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-10-15 16:42:40,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 16:42:40,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-10-15 16:42:40,452 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-10-15 16:42:40,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:40,453 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-10-15 16:42:40,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:42:40,453 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-10-15 16:42:40,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:42:40,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:40,453 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:40,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-15 16:42:40,661 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:40,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:40,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-10-15 16:42:40,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:40,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25767984] [2020-10-15 16:42:40,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:40,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:40,734 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:40,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25767984] [2020-10-15 16:42:40,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090559987] [2020-10-15 16:42:40,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:40,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:40,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:40,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:42:40,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:40,791 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:40,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:40,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:40,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 16:42:40,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912260430] [2020-10-15 16:42:40,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:42:40,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:40,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:42:40,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:42:40,801 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-10-15 16:42:41,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:41,262 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-10-15 16:42:41,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:42:41,262 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 16:42:41,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:41,263 INFO L225 Difference]: With dead ends: 85 [2020-10-15 16:42:41,263 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 16:42:41,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:42:41,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 16:42:41,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-10-15 16:42:41,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-15 16:42:41,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-15 16:42:41,265 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-15 16:42:41,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:41,265 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-15 16:42:41,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:42:41,265 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-15 16:42:41,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:42:41,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:41,266 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:41,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-15 16:42:41,466 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:41,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:41,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-10-15 16:42:41,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:41,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170862445] [2020-10-15 16:42:41,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:41,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:41,588 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:41,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170862445] [2020-10-15 16:42:41,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851905043] [2020-10-15 16:42:41,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:41,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-15 16:42:41,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:41,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:42:41,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:41,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:41,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 16:42:41,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632856134] [2020-10-15 16:42:41,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:42:41,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:41,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:42:41,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:42:41,691 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-10-15 16:42:41,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:41,877 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-15 16:42:41,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:42:41,877 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 16:42:41,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:41,878 INFO L225 Difference]: With dead ends: 94 [2020-10-15 16:42:41,878 INFO L226 Difference]: Without dead ends: 88 [2020-10-15 16:42:41,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:42:41,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-15 16:42:41,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-10-15 16:42:41,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 16:42:41,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 16:42:41,880 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-15 16:42:41,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:41,881 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 16:42:41,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:42:41,881 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 16:42:41,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:42:41,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:41,882 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:42,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-15 16:42:42,089 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:42,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:42,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-10-15 16:42:42,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:42,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598354789] [2020-10-15 16:42:42,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:42,210 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:42,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598354789] [2020-10-15 16:42:42,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878406324] [2020-10-15 16:42:42,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:42,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:42:42,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:42,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:42:42,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:42,268 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:42,279 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:42,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:42,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 16:42:42,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317774305] [2020-10-15 16:42:42,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:42:42,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:42,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:42:42,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:42:42,280 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-15 16:42:42,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:42,538 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-10-15 16:42:42,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:42:42,538 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 16:42:42,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:42,539 INFO L225 Difference]: With dead ends: 91 [2020-10-15 16:42:42,539 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 16:42:42,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:42:42,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 16:42:42,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-15 16:42:42,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 16:42:42,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 16:42:42,543 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-15 16:42:42,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:42,544 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 16:42:42,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:42:42,544 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 16:42:42,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:42:42,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:42,545 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:42,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-15 16:42:42,751 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:42,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:42,751 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-10-15 16:42:42,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:42,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645450292] [2020-10-15 16:42:42,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:42,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:42,860 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:42,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645450292] [2020-10-15 16:42:42,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250735340] [2020-10-15 16:42:42,861 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:42,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 16:42:42,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:42,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:42:42,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:42,914 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:42,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:42,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 16:42:42,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442007009] [2020-10-15 16:42:42,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:42:42,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:42,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:42:42,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:42:42,915 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-15 16:42:43,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:43,172 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-15 16:42:43,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:42:43,173 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 16:42:43,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:43,174 INFO L225 Difference]: With dead ends: 88 [2020-10-15 16:42:43,174 INFO L226 Difference]: Without dead ends: 82 [2020-10-15 16:42:43,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:42:43,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-15 16:42:43,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-10-15 16:42:43,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 16:42:43,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 16:42:43,176 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-15 16:42:43,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:43,176 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 16:42:43,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:42:43,176 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 16:42:43,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:42:43,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:43,177 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:43,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:43,377 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:43,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:43,378 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-10-15 16:42:43,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:43,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211792057] [2020-10-15 16:42:43,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:43,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:43,476 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:43,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211792057] [2020-10-15 16:42:43,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191803452] [2020-10-15 16:42:43,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:43,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-15 16:42:43,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:43,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:42:43,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:43,561 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:43,570 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:43,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:43,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 16:42:43,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639404753] [2020-10-15 16:42:43,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:42:43,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:43,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:42:43,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:42:43,573 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-15 16:42:43,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:43,900 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-10-15 16:42:43,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:42:43,900 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 16:42:43,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:43,901 INFO L225 Difference]: With dead ends: 87 [2020-10-15 16:42:43,901 INFO L226 Difference]: Without dead ends: 81 [2020-10-15 16:42:43,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:42:43,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-15 16:42:43,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-10-15 16:42:43,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 16:42:43,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 16:42:43,904 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-15 16:42:43,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:43,904 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 16:42:43,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:42:43,904 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 16:42:43,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:42:43,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:43,905 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:44,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:44,105 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:44,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:44,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-10-15 16:42:44,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:44,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850676852] [2020-10-15 16:42:44,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:44,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:44,222 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:44,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850676852] [2020-10-15 16:42:44,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85529311] [2020-10-15 16:42:44,222 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:44,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:44,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:42:44,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:44,284 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:44,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:44,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 16:42:44,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918081147] [2020-10-15 16:42:44,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:42:44,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:44,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:42:44,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:42:44,286 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-15 16:42:44,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:44,573 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-15 16:42:44,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:42:44,574 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 16:42:44,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:44,575 INFO L225 Difference]: With dead ends: 84 [2020-10-15 16:42:44,575 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 16:42:44,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:42:44,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 16:42:44,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-10-15 16:42:44,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 16:42:44,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 16:42:44,577 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-15 16:42:44,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:44,577 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 16:42:44,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:42:44,577 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 16:42:44,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:42:44,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:44,578 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:44,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-10-15 16:42:44,779 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:44,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:44,780 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-10-15 16:42:44,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:44,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144038464] [2020-10-15 16:42:44,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:44,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:44,881 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:44,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144038464] [2020-10-15 16:42:44,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660781980] [2020-10-15 16:42:44,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:44,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:44,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:44,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:42:44,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:44,946 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:44,959 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:44,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:44,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 16:42:44,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038204542] [2020-10-15 16:42:44,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:42:44,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:44,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:42:44,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:42:44,961 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-15 16:42:45,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:45,371 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-15 16:42:45,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:42:45,372 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 16:42:45,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:45,373 INFO L225 Difference]: With dead ends: 83 [2020-10-15 16:42:45,373 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 16:42:45,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:42:45,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 16:42:45,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-10-15 16:42:45,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 16:42:45,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 16:42:45,376 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-15 16:42:45,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:45,377 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 16:42:45,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:42:45,377 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 16:42:45,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:42:45,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:45,377 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:45,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:45,586 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:45,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:45,586 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-10-15 16:42:45,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:45,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951270783] [2020-10-15 16:42:45,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:45,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:45,687 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:45,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951270783] [2020-10-15 16:42:45,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130481276] [2020-10-15 16:42:45,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:45,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-15 16:42:45,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:45,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:42:45,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:45,758 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:45,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:45,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 16:42:45,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586796735] [2020-10-15 16:42:45,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:42:45,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:45,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:42:45,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:42:45,759 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-15 16:42:46,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:46,102 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-10-15 16:42:46,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:42:46,103 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 16:42:46,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:46,104 INFO L225 Difference]: With dead ends: 80 [2020-10-15 16:42:46,104 INFO L226 Difference]: Without dead ends: 74 [2020-10-15 16:42:46,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:42:46,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-15 16:42:46,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-10-15 16:42:46,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 16:42:46,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 16:42:46,107 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-15 16:42:46,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:46,107 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 16:42:46,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:42:46,107 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 16:42:46,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:42:46,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:46,107 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:46,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-10-15 16:42:46,308 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:46,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:46,309 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-10-15 16:42:46,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:46,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9586591] [2020-10-15 16:42:46,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:46,398 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:46,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9586591] [2020-10-15 16:42:46,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564003198] [2020-10-15 16:42:46,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:46,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:42:46,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:46,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:42:46,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:46,469 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:46,479 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:46,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:46,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 16:42:46,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704142128] [2020-10-15 16:42:46,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:42:46,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:46,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:42:46,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:42:46,481 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-15 16:42:47,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:47,022 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-10-15 16:42:47,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:42:47,023 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 16:42:47,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:47,024 INFO L225 Difference]: With dead ends: 79 [2020-10-15 16:42:47,024 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 16:42:47,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:42:47,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 16:42:47,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-10-15 16:42:47,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 16:42:47,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 16:42:47,030 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-15 16:42:47,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:47,030 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 16:42:47,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:42:47,031 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 16:42:47,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:42:47,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:47,031 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:47,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:47,240 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:47,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:47,241 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-10-15 16:42:47,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:47,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115944489] [2020-10-15 16:42:47,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:47,347 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:47,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115944489] [2020-10-15 16:42:47,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801030470] [2020-10-15 16:42:47,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:47,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 16:42:47,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:47,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:42:47,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:47,406 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:47,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:47,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 16:42:47,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279129217] [2020-10-15 16:42:47,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:42:47,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:47,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:42:47,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:42:47,408 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-15 16:42:47,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:47,782 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-15 16:42:47,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:42:47,782 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 16:42:47,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:47,783 INFO L225 Difference]: With dead ends: 95 [2020-10-15 16:42:47,783 INFO L226 Difference]: Without dead ends: 89 [2020-10-15 16:42:47,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:42:47,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-15 16:42:47,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-10-15 16:42:47,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 16:42:47,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-10-15 16:42:47,786 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-10-15 16:42:47,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:47,786 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-10-15 16:42:47,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:42:47,786 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-10-15 16:42:47,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:42:47,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:47,786 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:47,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-10-15 16:42:47,987 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:47,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:47,988 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-10-15 16:42:47,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:47,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997790870] [2020-10-15 16:42:47,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:47,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:48,076 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:48,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997790870] [2020-10-15 16:42:48,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119947807] [2020-10-15 16:42:48,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:48,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-15 16:42:48,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:48,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:42:48,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:48,136 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:48,148 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:48,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:48,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 16:42:48,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491028902] [2020-10-15 16:42:48,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:42:48,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:48,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:42:48,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:42:48,150 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-10-15 16:42:48,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:48,663 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-10-15 16:42:48,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:42:48,664 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 16:42:48,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:48,665 INFO L225 Difference]: With dead ends: 76 [2020-10-15 16:42:48,665 INFO L226 Difference]: Without dead ends: 68 [2020-10-15 16:42:48,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:42:48,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-15 16:42:48,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-10-15 16:42:48,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-15 16:42:48,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-10-15 16:42:48,668 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-10-15 16:42:48,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:48,669 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-10-15 16:42:48,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:42:48,669 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-10-15 16:42:48,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:42:48,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:48,669 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:48,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:48,877 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:48,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:48,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-10-15 16:42:48,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:48,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120898816] [2020-10-15 16:42:48,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:48,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:48,990 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:48,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120898816] [2020-10-15 16:42:48,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108247516] [2020-10-15 16:42:48,991 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:49,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:49,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:42:49,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:49,099 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:42:49,114 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:49,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:49,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 16:42:49,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480239206] [2020-10-15 16:42:49,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:42:49,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:49,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:42:49,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:42:49,116 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-10-15 16:42:49,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:49,669 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-10-15 16:42:49,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:42:49,670 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 16:42:49,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:49,670 INFO L225 Difference]: With dead ends: 84 [2020-10-15 16:42:49,670 INFO L226 Difference]: Without dead ends: 79 [2020-10-15 16:42:49,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:42:49,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-15 16:42:49,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-10-15 16:42:49,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 16:42:49,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-15 16:42:49,673 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-10-15 16:42:49,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:49,673 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-15 16:42:49,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:42:49,673 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-15 16:42:49,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:42:49,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:49,674 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:49,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-15 16:42:49,881 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:49,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:49,882 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-10-15 16:42:49,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:49,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991515087] [2020-10-15 16:42:49,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:49,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:50,010 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:50,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991515087] [2020-10-15 16:42:50,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719748365] [2020-10-15 16:42:50,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:50,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:50,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:50,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:42:50,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:50,121 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:42:50,137 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:50,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:50,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 16:42:50,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476238954] [2020-10-15 16:42:50,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:42:50,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:50,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:42:50,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:42:50,139 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-10-15 16:42:50,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:50,665 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-10-15 16:42:50,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:42:50,665 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 16:42:50,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:50,666 INFO L225 Difference]: With dead ends: 72 [2020-10-15 16:42:50,666 INFO L226 Difference]: Without dead ends: 67 [2020-10-15 16:42:50,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:42:50,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-15 16:42:50,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-10-15 16:42:50,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 16:42:50,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-10-15 16:42:50,669 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-10-15 16:42:50,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:50,670 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-10-15 16:42:50,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:42:50,670 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-10-15 16:42:50,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:42:50,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:50,670 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:50,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-15 16:42:50,879 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:50,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:50,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-10-15 16:42:50,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:50,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341148702] [2020-10-15 16:42:50,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:50,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:51,007 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:51,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341148702] [2020-10-15 16:42:51,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64181503] [2020-10-15 16:42:51,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:51,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 16:42:51,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:51,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:42:51,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:51,083 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:51,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:51,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 16:42:51,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656732849] [2020-10-15 16:42:51,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:42:51,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:51,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:42:51,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:42:51,085 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-10-15 16:42:51,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:51,274 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-10-15 16:42:51,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:42:51,275 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 16:42:51,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:51,276 INFO L225 Difference]: With dead ends: 78 [2020-10-15 16:42:51,276 INFO L226 Difference]: Without dead ends: 72 [2020-10-15 16:42:51,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:42:51,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-15 16:42:51,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-10-15 16:42:51,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 16:42:51,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-10-15 16:42:51,278 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-10-15 16:42:51,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:51,279 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-10-15 16:42:51,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:42:51,279 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-10-15 16:42:51,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:42:51,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:51,280 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:51,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:51,480 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:51,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:51,481 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-10-15 16:42:51,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:51,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772633999] [2020-10-15 16:42:51,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:51,625 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:51,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772633999] [2020-10-15 16:42:51,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453513100] [2020-10-15 16:42:51,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:51,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:42:51,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:51,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:42:51,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:51,686 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:51,698 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:51,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:51,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 16:42:51,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264821187] [2020-10-15 16:42:51,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:42:51,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:51,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:42:51,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:42:51,700 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-10-15 16:42:51,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:51,964 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-10-15 16:42:51,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:42:51,965 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 16:42:51,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:51,966 INFO L225 Difference]: With dead ends: 90 [2020-10-15 16:42:51,966 INFO L226 Difference]: Without dead ends: 84 [2020-10-15 16:42:51,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:42:51,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-15 16:42:51,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-10-15 16:42:51,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 16:42:51,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-10-15 16:42:51,969 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-10-15 16:42:51,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:51,970 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-10-15 16:42:51,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:42:51,970 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-10-15 16:42:51,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:42:51,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:51,970 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:52,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:52,178 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:52,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:52,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-10-15 16:42:52,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:52,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163478876] [2020-10-15 16:42:52,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:52,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:52,308 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:52,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163478876] [2020-10-15 16:42:52,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790199423] [2020-10-15 16:42:52,309 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:52,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-15 16:42:52,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:52,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:42:52,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:52,362 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:52,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:52,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 16:42:52,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818780318] [2020-10-15 16:42:52,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:42:52,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:52,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:42:52,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:42:52,364 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-10-15 16:42:52,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:52,663 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-10-15 16:42:52,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:42:52,664 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 16:42:52,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:52,665 INFO L225 Difference]: With dead ends: 91 [2020-10-15 16:42:52,665 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 16:42:52,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:42:52,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 16:42:52,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-10-15 16:42:52,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-15 16:42:52,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-10-15 16:42:52,667 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-10-15 16:42:52,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:52,668 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-10-15 16:42:52,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:42:52,668 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-10-15 16:42:52,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:42:52,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:52,668 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:52,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:52,869 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:52,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:52,870 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-10-15 16:42:52,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:52,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767529632] [2020-10-15 16:42:52,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:52,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:52,999 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:53,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767529632] [2020-10-15 16:42:53,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797592147] [2020-10-15 16:42:53,000 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:53,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-15 16:42:53,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:53,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:42:53,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:53,071 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:53,081 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:53,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:53,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 16:42:53,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657314537] [2020-10-15 16:42:53,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:42:53,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:53,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:42:53,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:42:53,082 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-10-15 16:42:53,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:53,410 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-10-15 16:42:53,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:42:53,411 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 16:42:53,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:53,412 INFO L225 Difference]: With dead ends: 99 [2020-10-15 16:42:53,412 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 16:42:53,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:42:53,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 16:42:53,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-10-15 16:42:53,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 16:42:53,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-10-15 16:42:53,414 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-10-15 16:42:53,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:53,415 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-10-15 16:42:53,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:42:53,415 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-10-15 16:42:53,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:42:53,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:53,415 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:53,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:53,616 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:53,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:53,617 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-10-15 16:42:53,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:53,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333891442] [2020-10-15 16:42:53,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:53,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:53,742 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:53,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333891442] [2020-10-15 16:42:53,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170035911] [2020-10-15 16:42:53,743 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:53,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:53,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:42:53,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:53,802 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:53,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:53,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 16:42:53,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312063981] [2020-10-15 16:42:53,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:42:53,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:53,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:42:53,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:42:53,808 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-10-15 16:42:54,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:54,140 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-15 16:42:54,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:42:54,140 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 16:42:54,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:54,141 INFO L225 Difference]: With dead ends: 99 [2020-10-15 16:42:54,141 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 16:42:54,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:42:54,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 16:42:54,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-10-15 16:42:54,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-15 16:42:54,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-10-15 16:42:54,144 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-10-15 16:42:54,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:54,144 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-10-15 16:42:54,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:42:54,144 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-10-15 16:42:54,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:42:54,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:54,145 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:54,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-10-15 16:42:54,346 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:54,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:54,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-10-15 16:42:54,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:54,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144408097] [2020-10-15 16:42:54,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:54,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:54,465 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:54,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144408097] [2020-10-15 16:42:54,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752601313] [2020-10-15 16:42:54,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:54,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:54,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:54,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:42:54,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:54,522 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:54,531 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:54,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:54,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 16:42:54,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938106820] [2020-10-15 16:42:54,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:42:54,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:54,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:42:54,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:42:54,533 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-10-15 16:42:54,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:54,931 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-10-15 16:42:54,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:42:54,932 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 16:42:54,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:54,933 INFO L225 Difference]: With dead ends: 96 [2020-10-15 16:42:54,933 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 16:42:54,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:42:54,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 16:42:54,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-10-15 16:42:54,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-15 16:42:54,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-10-15 16:42:54,935 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-10-15 16:42:54,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:54,936 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-10-15 16:42:54,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:42:54,936 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-10-15 16:42:54,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:42:54,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:54,936 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:55,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:55,140 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:55,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:55,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-10-15 16:42:55,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:55,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106429816] [2020-10-15 16:42:55,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:55,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:55,252 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:55,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106429816] [2020-10-15 16:42:55,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124883706] [2020-10-15 16:42:55,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:55,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 16:42:55,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:55,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:42:55,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:55,311 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:55,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:55,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 16:42:55,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622657013] [2020-10-15 16:42:55,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:42:55,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:55,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:42:55,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:42:55,312 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-10-15 16:42:55,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:55,681 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-10-15 16:42:55,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:42:55,682 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 16:42:55,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:55,683 INFO L225 Difference]: With dead ends: 97 [2020-10-15 16:42:55,683 INFO L226 Difference]: Without dead ends: 91 [2020-10-15 16:42:55,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:42:55,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-15 16:42:55,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-10-15 16:42:55,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 16:42:55,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 16:42:55,686 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-10-15 16:42:55,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:55,686 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 16:42:55,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:42:55,686 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 16:42:55,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:42:55,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:55,687 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:55,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-10-15 16:42:55,897 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:55,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:55,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-10-15 16:42:55,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:55,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467501267] [2020-10-15 16:42:55,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:55,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:56,004 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:56,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467501267] [2020-10-15 16:42:56,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461987747] [2020-10-15 16:42:56,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:56,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:42:56,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:56,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:42:56,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:56,097 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:56,111 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:56,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:56,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 16:42:56,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25961509] [2020-10-15 16:42:56,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:42:56,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:56,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:42:56,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:42:56,114 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-10-15 16:42:56,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:56,757 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-15 16:42:56,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:42:56,758 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 16:42:56,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:56,759 INFO L225 Difference]: With dead ends: 94 [2020-10-15 16:42:56,759 INFO L226 Difference]: Without dead ends: 88 [2020-10-15 16:42:56,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 16:42:56,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-15 16:42:56,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-10-15 16:42:56,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 16:42:56,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 16:42:56,763 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-10-15 16:42:56,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:56,764 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 16:42:56,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:42:56,764 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 16:42:56,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:42:56,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:56,765 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:56,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:56,974 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:56,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:56,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-10-15 16:42:56,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:56,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624041489] [2020-10-15 16:42:56,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:56,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:57,088 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:57,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624041489] [2020-10-15 16:42:57,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634461371] [2020-10-15 16:42:57,088 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:57,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-15 16:42:57,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:57,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:42:57,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:57,148 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:57,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:57,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 16:42:57,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051222110] [2020-10-15 16:42:57,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:42:57,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:57,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:42:57,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:42:57,150 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-10-15 16:42:57,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:57,590 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-10-15 16:42:57,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:42:57,590 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 16:42:57,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:57,591 INFO L225 Difference]: With dead ends: 95 [2020-10-15 16:42:57,592 INFO L226 Difference]: Without dead ends: 89 [2020-10-15 16:42:57,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:42:57,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-15 16:42:57,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-10-15 16:42:57,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-15 16:42:57,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-10-15 16:42:57,595 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-10-15 16:42:57,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:57,595 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-10-15 16:42:57,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:42:57,595 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-10-15 16:42:57,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:42:57,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:57,596 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:57,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-15 16:42:57,796 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:57,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:57,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-10-15 16:42:57,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:57,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494177069] [2020-10-15 16:42:57,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:57,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:57,906 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:57,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494177069] [2020-10-15 16:42:57,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178121510] [2020-10-15 16:42:57,907 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:57,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-15 16:42:57,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:57,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:42:57,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:57,975 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:57,993 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:57,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:57,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 16:42:57,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409968915] [2020-10-15 16:42:57,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:42:57,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:57,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:42:57,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:42:57,995 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-10-15 16:42:58,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:58,518 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-15 16:42:58,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:42:58,519 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 16:42:58,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:58,520 INFO L225 Difference]: With dead ends: 92 [2020-10-15 16:42:58,520 INFO L226 Difference]: Without dead ends: 86 [2020-10-15 16:42:58,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:42:58,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-15 16:42:58,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-10-15 16:42:58,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 16:42:58,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-15 16:42:58,523 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-10-15 16:42:58,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:58,523 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-15 16:42:58,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:42:58,523 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-15 16:42:58,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:42:58,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:58,524 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:58,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:58,733 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:58,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:58,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-10-15 16:42:58,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:58,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202096109] [2020-10-15 16:42:58,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:58,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:58,835 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:58,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202096109] [2020-10-15 16:42:58,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724050990] [2020-10-15 16:42:58,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:58,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:58,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:42:58,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:58,892 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:58,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:58,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 16:42:58,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405119582] [2020-10-15 16:42:58,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:42:58,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:58,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:42:58,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:42:58,894 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-10-15 16:42:59,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:59,352 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-10-15 16:42:59,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:42:59,353 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 16:42:59,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:59,354 INFO L225 Difference]: With dead ends: 112 [2020-10-15 16:42:59,354 INFO L226 Difference]: Without dead ends: 106 [2020-10-15 16:42:59,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:42:59,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-15 16:42:59,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-10-15 16:42:59,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 16:42:59,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-10-15 16:42:59,357 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-10-15 16:42:59,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:59,358 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-10-15 16:42:59,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:42:59,358 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-10-15 16:42:59,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:42:59,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:59,359 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:59,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:59,564 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:59,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:59,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-10-15 16:42:59,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:59,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055892391] [2020-10-15 16:42:59,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:59,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:59,661 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:59,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055892391] [2020-10-15 16:42:59,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865097639] [2020-10-15 16:42:59,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:59,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:59,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:59,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:42:59,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:59,759 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:59,774 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:59,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:59,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 16:42:59,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057768634] [2020-10-15 16:42:59,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:42:59,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:59,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:42:59,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:42:59,775 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-10-15 16:43:00,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:00,355 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-10-15 16:43:00,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:43:00,356 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 16:43:00,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:00,357 INFO L225 Difference]: With dead ends: 93 [2020-10-15 16:43:00,357 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 16:43:00,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=469, Invalid=1013, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 16:43:00,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 16:43:00,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-10-15 16:43:00,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-15 16:43:00,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-10-15 16:43:00,360 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-10-15 16:43:00,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:00,360 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-10-15 16:43:00,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:00,360 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-10-15 16:43:00,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:00,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:00,361 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:00,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:00,561 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:00,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:00,562 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-10-15 16:43:00,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:00,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081458516] [2020-10-15 16:43:00,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:00,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:00,727 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:00,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081458516] [2020-10-15 16:43:00,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105466721] [2020-10-15 16:43:00,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:00,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 16:43:00,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:00,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:00,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:00,783 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:00,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:00,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 16:43:00,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608577689] [2020-10-15 16:43:00,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:00,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:00,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:00,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:00,785 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-10-15 16:43:01,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:01,064 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-10-15 16:43:01,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:43:01,065 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 16:43:01,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:01,066 INFO L225 Difference]: With dead ends: 104 [2020-10-15 16:43:01,066 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 16:43:01,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:43:01,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 16:43:01,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-10-15 16:43:01,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 16:43:01,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 16:43:01,069 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 16:43:01,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:01,069 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 16:43:01,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:01,070 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 16:43:01,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:01,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:01,070 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:01,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:01,279 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:01,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:01,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-10-15 16:43:01,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:01,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503082222] [2020-10-15 16:43:01,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:01,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:01,428 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:01,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503082222] [2020-10-15 16:43:01,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058974079] [2020-10-15 16:43:01,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:01,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:01,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:01,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:01,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:01,493 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:01,509 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:01,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:01,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 16:43:01,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168135326] [2020-10-15 16:43:01,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:01,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:01,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:01,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:01,511 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 16:43:01,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:01,858 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-10-15 16:43:01,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:43:01,859 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 16:43:01,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:01,860 INFO L225 Difference]: With dead ends: 101 [2020-10-15 16:43:01,860 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 16:43:01,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:43:01,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 16:43:01,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-10-15 16:43:01,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 16:43:01,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 16:43:01,863 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 16:43:01,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:01,863 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 16:43:01,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:01,863 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 16:43:01,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:01,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:01,864 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:02,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:02,065 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:02,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:02,066 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-10-15 16:43:02,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:02,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704379165] [2020-10-15 16:43:02,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:02,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:02,204 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:02,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704379165] [2020-10-15 16:43:02,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584990427] [2020-10-15 16:43:02,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:02,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-15 16:43:02,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:02,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:02,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:02,259 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:02,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:02,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 16:43:02,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065061288] [2020-10-15 16:43:02,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:02,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:02,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:02,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:02,260 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 16:43:02,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:02,580 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-10-15 16:43:02,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:43:02,581 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 16:43:02,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:02,582 INFO L225 Difference]: With dead ends: 98 [2020-10-15 16:43:02,582 INFO L226 Difference]: Without dead ends: 92 [2020-10-15 16:43:02,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:43:02,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-15 16:43:02,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-10-15 16:43:02,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 16:43:02,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 16:43:02,584 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 16:43:02,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:02,585 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 16:43:02,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:02,585 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 16:43:02,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:02,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:02,585 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:02,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:02,793 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:02,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:02,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-10-15 16:43:02,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:02,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550716027] [2020-10-15 16:43:02,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:02,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:02,935 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:02,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550716027] [2020-10-15 16:43:02,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128707008] [2020-10-15 16:43:02,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:02,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-15 16:43:02,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:02,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:02,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:03,005 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:03,017 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:03,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:03,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 16:43:03,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129447747] [2020-10-15 16:43:03,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:03,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:03,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:03,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:03,020 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 16:43:03,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:03,444 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-10-15 16:43:03,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:43:03,445 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 16:43:03,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:03,445 INFO L225 Difference]: With dead ends: 97 [2020-10-15 16:43:03,446 INFO L226 Difference]: Without dead ends: 91 [2020-10-15 16:43:03,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:43:03,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-15 16:43:03,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-10-15 16:43:03,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 16:43:03,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 16:43:03,449 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 16:43:03,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:03,450 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 16:43:03,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:03,450 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 16:43:03,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:03,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:03,450 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:03,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:03,654 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:03,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:03,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-10-15 16:43:03,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:03,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371472349] [2020-10-15 16:43:03,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:03,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:03,786 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:03,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371472349] [2020-10-15 16:43:03,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134252068] [2020-10-15 16:43:03,787 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:03,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:03,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:03,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:03,841 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:03,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:03,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 16:43:03,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848310102] [2020-10-15 16:43:03,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:03,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:03,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:03,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:03,842 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 16:43:04,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:04,210 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-10-15 16:43:04,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:43:04,210 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 16:43:04,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:04,211 INFO L225 Difference]: With dead ends: 94 [2020-10-15 16:43:04,212 INFO L226 Difference]: Without dead ends: 88 [2020-10-15 16:43:04,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:43:04,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-15 16:43:04,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-10-15 16:43:04,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 16:43:04,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 16:43:04,214 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 16:43:04,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:04,214 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 16:43:04,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:04,214 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 16:43:04,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:04,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:04,215 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:04,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-10-15 16:43:04,417 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:04,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:04,417 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-10-15 16:43:04,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:04,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020658944] [2020-10-15 16:43:04,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:04,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:04,549 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:04,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020658944] [2020-10-15 16:43:04,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010982425] [2020-10-15 16:43:04,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:04,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:04,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:04,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:04,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:04,612 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:04,623 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:04,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:04,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 16:43:04,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144352900] [2020-10-15 16:43:04,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:04,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:04,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:04,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:04,625 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 16:43:05,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:05,108 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-10-15 16:43:05,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:43:05,109 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 16:43:05,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:05,110 INFO L225 Difference]: With dead ends: 93 [2020-10-15 16:43:05,110 INFO L226 Difference]: Without dead ends: 87 [2020-10-15 16:43:05,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:43:05,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-15 16:43:05,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-10-15 16:43:05,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 16:43:05,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 16:43:05,112 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 16:43:05,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:05,113 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 16:43:05,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:05,113 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 16:43:05,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:05,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:05,113 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:05,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:05,318 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:05,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:05,318 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-10-15 16:43:05,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:05,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714332532] [2020-10-15 16:43:05,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:05,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:05,429 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:05,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714332532] [2020-10-15 16:43:05,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010343499] [2020-10-15 16:43:05,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:05,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 16:43:05,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:05,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:05,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:05,490 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:05,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:05,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 16:43:05,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904431671] [2020-10-15 16:43:05,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:05,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:05,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:05,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:05,492 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 16:43:05,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:05,904 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-10-15 16:43:05,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:43:05,905 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 16:43:05,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:05,906 INFO L225 Difference]: With dead ends: 90 [2020-10-15 16:43:05,906 INFO L226 Difference]: Without dead ends: 84 [2020-10-15 16:43:05,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 16:43:05,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-15 16:43:05,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-10-15 16:43:05,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 16:43:05,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 16:43:05,909 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 16:43:05,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:05,909 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 16:43:05,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:05,909 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 16:43:05,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:05,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:05,910 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:06,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-10-15 16:43:06,111 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:06,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:06,111 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-10-15 16:43:06,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:06,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816276784] [2020-10-15 16:43:06,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:06,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:06,235 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:06,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816276784] [2020-10-15 16:43:06,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750808253] [2020-10-15 16:43:06,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:06,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:06,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:06,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:06,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:06,299 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:06,316 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:06,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:06,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 16:43:06,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433837068] [2020-10-15 16:43:06,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:06,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:06,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:06,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:06,317 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 16:43:06,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:06,868 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-15 16:43:06,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:43:06,868 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 16:43:06,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:06,869 INFO L225 Difference]: With dead ends: 89 [2020-10-15 16:43:06,869 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 16:43:06,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:43:06,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 16:43:06,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-10-15 16:43:06,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 16:43:06,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 16:43:06,872 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 16:43:06,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:06,873 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 16:43:06,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:06,873 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 16:43:06,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:06,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:06,873 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:07,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:07,074 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:07,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:07,075 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-10-15 16:43:07,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:07,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996529622] [2020-10-15 16:43:07,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:07,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:07,192 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:07,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996529622] [2020-10-15 16:43:07,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482483819] [2020-10-15 16:43:07,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:07,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-15 16:43:07,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:07,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:07,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:07,272 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:07,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:07,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 16:43:07,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66504602] [2020-10-15 16:43:07,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:07,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:07,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:07,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:07,274 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 16:43:07,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:07,730 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-10-15 16:43:07,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:43:07,731 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 16:43:07,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:07,731 INFO L225 Difference]: With dead ends: 86 [2020-10-15 16:43:07,732 INFO L226 Difference]: Without dead ends: 80 [2020-10-15 16:43:07,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:43:07,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-15 16:43:07,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-10-15 16:43:07,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 16:43:07,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 16:43:07,735 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 16:43:07,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:07,735 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 16:43:07,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:07,735 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 16:43:07,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:07,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:07,736 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:07,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:07,939 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:07,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:07,939 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-10-15 16:43:07,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:07,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719891430] [2020-10-15 16:43:07,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:07,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:08,059 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:08,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719891430] [2020-10-15 16:43:08,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915480887] [2020-10-15 16:43:08,060 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:08,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-15 16:43:08,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:08,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:08,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:08,123 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:08,134 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:08,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:08,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 16:43:08,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713964740] [2020-10-15 16:43:08,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:08,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:08,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:08,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:08,136 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 16:43:08,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:08,761 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-10-15 16:43:08,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:43:08,762 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 16:43:08,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:08,763 INFO L225 Difference]: With dead ends: 85 [2020-10-15 16:43:08,763 INFO L226 Difference]: Without dead ends: 79 [2020-10-15 16:43:08,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:43:08,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-15 16:43:08,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-10-15 16:43:08,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 16:43:08,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 16:43:08,765 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 16:43:08,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:08,766 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 16:43:08,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:08,766 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 16:43:08,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:08,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:08,767 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:08,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:08,974 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:08,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:08,975 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-10-15 16:43:08,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:08,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410154231] [2020-10-15 16:43:08,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:08,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:09,090 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:09,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410154231] [2020-10-15 16:43:09,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870383743] [2020-10-15 16:43:09,091 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:09,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:09,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:09,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:09,158 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:09,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:09,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 16:43:09,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499356005] [2020-10-15 16:43:09,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:09,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:09,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:09,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:09,159 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 16:43:09,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:09,663 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-15 16:43:09,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:43:09,664 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 16:43:09,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:09,665 INFO L225 Difference]: With dead ends: 101 [2020-10-15 16:43:09,665 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 16:43:09,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 16:43:09,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 16:43:09,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-10-15 16:43:09,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-15 16:43:09,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-10-15 16:43:09,668 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-10-15 16:43:09,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:09,669 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-10-15 16:43:09,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:09,669 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-10-15 16:43:09,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:09,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:09,669 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:09,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:09,878 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:09,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:09,879 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-10-15 16:43:09,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:09,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014056414] [2020-10-15 16:43:09,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:09,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:09,993 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:09,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014056414] [2020-10-15 16:43:09,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327954366] [2020-10-15 16:43:09,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:10,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:10,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:10,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:10,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:10,060 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:10,077 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:10,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:10,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 16:43:10,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775401991] [2020-10-15 16:43:10,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:10,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:10,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:10,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:10,079 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-10-15 16:43:10,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:10,736 INFO L93 Difference]: Finished difference Result 82 states and 201 transitions. [2020-10-15 16:43:10,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:43:10,736 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 16:43:10,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:10,737 INFO L225 Difference]: With dead ends: 82 [2020-10-15 16:43:10,737 INFO L226 Difference]: Without dead ends: 74 [2020-10-15 16:43:10,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 16:43:10,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-15 16:43:10,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2020-10-15 16:43:10,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-15 16:43:10,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-10-15 16:43:10,740 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-10-15 16:43:10,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:10,740 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-10-15 16:43:10,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:10,740 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-10-15 16:43:10,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:10,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:10,741 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:10,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:10,942 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:10,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:10,942 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-10-15 16:43:10,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:10,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896571202] [2020-10-15 16:43:10,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:10,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:11,057 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:11,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896571202] [2020-10-15 16:43:11,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036464112] [2020-10-15 16:43:11,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:11,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 16:43:11,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:11,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:11,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:11,121 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:43:11,135 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:11,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:11,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 16:43:11,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14398679] [2020-10-15 16:43:11,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:11,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:11,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:11,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:11,136 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-10-15 16:43:11,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:11,743 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-15 16:43:11,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:43:11,744 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 16:43:11,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:11,745 INFO L225 Difference]: With dead ends: 92 [2020-10-15 16:43:11,745 INFO L226 Difference]: Without dead ends: 87 [2020-10-15 16:43:11,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 16:43:11,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-15 16:43:11,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-10-15 16:43:11,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 16:43:11,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-15 16:43:11,747 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-10-15 16:43:11,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:11,748 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-15 16:43:11,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:11,748 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-15 16:43:11,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:11,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:11,748 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:11,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:11,952 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:11,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:11,952 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-10-15 16:43:11,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:11,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064311081] [2020-10-15 16:43:11,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:11,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:12,078 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:12,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064311081] [2020-10-15 16:43:12,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508032772] [2020-10-15 16:43:12,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:12,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:12,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:12,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:12,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:12,145 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:43:12,158 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:12,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:12,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 16:43:12,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225940939] [2020-10-15 16:43:12,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:12,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:12,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:12,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:12,160 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-10-15 16:43:12,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:12,820 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-10-15 16:43:12,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:43:12,821 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 16:43:12,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:12,822 INFO L225 Difference]: With dead ends: 78 [2020-10-15 16:43:12,822 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 16:43:12,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 16:43:12,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 16:43:12,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-10-15 16:43:12,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 16:43:12,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-10-15 16:43:12,825 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-10-15 16:43:12,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:12,825 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-10-15 16:43:12,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:12,825 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-10-15 16:43:12,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:12,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:12,826 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:13,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-10-15 16:43:13,028 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:13,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:13,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-10-15 16:43:13,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:13,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514903767] [2020-10-15 16:43:13,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:13,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:13,204 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:13,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514903767] [2020-10-15 16:43:13,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44355962] [2020-10-15 16:43:13,205 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:13,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 16:43:13,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:13,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:13,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:13,260 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:13,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:13,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 16:43:13,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316138253] [2020-10-15 16:43:13,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:13,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:13,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:13,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:13,262 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-10-15 16:43:13,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:13,557 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-15 16:43:13,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:43:13,557 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 16:43:13,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:13,558 INFO L225 Difference]: With dead ends: 84 [2020-10-15 16:43:13,558 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 16:43:13,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:43:13,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 16:43:13,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-10-15 16:43:13,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 16:43:13,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-10-15 16:43:13,561 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-10-15 16:43:13,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:13,561 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-10-15 16:43:13,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:13,561 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-10-15 16:43:13,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:13,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:13,562 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:13,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:13,763 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:13,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:13,763 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-10-15 16:43:13,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:13,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710734911] [2020-10-15 16:43:13,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:13,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:13,940 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:13,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710734911] [2020-10-15 16:43:13,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434980319] [2020-10-15 16:43:13,941 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:13,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 16:43:13,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:13,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:13,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:14,013 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:14,023 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:14,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:14,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 16:43:14,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450488822] [2020-10-15 16:43:14,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:14,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:14,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:14,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:14,024 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-10-15 16:43:14,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:14,316 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-10-15 16:43:14,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:43:14,317 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 16:43:14,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:14,318 INFO L225 Difference]: With dead ends: 98 [2020-10-15 16:43:14,318 INFO L226 Difference]: Without dead ends: 92 [2020-10-15 16:43:14,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:43:14,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-15 16:43:14,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-10-15 16:43:14,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-15 16:43:14,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-10-15 16:43:14,320 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-10-15 16:43:14,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:14,320 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-10-15 16:43:14,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:14,320 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-10-15 16:43:14,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:14,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:14,321 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:14,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-10-15 16:43:14,522 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:14,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:14,522 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-10-15 16:43:14,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:14,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230848721] [2020-10-15 16:43:14,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:14,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:14,690 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:14,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230848721] [2020-10-15 16:43:14,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485042774] [2020-10-15 16:43:14,690 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:14,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:14,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:14,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:14,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 16:43:14,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267485424] [2020-10-15 16:43:14,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:14,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:14,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:14,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:14,748 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-10-15 16:43:15,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:15,163 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-15 16:43:15,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:43:15,164 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 16:43:15,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:15,165 INFO L225 Difference]: With dead ends: 99 [2020-10-15 16:43:15,165 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 16:43:15,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:43:15,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 16:43:15,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-10-15 16:43:15,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 16:43:15,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-10-15 16:43:15,168 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-10-15 16:43:15,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:15,168 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-10-15 16:43:15,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:15,169 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-10-15 16:43:15,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:15,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:15,169 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:15,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:15,370 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:15,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:15,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-10-15 16:43:15,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:15,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498984311] [2020-10-15 16:43:15,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:15,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:15,610 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:15,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498984311] [2020-10-15 16:43:15,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439515721] [2020-10-15 16:43:15,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:15,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:15,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:15,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:15,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:15,694 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:15,705 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:15,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:15,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 16:43:15,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218508201] [2020-10-15 16:43:15,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:15,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:15,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:15,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:15,707 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-10-15 16:43:16,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:16,094 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-10-15 16:43:16,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:43:16,095 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 16:43:16,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:16,096 INFO L225 Difference]: With dead ends: 109 [2020-10-15 16:43:16,096 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 16:43:16,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 16:43:16,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 16:43:16,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-10-15 16:43:16,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 16:43:16,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-10-15 16:43:16,099 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-10-15 16:43:16,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:16,099 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-10-15 16:43:16,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:16,099 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-10-15 16:43:16,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:16,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:16,100 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:16,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:16,307 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:16,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:16,308 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-10-15 16:43:16,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:16,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926468484] [2020-10-15 16:43:16,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:16,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:16,462 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:16,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926468484] [2020-10-15 16:43:16,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331493458] [2020-10-15 16:43:16,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:16,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 16:43:16,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:16,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:16,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:16,524 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:16,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:16,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 16:43:16,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502978092] [2020-10-15 16:43:16,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:16,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:16,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:16,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:16,525 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-10-15 16:43:16,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:16,926 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-10-15 16:43:16,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:43:16,927 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 16:43:16,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:16,928 INFO L225 Difference]: With dead ends: 109 [2020-10-15 16:43:16,928 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 16:43:16,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:43:16,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 16:43:16,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-10-15 16:43:16,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-15 16:43:16,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-10-15 16:43:16,931 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-10-15 16:43:16,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:16,931 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-10-15 16:43:16,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:16,932 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-10-15 16:43:16,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:16,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:16,932 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:17,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-15 16:43:17,136 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:17,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:17,136 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-10-15 16:43:17,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:17,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740854071] [2020-10-15 16:43:17,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:17,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:17,298 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:17,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740854071] [2020-10-15 16:43:17,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210149415] [2020-10-15 16:43:17,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:17,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:17,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:17,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:17,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:17,363 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:17,374 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:17,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:17,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 16:43:17,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463837419] [2020-10-15 16:43:17,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:17,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:17,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:17,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:17,376 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-10-15 16:43:17,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:17,864 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-10-15 16:43:17,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:43:17,865 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 16:43:17,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:17,866 INFO L225 Difference]: With dead ends: 106 [2020-10-15 16:43:17,866 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 16:43:17,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:43:17,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 16:43:17,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-15 16:43:17,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 16:43:17,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-10-15 16:43:17,869 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-10-15 16:43:17,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:17,869 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-10-15 16:43:17,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:17,869 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-10-15 16:43:17,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:17,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:17,870 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:18,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-15 16:43:18,078 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:18,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:18,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-10-15 16:43:18,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:18,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433206981] [2020-10-15 16:43:18,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:18,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:18,207 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:18,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433206981] [2020-10-15 16:43:18,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723952022] [2020-10-15 16:43:18,207 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:18,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 16:43:18,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:18,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:18,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:18,264 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:18,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:18,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 16:43:18,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351846772] [2020-10-15 16:43:18,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:18,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:18,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:18,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:18,265 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-10-15 16:43:18,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:18,710 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-10-15 16:43:18,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:43:18,711 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 16:43:18,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:18,712 INFO L225 Difference]: With dead ends: 107 [2020-10-15 16:43:18,712 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 16:43:18,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:43:18,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 16:43:18,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-15 16:43:18,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-15 16:43:18,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-10-15 16:43:18,714 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-10-15 16:43:18,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:18,715 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-10-15 16:43:18,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:18,715 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-10-15 16:43:18,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:18,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:18,717 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:18,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:18,925 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:18,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:18,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-10-15 16:43:18,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:18,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010147497] [2020-10-15 16:43:18,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:18,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:19,075 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:19,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010147497] [2020-10-15 16:43:19,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463190712] [2020-10-15 16:43:19,076 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:19,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 16:43:19,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:19,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:19,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:19,142 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:19,152 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:19,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:19,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 16:43:19,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566452625] [2020-10-15 16:43:19,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:19,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:19,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:19,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:19,154 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-10-15 16:43:19,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:19,693 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-10-15 16:43:19,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:43:19,693 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 16:43:19,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:19,694 INFO L225 Difference]: With dead ends: 104 [2020-10-15 16:43:19,694 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 16:43:19,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 16:43:19,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 16:43:19,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-10-15 16:43:19,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 16:43:19,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-10-15 16:43:19,697 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-10-15 16:43:19,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:19,697 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-10-15 16:43:19,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:19,698 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-10-15 16:43:19,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:19,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:19,701 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:19,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-15 16:43:19,903 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:19,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:19,903 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-10-15 16:43:19,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:19,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310245941] [2020-10-15 16:43:19,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:19,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:20,045 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:20,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310245941] [2020-10-15 16:43:20,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348165481] [2020-10-15 16:43:20,046 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:20,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:20,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:20,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:20,104 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:20,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:20,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 16:43:20,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883885696] [2020-10-15 16:43:20,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:20,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:20,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:20,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:20,106 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-10-15 16:43:20,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:20,601 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-10-15 16:43:20,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:43:20,602 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 16:43:20,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:20,603 INFO L225 Difference]: With dead ends: 105 [2020-10-15 16:43:20,603 INFO L226 Difference]: Without dead ends: 99 [2020-10-15 16:43:20,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:43:20,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-15 16:43:20,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-10-15 16:43:20,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 16:43:20,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 16:43:20,606 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-10-15 16:43:20,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:20,606 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 16:43:20,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:20,606 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 16:43:20,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:20,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:20,607 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:20,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:20,814 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:20,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:20,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-10-15 16:43:20,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:20,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342717868] [2020-10-15 16:43:20,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:20,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:20,951 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:20,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342717868] [2020-10-15 16:43:20,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933719417] [2020-10-15 16:43:20,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:20,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:20,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:20,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:20,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:21,016 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:21,034 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:21,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:21,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 16:43:21,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998083978] [2020-10-15 16:43:21,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:21,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:21,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:21,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:21,035 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-10-15 16:43:21,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:21,653 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-10-15 16:43:21,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:43:21,654 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 16:43:21,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:21,655 INFO L225 Difference]: With dead ends: 102 [2020-10-15 16:43:21,655 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 16:43:21,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:43:21,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 16:43:21,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-10-15 16:43:21,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 16:43:21,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 16:43:21,657 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-10-15 16:43:21,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:21,658 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 16:43:21,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:21,658 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 16:43:21,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:21,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:21,659 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:21,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-10-15 16:43:21,868 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:21,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:21,868 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-10-15 16:43:21,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:21,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176713375] [2020-10-15 16:43:21,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:21,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:21,995 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:21,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176713375] [2020-10-15 16:43:21,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451495816] [2020-10-15 16:43:21,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:22,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 16:43:22,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:22,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:22,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:22,058 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:22,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:22,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 16:43:22,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652686167] [2020-10-15 16:43:22,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:22,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:22,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:22,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:22,059 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-10-15 16:43:22,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:22,603 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-10-15 16:43:22,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:43:22,604 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 16:43:22,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:22,605 INFO L225 Difference]: With dead ends: 103 [2020-10-15 16:43:22,605 INFO L226 Difference]: Without dead ends: 97 [2020-10-15 16:43:22,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 16:43:22,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-15 16:43:22,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-10-15 16:43:22,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 16:43:22,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-10-15 16:43:22,608 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-10-15 16:43:22,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:22,608 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-10-15 16:43:22,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:22,608 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-10-15 16:43:22,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:22,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:22,609 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:22,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:22,812 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:22,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:22,812 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-10-15 16:43:22,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:22,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749019050] [2020-10-15 16:43:22,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:22,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:22,946 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:22,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749019050] [2020-10-15 16:43:22,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909536075] [2020-10-15 16:43:22,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:22,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:22,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:22,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:22,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:23,010 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:23,022 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:23,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:23,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 16:43:23,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637166670] [2020-10-15 16:43:23,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:23,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:23,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:23,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:23,023 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-10-15 16:43:23,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:23,705 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-10-15 16:43:23,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:43:23,705 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 16:43:23,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:23,706 INFO L225 Difference]: With dead ends: 100 [2020-10-15 16:43:23,706 INFO L226 Difference]: Without dead ends: 94 [2020-10-15 16:43:23,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 16:43:23,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-15 16:43:23,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-10-15 16:43:23,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 16:43:23,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-15 16:43:23,709 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-10-15 16:43:23,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:23,710 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-15 16:43:23,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:23,710 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-15 16:43:23,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:23,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:23,710 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:23,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-15 16:43:23,918 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:23,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:23,918 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-10-15 16:43:23,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:23,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062413173] [2020-10-15 16:43:23,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:23,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:24,057 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:24,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062413173] [2020-10-15 16:43:24,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345718966] [2020-10-15 16:43:24,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:24,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 16:43:24,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:24,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:24,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:24,157 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:24,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:24,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 16:43:24,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060503454] [2020-10-15 16:43:24,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:24,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:24,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:24,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:24,160 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-10-15 16:43:24,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:24,843 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-15 16:43:24,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:43:24,843 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 16:43:24,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:24,844 INFO L225 Difference]: With dead ends: 120 [2020-10-15 16:43:24,844 INFO L226 Difference]: Without dead ends: 114 [2020-10-15 16:43:24,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:43:24,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-15 16:43:24,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-10-15 16:43:24,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 16:43:24,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-10-15 16:43:24,847 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-10-15 16:43:24,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:24,847 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-10-15 16:43:24,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:24,847 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-10-15 16:43:24,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:24,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:24,848 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:25,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-15 16:43:25,048 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:25,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:25,049 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-10-15 16:43:25,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:25,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038239850] [2020-10-15 16:43:25,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:25,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:25,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038239850] [2020-10-15 16:43:25,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337322437] [2020-10-15 16:43:25,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:25,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 16:43:25,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:25,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:25,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:25,299 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:25,311 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:25,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:25,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 16:43:25,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214516291] [2020-10-15 16:43:25,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:25,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:25,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:25,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:25,313 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-10-15 16:43:25,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:25,985 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-10-15 16:43:25,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:43:25,985 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 16:43:25,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:25,986 INFO L225 Difference]: With dead ends: 101 [2020-10-15 16:43:25,986 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 16:43:25,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:43:25,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 16:43:25,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-10-15 16:43:25,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-15 16:43:25,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-10-15 16:43:25,990 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-10-15 16:43:25,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:25,991 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-10-15 16:43:25,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:25,991 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-10-15 16:43:25,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:43:25,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:25,991 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:26,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:26,195 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:26,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:26,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-10-15 16:43:26,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:26,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192414306] [2020-10-15 16:43:26,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:26,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:26,388 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:26,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192414306] [2020-10-15 16:43:26,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055184355] [2020-10-15 16:43:26,389 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:26,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:26,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:43:26,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:26,448 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:26,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:26,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 16:43:26,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003574507] [2020-10-15 16:43:26,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:26,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:26,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:26,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:26,449 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-10-15 16:43:26,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:26,765 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-10-15 16:43:26,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:43:26,765 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 16:43:26,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:26,766 INFO L225 Difference]: With dead ends: 114 [2020-10-15 16:43:26,766 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 16:43:26,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:43:26,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 16:43:26,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-10-15 16:43:26,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 16:43:26,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 16:43:26,769 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 16:43:26,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:26,769 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 16:43:26,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:26,769 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 16:43:26,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:43:26,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:26,770 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:26,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:26,970 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:26,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:26,971 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-10-15 16:43:26,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:26,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749133894] [2020-10-15 16:43:26,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:27,167 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:27,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749133894] [2020-10-15 16:43:27,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169713968] [2020-10-15 16:43:27,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:27,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:27,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:27,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:43:27,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:27,228 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:27,238 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:27,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:27,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 16:43:27,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623058002] [2020-10-15 16:43:27,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:43:27,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:27,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:43:27,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:43:27,239 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 16:43:27,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:27,661 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-10-15 16:43:27,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:43:27,661 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 16:43:27,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:27,662 INFO L225 Difference]: With dead ends: 111 [2020-10-15 16:43:27,662 INFO L226 Difference]: Without dead ends: 105 [2020-10-15 16:43:27,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:43:27,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-15 16:43:27,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-10-15 16:43:27,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:43:27,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 16:43:27,665 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 16:43:27,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:27,665 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 16:43:27,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:43:27,665 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 16:43:27,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:43:27,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:27,666 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:27,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-15 16:43:27,867 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:27,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:27,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-10-15 16:43:27,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:27,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265949743] [2020-10-15 16:43:27,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:27,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:28,047 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:28,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265949743] [2020-10-15 16:43:28,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425493549] [2020-10-15 16:43:28,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:28,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 16:43:28,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:28,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:43:28,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:28,106 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:28,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:28,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 16:43:28,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629083715] [2020-10-15 16:43:28,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:28,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:28,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:28,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:28,107 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 16:43:28,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:28,501 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-15 16:43:28,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:43:28,501 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 16:43:28,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:28,502 INFO L225 Difference]: With dead ends: 108 [2020-10-15 16:43:28,502 INFO L226 Difference]: Without dead ends: 102 [2020-10-15 16:43:28,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 16:43:28,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-15 16:43:28,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-10-15 16:43:28,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 16:43:28,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 16:43:28,504 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 16:43:28,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:28,505 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 16:43:28,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:28,505 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 16:43:28,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:43:28,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:28,505 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:28,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:28,713 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:28,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:28,714 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-10-15 16:43:28,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:28,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482445537] [2020-10-15 16:43:28,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:28,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:28,898 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:28,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482445537] [2020-10-15 16:43:28,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537142197] [2020-10-15 16:43:28,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:28,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:28,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:28,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:43:28,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:28,960 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:28,970 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:28,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:28,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 16:43:28,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035722141] [2020-10-15 16:43:28,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:43:28,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:28,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:43:28,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:43:28,971 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 16:43:29,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:29,466 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-10-15 16:43:29,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:43:29,466 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 16:43:29,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:29,467 INFO L225 Difference]: With dead ends: 107 [2020-10-15 16:43:29,467 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 16:43:29,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:43:29,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 16:43:29,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-10-15 16:43:29,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:43:29,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 16:43:29,470 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 16:43:29,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:29,470 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 16:43:29,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:43:29,471 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 16:43:29,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:43:29,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:29,471 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:29,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-10-15 16:43:29,673 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:29,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:29,673 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-10-15 16:43:29,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:29,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605199621] [2020-10-15 16:43:29,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:29,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:29,837 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:29,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605199621] [2020-10-15 16:43:29,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755489347] [2020-10-15 16:43:29,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:29,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 16:43:29,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:29,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:43:29,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:29,900 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:29,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:29,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 16:43:29,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867520478] [2020-10-15 16:43:29,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:29,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:29,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:29,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:29,902 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 16:43:30,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:30,340 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-15 16:43:30,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:43:30,341 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 16:43:30,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:30,342 INFO L225 Difference]: With dead ends: 104 [2020-10-15 16:43:30,342 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 16:43:30,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:43:30,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 16:43:30,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-10-15 16:43:30,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 16:43:30,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 16:43:30,344 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 16:43:30,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:30,344 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 16:43:30,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:30,345 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 16:43:30,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:43:30,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:30,345 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:30,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-15 16:43:30,546 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:30,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:30,546 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-10-15 16:43:30,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:30,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710181410] [2020-10-15 16:43:30,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:30,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:30,720 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:30,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710181410] [2020-10-15 16:43:30,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845906915] [2020-10-15 16:43:30,721 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:30,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 16:43:30,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:30,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:43:30,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:30,789 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:30,799 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:30,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:30,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 16:43:30,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724823330] [2020-10-15 16:43:30,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:43:30,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:30,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:43:30,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:43:30,800 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 16:43:31,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:31,376 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-10-15 16:43:31,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:43:31,377 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 16:43:31,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:31,378 INFO L225 Difference]: With dead ends: 103 [2020-10-15 16:43:31,378 INFO L226 Difference]: Without dead ends: 97 [2020-10-15 16:43:31,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:43:31,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-15 16:43:31,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-10-15 16:43:31,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:43:31,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 16:43:31,380 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 16:43:31,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:31,381 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 16:43:31,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:43:31,381 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 16:43:31,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:43:31,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:31,382 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:31,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-10-15 16:43:31,591 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:31,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:31,591 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-10-15 16:43:31,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:31,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478246457] [2020-10-15 16:43:31,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:31,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:31,758 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:31,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478246457] [2020-10-15 16:43:31,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517689715] [2020-10-15 16:43:31,759 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:31,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:31,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:43:31,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:31,823 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:31,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:31,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 16:43:31,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421467953] [2020-10-15 16:43:31,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:31,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:31,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:31,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:31,825 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 16:43:32,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:32,320 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-10-15 16:43:32,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:43:32,321 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 16:43:32,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:32,322 INFO L225 Difference]: With dead ends: 100 [2020-10-15 16:43:32,322 INFO L226 Difference]: Without dead ends: 94 [2020-10-15 16:43:32,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 16:43:32,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-15 16:43:32,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-10-15 16:43:32,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 16:43:32,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 16:43:32,324 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 16:43:32,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:32,324 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 16:43:32,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:32,324 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 16:43:32,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:43:32,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:32,325 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:32,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:32,534 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:32,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:32,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-10-15 16:43:32,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:32,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518862793] [2020-10-15 16:43:32,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:32,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:32,699 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:32,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518862793] [2020-10-15 16:43:32,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204419908] [2020-10-15 16:43:32,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:32,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:32,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:32,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:43:32,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:32,763 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:32,774 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:32,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:32,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 16:43:32,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845946478] [2020-10-15 16:43:32,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:43:32,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:32,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:43:32,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:43:32,776 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 16:43:33,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:33,425 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-15 16:43:33,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:43:33,425 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 16:43:33,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:33,426 INFO L225 Difference]: With dead ends: 99 [2020-10-15 16:43:33,426 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 16:43:33,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 16:43:33,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 16:43:33,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-10-15 16:43:33,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:43:33,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 16:43:33,429 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 16:43:33,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:33,429 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 16:43:33,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:43:33,429 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 16:43:33,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:43:33,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:33,430 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:33,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-10-15 16:43:33,638 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:33,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:33,639 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-10-15 16:43:33,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:33,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149988127] [2020-10-15 16:43:33,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:33,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:33,790 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:33,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149988127] [2020-10-15 16:43:33,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363278054] [2020-10-15 16:43:33,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:33,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 16:43:33,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:33,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:43:33,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:33,854 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:33,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:33,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 16:43:33,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063595154] [2020-10-15 16:43:33,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:33,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:33,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:33,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:33,855 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 16:43:34,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:34,399 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-15 16:43:34,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:43:34,400 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 16:43:34,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:34,400 INFO L225 Difference]: With dead ends: 96 [2020-10-15 16:43:34,400 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 16:43:34,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:43:34,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 16:43:34,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-10-15 16:43:34,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 16:43:34,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 16:43:34,403 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 16:43:34,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:34,403 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 16:43:34,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:34,404 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 16:43:34,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:43:34,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:34,404 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:34,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:34,607 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:34,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:34,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-10-15 16:43:34,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:34,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075556140] [2020-10-15 16:43:34,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:34,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:34,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075556140] [2020-10-15 16:43:34,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742369281] [2020-10-15 16:43:34,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:34,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:34,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:34,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:43:34,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:34,830 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:34,843 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:34,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:34,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 16:43:34,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756165594] [2020-10-15 16:43:34,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:43:34,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:34,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:43:34,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:43:34,844 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 16:43:35,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:35,575 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-15 16:43:35,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:43:35,576 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 16:43:35,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:35,577 INFO L225 Difference]: With dead ends: 95 [2020-10-15 16:43:35,577 INFO L226 Difference]: Without dead ends: 89 [2020-10-15 16:43:35,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:43:35,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-15 16:43:35,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-10-15 16:43:35,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:43:35,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 16:43:35,579 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 16:43:35,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:35,580 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 16:43:35,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:43:35,580 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 16:43:35,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:43:35,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:35,580 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:35,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:35,781 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:35,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:35,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-10-15 16:43:35,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:35,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770482316] [2020-10-15 16:43:35,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:35,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:35,956 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:35,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770482316] [2020-10-15 16:43:35,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863027972] [2020-10-15 16:43:35,956 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:36,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 16:43:36,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:36,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:43:36,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:36,047 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:36,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:36,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 16:43:36,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361351554] [2020-10-15 16:43:36,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:36,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:36,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:36,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:36,049 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 16:43:36,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:36,650 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-15 16:43:36,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:43:36,651 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 16:43:36,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:36,651 INFO L225 Difference]: With dead ends: 92 [2020-10-15 16:43:36,651 INFO L226 Difference]: Without dead ends: 86 [2020-10-15 16:43:36,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 16:43:36,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-15 16:43:36,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-10-15 16:43:36,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 16:43:36,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 16:43:36,654 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 16:43:36,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:36,655 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 16:43:36,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:36,655 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 16:43:36,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:43:36,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:36,656 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:36,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:36,864 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:36,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:36,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-10-15 16:43:36,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:36,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48464234] [2020-10-15 16:43:36,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:37,013 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:37,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48464234] [2020-10-15 16:43:37,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030521276] [2020-10-15 16:43:37,013 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:37,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 16:43:37,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:37,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:43:37,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:37,083 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:37,096 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:37,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:37,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 16:43:37,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514259292] [2020-10-15 16:43:37,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:43:37,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:37,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:43:37,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:43:37,098 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 16:43:37,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:37,932 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-10-15 16:43:37,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:43:37,933 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 16:43:37,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:37,934 INFO L225 Difference]: With dead ends: 91 [2020-10-15 16:43:37,934 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 16:43:37,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 16:43:37,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 16:43:37,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-10-15 16:43:37,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:43:37,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 16:43:37,937 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 16:43:37,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:37,937 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 16:43:37,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:43:37,938 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 16:43:37,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:43:37,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:37,938 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:38,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:38,146 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:38,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:38,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-10-15 16:43:38,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:38,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750267235] [2020-10-15 16:43:38,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:38,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:38,299 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:38,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750267235] [2020-10-15 16:43:38,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274175540] [2020-10-15 16:43:38,300 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:38,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:38,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:43:38,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:38,362 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:38,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:38,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 16:43:38,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138978309] [2020-10-15 16:43:38,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:38,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:38,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:38,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:38,363 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 16:43:39,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:39,012 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-15 16:43:39,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:43:39,013 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 16:43:39,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:39,014 INFO L225 Difference]: With dead ends: 107 [2020-10-15 16:43:39,014 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 16:43:39,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:43:39,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 16:43:39,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-10-15 16:43:39,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 16:43:39,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-10-15 16:43:39,017 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-10-15 16:43:39,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:39,017 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-10-15 16:43:39,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:39,017 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-10-15 16:43:39,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:43:39,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:39,018 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:39,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-15 16:43:39,223 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:39,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:39,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-10-15 16:43:39,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:39,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227307318] [2020-10-15 16:43:39,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:39,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:39,371 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:39,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227307318] [2020-10-15 16:43:39,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558616307] [2020-10-15 16:43:39,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:39,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:39,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:39,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:43:39,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:39,436 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:39,448 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:39,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:39,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 16:43:39,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693935630] [2020-10-15 16:43:39,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:43:39,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:39,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:43:39,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:43:39,450 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-10-15 16:43:40,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:40,289 INFO L93 Difference]: Finished difference Result 88 states and 217 transitions. [2020-10-15 16:43:40,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:43:40,290 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 16:43:40,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:40,290 INFO L225 Difference]: With dead ends: 88 [2020-10-15 16:43:40,290 INFO L226 Difference]: Without dead ends: 80 [2020-10-15 16:43:40,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 16:43:40,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-15 16:43:40,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-10-15 16:43:40,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 16:43:40,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-10-15 16:43:40,292 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-10-15 16:43:40,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:40,292 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-10-15 16:43:40,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:43:40,293 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-10-15 16:43:40,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:43:40,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:40,293 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:40,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-10-15 16:43:40,494 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:40,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:40,494 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-10-15 16:43:40,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:40,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639017428] [2020-10-15 16:43:40,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:40,642 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:40,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639017428] [2020-10-15 16:43:40,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871214451] [2020-10-15 16:43:40,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:40,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 16:43:40,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:40,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:43:40,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:40,713 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:43:40,730 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:40,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:40,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 16:43:40,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536209065] [2020-10-15 16:43:40,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:43:40,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:40,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:43:40,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:43:40,731 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-10-15 16:43:41,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:41,506 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-10-15 16:43:41,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:43:41,507 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 16:43:41,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:41,508 INFO L225 Difference]: With dead ends: 100 [2020-10-15 16:43:41,508 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 16:43:41,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 16:43:41,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 16:43:41,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-10-15 16:43:41,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 16:43:41,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-15 16:43:41,510 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-10-15 16:43:41,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:41,511 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-15 16:43:41,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:43:41,511 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-15 16:43:41,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:43:41,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:41,511 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:41,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-15 16:43:41,712 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:41,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:41,713 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-10-15 16:43:41,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:41,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158017653] [2020-10-15 16:43:41,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:41,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:41,875 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:41,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158017653] [2020-10-15 16:43:41,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568745560] [2020-10-15 16:43:41,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:41,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:41,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:41,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:43:41,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:41,940 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:43:41,958 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:41,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:41,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 16:43:41,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703777637] [2020-10-15 16:43:41,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:43:41,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:41,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:43:41,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:43:41,960 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-10-15 16:43:42,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:42,807 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-10-15 16:43:42,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:43:42,808 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 16:43:42,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:42,808 INFO L225 Difference]: With dead ends: 84 [2020-10-15 16:43:42,808 INFO L226 Difference]: Without dead ends: 79 [2020-10-15 16:43:42,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 16:43:42,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-15 16:43:42,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-10-15 16:43:42,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 16:43:42,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-10-15 16:43:42,811 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-10-15 16:43:42,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:42,811 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-10-15 16:43:42,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:43:42,811 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-10-15 16:43:42,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:43:42,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:42,812 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:43,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-15 16:43:43,012 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:43,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:43,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-10-15 16:43:43,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:43,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622527905] [2020-10-15 16:43:43,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:43,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:43,233 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:43,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622527905] [2020-10-15 16:43:43,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414718321] [2020-10-15 16:43:43,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:43,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 16:43:43,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:43,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:43:43,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:43,305 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:43,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:43,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 16:43:43,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280412610] [2020-10-15 16:43:43,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:43:43,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:43,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:43:43,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:43:43,306 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-10-15 16:43:43,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:43,665 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-10-15 16:43:43,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:43:43,666 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 16:43:43,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:43,666 INFO L225 Difference]: With dead ends: 90 [2020-10-15 16:43:43,666 INFO L226 Difference]: Without dead ends: 84 [2020-10-15 16:43:43,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:43:43,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-15 16:43:43,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-10-15 16:43:43,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 16:43:43,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-10-15 16:43:43,669 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-10-15 16:43:43,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:43,669 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-10-15 16:43:43,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:43:43,669 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-10-15 16:43:43,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:43:43,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:43,670 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:43,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:43,876 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:43,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:43,876 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-10-15 16:43:43,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:43,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521456987] [2020-10-15 16:43:43,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:43,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:44,102 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:44,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521456987] [2020-10-15 16:43:44,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062102839] [2020-10-15 16:43:44,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:44,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 16:43:44,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:44,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:43:44,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:44,172 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:44,182 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:44,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:44,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 16:43:44,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192276092] [2020-10-15 16:43:44,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:43:44,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:44,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:43:44,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:43:44,184 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-10-15 16:43:44,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:44,558 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-10-15 16:43:44,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:43:44,559 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 16:43:44,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:44,560 INFO L225 Difference]: With dead ends: 106 [2020-10-15 16:43:44,560 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 16:43:44,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:43:44,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 16:43:44,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-15 16:43:44,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 16:43:44,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-10-15 16:43:44,564 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-10-15 16:43:44,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:44,564 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-10-15 16:43:44,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:43:44,564 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-10-15 16:43:44,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:43:44,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:44,564 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:44,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-10-15 16:43:44,768 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:44,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:44,769 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-10-15 16:43:44,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:44,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162409935] [2020-10-15 16:43:44,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:44,976 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:44,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162409935] [2020-10-15 16:43:44,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4643494] [2020-10-15 16:43:44,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:45,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:45,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:43:45,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:45,032 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:45,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:45,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 16:43:45,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628490498] [2020-10-15 16:43:45,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:43:45,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:45,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:43:45,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:43:45,034 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-10-15 16:43:45,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:45,477 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-10-15 16:43:45,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:43:45,478 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 16:43:45,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:45,479 INFO L225 Difference]: With dead ends: 107 [2020-10-15 16:43:45,479 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 16:43:45,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:43:45,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 16:43:45,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-15 16:43:45,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-15 16:43:45,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-10-15 16:43:45,481 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-10-15 16:43:45,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:45,482 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-10-15 16:43:45,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:43:45,482 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-10-15 16:43:45,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:43:45,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:45,482 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:45,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-15 16:43:45,682 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:45,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:45,683 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-10-15 16:43:45,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:45,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810676149] [2020-10-15 16:43:45,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:45,906 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:45,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810676149] [2020-10-15 16:43:45,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446862148] [2020-10-15 16:43:45,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:45,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:45,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:45,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:43:45,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:45,974 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:45,984 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:45,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:45,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 16:43:45,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910929755] [2020-10-15 16:43:45,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:43:45,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:45,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:43:45,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:43:45,985 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-10-15 16:43:46,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:46,488 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-10-15 16:43:46,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:43:46,488 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 16:43:46,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:46,489 INFO L225 Difference]: With dead ends: 119 [2020-10-15 16:43:46,489 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 16:43:46,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 16:43:46,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 16:43:46,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-10-15 16:43:46,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 16:43:46,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-10-15 16:43:46,492 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-10-15 16:43:46,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:46,492 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-10-15 16:43:46,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:43:46,492 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-10-15 16:43:46,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:43:46,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:46,492 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:46,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-10-15 16:43:46,699 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:46,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:46,700 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-10-15 16:43:46,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:46,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587672822] [2020-10-15 16:43:46,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:46,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:46,898 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:46,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587672822] [2020-10-15 16:43:46,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090905692] [2020-10-15 16:43:46,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:46,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 16:43:46,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:46,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:43:46,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:46,960 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:46,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:46,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 16:43:46,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884340860] [2020-10-15 16:43:46,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:43:46,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:46,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:43:46,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:43:46,961 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-10-15 16:43:47,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:47,435 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-10-15 16:43:47,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:43:47,435 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 16:43:47,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:47,436 INFO L225 Difference]: With dead ends: 119 [2020-10-15 16:43:47,436 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 16:43:47,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:43:47,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 16:43:47,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-10-15 16:43:47,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 16:43:47,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-10-15 16:43:47,438 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-10-15 16:43:47,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:47,439 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-10-15 16:43:47,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:43:47,439 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-10-15 16:43:47,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:43:47,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:47,440 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:47,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:47,646 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:47,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:47,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-10-15 16:43:47,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:47,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699406405] [2020-10-15 16:43:47,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:47,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:47,847 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:47,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699406405] [2020-10-15 16:43:47,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297268388] [2020-10-15 16:43:47,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:47,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:47,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:47,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:43:47,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:47,916 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:47,932 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:47,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:47,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 16:43:47,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057634330] [2020-10-15 16:43:47,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:43:47,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:47,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:43:47,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:43:47,934 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-10-15 16:43:48,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:48,485 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-10-15 16:43:48,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:43:48,486 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 16:43:48,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:48,486 INFO L225 Difference]: With dead ends: 116 [2020-10-15 16:43:48,486 INFO L226 Difference]: Without dead ends: 110 [2020-10-15 16:43:48,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:43:48,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-15 16:43:48,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-10-15 16:43:48,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 16:43:48,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-10-15 16:43:48,488 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-10-15 16:43:48,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:48,488 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-10-15 16:43:48,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:43:48,489 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-10-15 16:43:48,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:43:48,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:48,489 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:48,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:48,690 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:48,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:48,690 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-10-15 16:43:48,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:48,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340862472] [2020-10-15 16:43:48,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:48,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:48,876 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:48,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340862472] [2020-10-15 16:43:48,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406524775] [2020-10-15 16:43:48,877 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:48,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 16:43:48,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:48,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:43:48,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:48,948 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:48,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:48,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 16:43:48,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634403995] [2020-10-15 16:43:48,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:43:48,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:48,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:43:48,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:43:48,950 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-10-15 16:43:49,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:49,469 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-10-15 16:43:49,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:43:49,469 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 16:43:49,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:49,470 INFO L225 Difference]: With dead ends: 117 [2020-10-15 16:43:49,470 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 16:43:49,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 16:43:49,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 16:43:49,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-10-15 16:43:49,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 16:43:49,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-10-15 16:43:49,471 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-10-15 16:43:49,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:49,472 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-10-15 16:43:49,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:43:49,472 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-10-15 16:43:49,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:43:49,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:49,472 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:49,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:49,675 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:49,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:49,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-10-15 16:43:49,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:49,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418955084] [2020-10-15 16:43:49,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:49,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418955084] [2020-10-15 16:43:49,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249230416] [2020-10-15 16:43:49,870 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:49,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 16:43:49,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:49,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:43:49,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:49,950 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:49,961 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:49,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:49,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 16:43:49,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793544720] [2020-10-15 16:43:49,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:43:49,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:49,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:43:49,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:43:49,962 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-10-15 16:43:50,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:50,600 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-10-15 16:43:50,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:43:50,601 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 16:43:50,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:50,602 INFO L225 Difference]: With dead ends: 114 [2020-10-15 16:43:50,602 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 16:43:50,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 16:43:50,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 16:43:50,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-10-15 16:43:50,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 16:43:50,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-10-15 16:43:50,604 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-10-15 16:43:50,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:50,604 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-10-15 16:43:50,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:43:50,605 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-10-15 16:43:50,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:43:50,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:50,605 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:50,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-15 16:43:50,806 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:50,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:50,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-10-15 16:43:50,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:50,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475213907] [2020-10-15 16:43:50,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:50,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:50,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475213907] [2020-10-15 16:43:50,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154227992] [2020-10-15 16:43:50,984 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:51,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:43:51,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:51,039 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:51,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:51,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 16:43:51,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868819937] [2020-10-15 16:43:51,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:43:51,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:51,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:43:51,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:43:51,040 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-10-15 16:43:51,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:51,660 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-10-15 16:43:51,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:43:51,660 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 16:43:51,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:51,661 INFO L225 Difference]: With dead ends: 115 [2020-10-15 16:43:51,661 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 16:43:51,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:43:51,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 16:43:51,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-10-15 16:43:51,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-15 16:43:51,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-10-15 16:43:51,664 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-10-15 16:43:51,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:51,664 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-10-15 16:43:51,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:43:51,664 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-10-15 16:43:51,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:43:51,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:51,665 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:51,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:51,871 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:51,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:51,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-10-15 16:43:51,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:51,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985765724] [2020-10-15 16:43:51,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:51,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:52,051 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:52,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985765724] [2020-10-15 16:43:52,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804784001] [2020-10-15 16:43:52,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:52,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:52,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:52,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:43:52,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:52,117 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:52,129 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:52,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:52,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 16:43:52,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387323517] [2020-10-15 16:43:52,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:43:52,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:52,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:43:52,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:43:52,131 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-10-15 16:43:52,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:52,845 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-10-15 16:43:52,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:43:52,846 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 16:43:52,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:52,846 INFO L225 Difference]: With dead ends: 112 [2020-10-15 16:43:52,846 INFO L226 Difference]: Without dead ends: 106 [2020-10-15 16:43:52,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:43:52,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-15 16:43:52,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-10-15 16:43:52,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-15 16:43:52,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-10-15 16:43:52,848 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-10-15 16:43:52,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:52,848 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-10-15 16:43:52,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:43:52,849 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-10-15 16:43:52,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:43:52,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:52,849 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:53,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-15 16:43:53,050 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:53,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:53,050 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-10-15 16:43:53,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:53,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790461770] [2020-10-15 16:43:53,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:53,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:53,222 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:53,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790461770] [2020-10-15 16:43:53,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768277244] [2020-10-15 16:43:53,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:53,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 16:43:53,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:53,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:43:53,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:53,287 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:53,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:53,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 16:43:53,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694858047] [2020-10-15 16:43:53,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:43:53,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:53,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:43:53,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:43:53,288 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-10-15 16:43:53,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:53,921 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-10-15 16:43:53,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:43:53,921 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 16:43:53,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:53,922 INFO L225 Difference]: With dead ends: 113 [2020-10-15 16:43:53,922 INFO L226 Difference]: Without dead ends: 107 [2020-10-15 16:43:53,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 16:43:53,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-15 16:43:53,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-10-15 16:43:53,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 16:43:53,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 16:43:53,925 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-10-15 16:43:53,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:53,925 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 16:43:53,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:43:53,925 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 16:43:53,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:43:53,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:53,926 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:54,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-15 16:43:54,126 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:54,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:54,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-10-15 16:43:54,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:54,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125632411] [2020-10-15 16:43:54,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:54,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:54,301 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:54,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125632411] [2020-10-15 16:43:54,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043722942] [2020-10-15 16:43:54,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:54,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:54,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:54,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:43:54,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:54,366 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:54,379 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:54,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:54,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 16:43:54,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495794658] [2020-10-15 16:43:54,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:43:54,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:54,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:43:54,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:43:54,381 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-10-15 16:43:55,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:55,168 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-10-15 16:43:55,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:43:55,168 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 16:43:55,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:55,169 INFO L225 Difference]: With dead ends: 110 [2020-10-15 16:43:55,169 INFO L226 Difference]: Without dead ends: 104 [2020-10-15 16:43:55,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 16:43:55,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-15 16:43:55,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-10-15 16:43:55,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:43:55,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 16:43:55,171 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-10-15 16:43:55,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:55,171 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 16:43:55,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:43:55,171 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 16:43:55,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:43:55,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:55,172 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:55,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-10-15 16:43:55,372 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:55,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:55,373 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-10-15 16:43:55,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:55,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964184877] [2020-10-15 16:43:55,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:55,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:55,542 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:55,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964184877] [2020-10-15 16:43:55,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480642872] [2020-10-15 16:43:55,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:55,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 16:43:55,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:55,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:43:55,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:55,613 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:55,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:55,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 16:43:55,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033539382] [2020-10-15 16:43:55,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:43:55,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:55,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:43:55,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:43:55,614 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-10-15 16:43:56,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:56,383 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-10-15 16:43:56,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 16:43:56,386 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 16:43:56,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:56,386 INFO L225 Difference]: With dead ends: 111 [2020-10-15 16:43:56,386 INFO L226 Difference]: Without dead ends: 105 [2020-10-15 16:43:56,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 16:43:56,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-15 16:43:56,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-10-15 16:43:56,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 16:43:56,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-10-15 16:43:56,388 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-10-15 16:43:56,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:56,388 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-10-15 16:43:56,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:43:56,388 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-10-15 16:43:56,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:43:56,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:56,389 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:56,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:56,589 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:56,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:56,590 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-10-15 16:43:56,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:56,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8818732] [2020-10-15 16:43:56,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:56,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:56,757 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:56,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8818732] [2020-10-15 16:43:56,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450840173] [2020-10-15 16:43:56,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:56,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 16:43:56,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:56,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:43:56,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:56,828 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:56,842 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:56,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:56,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 16:43:56,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395611052] [2020-10-15 16:43:56,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:43:56,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:56,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:43:56,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:43:56,844 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-10-15 16:43:57,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:57,717 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-10-15 16:43:57,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:43:57,718 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 16:43:57,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:57,718 INFO L225 Difference]: With dead ends: 108 [2020-10-15 16:43:57,718 INFO L226 Difference]: Without dead ends: 102 [2020-10-15 16:43:57,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=694, Invalid=1658, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 16:43:57,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-15 16:43:57,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-10-15 16:43:57,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 16:43:57,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-15 16:43:57,720 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-10-15 16:43:57,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:57,721 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-15 16:43:57,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:43:57,721 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-15 16:43:57,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:43:57,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:57,721 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:57,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-15 16:43:57,922 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:57,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:57,922 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-10-15 16:43:57,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:57,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052485773] [2020-10-15 16:43:57,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:57,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:58,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052485773] [2020-10-15 16:43:58,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094426054] [2020-10-15 16:43:58,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:58,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:58,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:43:58,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:58,151 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:58,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:58,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 16:43:58,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961121545] [2020-10-15 16:43:58,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:43:58,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:58,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:43:58,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:43:58,153 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-10-15 16:43:58,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:58,891 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-10-15 16:43:58,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:43:58,893 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 16:43:58,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:58,894 INFO L225 Difference]: With dead ends: 128 [2020-10-15 16:43:58,894 INFO L226 Difference]: Without dead ends: 122 [2020-10-15 16:43:58,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 16:43:58,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-15 16:43:58,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-10-15 16:43:58,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 16:43:58,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-10-15 16:43:58,896 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-10-15 16:43:58,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:58,896 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-10-15 16:43:58,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:43:58,897 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-10-15 16:43:58,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:43:58,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:58,897 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:59,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:59,106 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:59,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:59,106 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-10-15 16:43:59,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:59,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946707696] [2020-10-15 16:43:59,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:59,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:59,273 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:59,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946707696] [2020-10-15 16:43:59,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217820990] [2020-10-15 16:43:59,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:59,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:59,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:59,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:43:59,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:59,337 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:59,350 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:59,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:59,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 16:43:59,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236221635] [2020-10-15 16:43:59,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:43:59,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:59,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:43:59,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:43:59,352 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-10-15 16:44:00,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:00,262 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-10-15 16:44:00,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:44:00,262 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 16:44:00,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:00,263 INFO L225 Difference]: With dead ends: 109 [2020-10-15 16:44:00,263 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 16:44:00,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 16:44:00,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 16:44:00,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-10-15 16:44:00,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 16:44:00,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-10-15 16:44:00,266 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-10-15 16:44:00,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:00,266 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-10-15 16:44:00,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:00,266 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-10-15 16:44:00,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:00,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:00,266 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:00,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:00,467 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:00,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:00,468 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-10-15 16:44:00,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:00,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217789629] [2020-10-15 16:44:00,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:00,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:00,697 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:00,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217789629] [2020-10-15 16:44:00,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705264085] [2020-10-15 16:44:00,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:00,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 16:44:00,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:00,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:00,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:00,757 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:00,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:00,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 16:44:00,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757771905] [2020-10-15 16:44:00,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:00,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:00,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:00,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:00,759 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-10-15 16:44:01,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:01,169 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-10-15 16:44:01,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:44:01,169 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 16:44:01,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:01,170 INFO L225 Difference]: With dead ends: 124 [2020-10-15 16:44:01,170 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 16:44:01,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:44:01,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 16:44:01,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-10-15 16:44:01,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:44:01,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 16:44:01,172 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 16:44:01,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:01,173 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 16:44:01,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:01,173 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 16:44:01,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:01,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:01,173 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:01,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:01,379 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:01,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:01,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-10-15 16:44:01,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:01,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229930324] [2020-10-15 16:44:01,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:01,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:01,659 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:01,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229930324] [2020-10-15 16:44:01,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561561022] [2020-10-15 16:44:01,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:01,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:44:01,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:01,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:01,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:01,730 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:01,741 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:01,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:01,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 16:44:01,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578427220] [2020-10-15 16:44:01,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:01,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:01,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:01,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:01,742 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 16:44:02,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:02,262 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-15 16:44:02,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:44:02,263 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 16:44:02,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:02,264 INFO L225 Difference]: With dead ends: 121 [2020-10-15 16:44:02,264 INFO L226 Difference]: Without dead ends: 115 [2020-10-15 16:44:02,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:44:02,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-15 16:44:02,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-10-15 16:44:02,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:44:02,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 16:44:02,266 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 16:44:02,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:02,266 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 16:44:02,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:02,267 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 16:44:02,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:02,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:02,267 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:02,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:02,468 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:02,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:02,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-10-15 16:44:02,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:02,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675931172] [2020-10-15 16:44:02,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:02,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:02,699 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:02,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675931172] [2020-10-15 16:44:02,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173392083] [2020-10-15 16:44:02,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:02,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 16:44:02,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:02,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:02,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:02,761 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:02,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:02,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 16:44:02,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4459059] [2020-10-15 16:44:02,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:02,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:02,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:02,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:02,763 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 16:44:03,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:03,236 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-15 16:44:03,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:44:03,237 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 16:44:03,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:03,238 INFO L225 Difference]: With dead ends: 118 [2020-10-15 16:44:03,238 INFO L226 Difference]: Without dead ends: 112 [2020-10-15 16:44:03,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 16:44:03,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-15 16:44:03,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-10-15 16:44:03,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:44:03,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 16:44:03,240 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 16:44:03,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:03,241 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 16:44:03,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:03,241 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 16:44:03,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:03,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:03,241 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:03,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:03,442 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:03,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:03,443 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-10-15 16:44:03,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:03,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156421876] [2020-10-15 16:44:03,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:03,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:03,669 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:03,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156421876] [2020-10-15 16:44:03,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728775335] [2020-10-15 16:44:03,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:03,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 16:44:03,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:03,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:03,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:03,741 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:03,752 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:03,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:03,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 16:44:03,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562105337] [2020-10-15 16:44:03,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:03,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:03,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:03,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:03,754 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 16:44:04,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:04,351 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-10-15 16:44:04,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:44:04,351 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 16:44:04,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:04,352 INFO L225 Difference]: With dead ends: 117 [2020-10-15 16:44:04,352 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 16:44:04,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 16:44:04,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 16:44:04,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-10-15 16:44:04,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:44:04,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 16:44:04,354 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 16:44:04,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:04,355 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 16:44:04,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:04,355 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 16:44:04,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:04,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:04,355 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:04,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-15 16:44:04,556 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:04,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:04,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-10-15 16:44:04,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:04,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602761071] [2020-10-15 16:44:04,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:04,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:04,776 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:04,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602761071] [2020-10-15 16:44:04,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026813808] [2020-10-15 16:44:04,777 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:04,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:04,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:04,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:04,834 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:04,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:04,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 16:44:04,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870904463] [2020-10-15 16:44:04,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:04,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:04,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:04,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:04,835 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 16:44:05,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:05,368 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-10-15 16:44:05,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:44:05,368 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 16:44:05,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:05,369 INFO L225 Difference]: With dead ends: 114 [2020-10-15 16:44:05,369 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 16:44:05,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:44:05,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 16:44:05,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-10-15 16:44:05,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:44:05,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 16:44:05,371 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 16:44:05,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:05,371 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 16:44:05,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:05,372 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 16:44:05,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:05,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:05,372 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:05,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-15 16:44:05,576 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:05,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:05,576 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-10-15 16:44:05,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:05,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236163571] [2020-10-15 16:44:05,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:05,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:05,801 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:05,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236163571] [2020-10-15 16:44:05,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431924082] [2020-10-15 16:44:05,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:05,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:44:05,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:05,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:05,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:05,869 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:05,881 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:05,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:05,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 16:44:05,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356737518] [2020-10-15 16:44:05,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:05,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:05,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:05,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:05,882 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 16:44:06,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:06,560 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-10-15 16:44:06,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:44:06,560 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 16:44:06,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:06,561 INFO L225 Difference]: With dead ends: 113 [2020-10-15 16:44:06,561 INFO L226 Difference]: Without dead ends: 107 [2020-10-15 16:44:06,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:44:06,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-15 16:44:06,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-10-15 16:44:06,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:44:06,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 16:44:06,563 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 16:44:06,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:06,563 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 16:44:06,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:06,564 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 16:44:06,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:06,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:06,564 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:06,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-15 16:44:06,772 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:06,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:06,773 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-10-15 16:44:06,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:06,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785793544] [2020-10-15 16:44:06,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:06,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:06,979 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:06,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785793544] [2020-10-15 16:44:06,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712837602] [2020-10-15 16:44:06,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:07,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 16:44:07,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:07,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:07,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:07,048 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:07,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:07,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 16:44:07,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135749491] [2020-10-15 16:44:07,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:07,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:07,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:07,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:07,049 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 16:44:07,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:07,642 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-10-15 16:44:07,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:44:07,643 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 16:44:07,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:07,643 INFO L225 Difference]: With dead ends: 110 [2020-10-15 16:44:07,644 INFO L226 Difference]: Without dead ends: 104 [2020-10-15 16:44:07,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 16:44:07,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-15 16:44:07,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-10-15 16:44:07,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:44:07,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 16:44:07,647 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 16:44:07,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:07,647 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 16:44:07,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:07,647 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 16:44:07,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:07,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:07,648 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:07,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-15 16:44:07,855 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:07,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:07,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-10-15 16:44:07,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:07,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287392092] [2020-10-15 16:44:07,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:07,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:08,068 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:08,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287392092] [2020-10-15 16:44:08,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601883238] [2020-10-15 16:44:08,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:08,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:44:08,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:08,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:08,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:08,136 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:08,148 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:08,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:08,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 16:44:08,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766248411] [2020-10-15 16:44:08,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:08,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:08,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:08,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:08,149 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 16:44:08,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:08,915 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-10-15 16:44:08,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:44:08,916 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 16:44:08,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:08,916 INFO L225 Difference]: With dead ends: 109 [2020-10-15 16:44:08,916 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 16:44:08,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 16:44:08,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 16:44:08,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-10-15 16:44:08,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:44:08,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 16:44:08,919 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 16:44:08,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:08,919 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 16:44:08,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:08,919 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 16:44:08,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:08,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:08,919 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:09,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:09,120 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:09,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:09,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-10-15 16:44:09,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:09,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055707146] [2020-10-15 16:44:09,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:09,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:09,326 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:09,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055707146] [2020-10-15 16:44:09,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866674599] [2020-10-15 16:44:09,327 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:09,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 16:44:09,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:09,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:09,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:09,403 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:09,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:09,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 16:44:09,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076872957] [2020-10-15 16:44:09,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:09,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:09,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:09,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:09,404 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 16:44:10,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:10,083 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-10-15 16:44:10,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:44:10,083 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 16:44:10,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:10,084 INFO L225 Difference]: With dead ends: 106 [2020-10-15 16:44:10,084 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 16:44:10,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:44:10,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 16:44:10,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-10-15 16:44:10,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:44:10,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 16:44:10,086 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 16:44:10,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:10,086 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 16:44:10,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:10,086 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 16:44:10,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:10,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:10,087 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:10,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-10-15 16:44:10,288 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:10,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:10,288 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-10-15 16:44:10,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:10,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350488174] [2020-10-15 16:44:10,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:10,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:10,495 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:10,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350488174] [2020-10-15 16:44:10,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658520154] [2020-10-15 16:44:10,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:10,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 16:44:10,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:10,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:10,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:10,565 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:10,584 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:10,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:10,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 16:44:10,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658130450] [2020-10-15 16:44:10,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:10,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:10,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:10,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:10,585 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 16:44:11,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:11,430 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-10-15 16:44:11,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:44:11,430 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 16:44:11,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:11,431 INFO L225 Difference]: With dead ends: 105 [2020-10-15 16:44:11,431 INFO L226 Difference]: Without dead ends: 99 [2020-10-15 16:44:11,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 16:44:11,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-15 16:44:11,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-10-15 16:44:11,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:44:11,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 16:44:11,433 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 16:44:11,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:11,434 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 16:44:11,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:11,434 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 16:44:11,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:11,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:11,434 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:11,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:11,635 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:11,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:11,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-10-15 16:44:11,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:11,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531434063] [2020-10-15 16:44:11,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:11,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:11,831 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:11,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531434063] [2020-10-15 16:44:11,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973452914] [2020-10-15 16:44:11,832 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:11,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:11,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:11,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:11,897 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:11,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:11,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 16:44:11,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078656867] [2020-10-15 16:44:11,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:11,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:11,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:11,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:11,899 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 16:44:12,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:12,636 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-10-15 16:44:12,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:44:12,637 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 16:44:12,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:12,637 INFO L225 Difference]: With dead ends: 102 [2020-10-15 16:44:12,637 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 16:44:12,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 16:44:12,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 16:44:12,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-10-15 16:44:12,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:44:12,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 16:44:12,640 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 16:44:12,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:12,640 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 16:44:12,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:12,640 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 16:44:12,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:12,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:12,641 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:12,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:12,841 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:12,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:12,842 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-10-15 16:44:12,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:12,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914270949] [2020-10-15 16:44:12,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:13,047 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:13,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914270949] [2020-10-15 16:44:13,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144031347] [2020-10-15 16:44:13,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:13,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:44:13,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:13,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:13,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:13,119 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:13,132 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:13,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:13,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 16:44:13,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057133879] [2020-10-15 16:44:13,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:13,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:13,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:13,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:13,134 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 16:44:14,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:14,100 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-15 16:44:14,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:44:14,101 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 16:44:14,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:14,101 INFO L225 Difference]: With dead ends: 101 [2020-10-15 16:44:14,101 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 16:44:14,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 16:44:14,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 16:44:14,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-10-15 16:44:14,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:44:14,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 16:44:14,104 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 16:44:14,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:14,104 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 16:44:14,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:14,104 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 16:44:14,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:14,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:14,104 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:14,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-10-15 16:44:14,311 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:14,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:14,311 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-10-15 16:44:14,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:14,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782214262] [2020-10-15 16:44:14,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:14,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:14,502 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:14,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782214262] [2020-10-15 16:44:14,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237793683] [2020-10-15 16:44:14,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:14,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 16:44:14,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:14,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:14,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:14,578 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:14,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:14,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 16:44:14,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732652235] [2020-10-15 16:44:14,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:14,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:14,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:14,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:14,580 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 16:44:15,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:15,361 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-10-15 16:44:15,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 16:44:15,362 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 16:44:15,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:15,363 INFO L225 Difference]: With dead ends: 98 [2020-10-15 16:44:15,363 INFO L226 Difference]: Without dead ends: 92 [2020-10-15 16:44:15,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 16:44:15,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-15 16:44:15,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-10-15 16:44:15,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:44:15,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 16:44:15,365 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 16:44:15,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:15,366 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 16:44:15,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:15,366 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 16:44:15,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:15,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:15,366 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:15,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:15,567 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:15,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:15,568 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-10-15 16:44:15,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:15,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46937681] [2020-10-15 16:44:15,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:15,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:15,756 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:15,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46937681] [2020-10-15 16:44:15,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361930297] [2020-10-15 16:44:15,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:15,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:44:15,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:15,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:15,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:15,824 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:15,838 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:15,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:15,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 16:44:15,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938230743] [2020-10-15 16:44:15,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:15,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:15,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:15,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:15,840 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 16:44:16,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:16,869 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-10-15 16:44:16,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:44:16,870 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 16:44:16,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:16,870 INFO L225 Difference]: With dead ends: 97 [2020-10-15 16:44:16,870 INFO L226 Difference]: Without dead ends: 91 [2020-10-15 16:44:16,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 16:44:16,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-15 16:44:16,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-10-15 16:44:16,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:44:16,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 16:44:16,873 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 16:44:16,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:16,873 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 16:44:16,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:16,873 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 16:44:16,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:16,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:16,873 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:17,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-15 16:44:17,074 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:17,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:17,075 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-10-15 16:44:17,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:17,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274044630] [2020-10-15 16:44:17,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:17,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:17,262 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:17,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274044630] [2020-10-15 16:44:17,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279929140] [2020-10-15 16:44:17,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:17,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 16:44:17,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:17,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:17,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:17,329 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:17,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:17,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 16:44:17,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063310773] [2020-10-15 16:44:17,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:17,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:17,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:17,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:17,331 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 16:44:18,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:18,165 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-10-15 16:44:18,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:44:18,166 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 16:44:18,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:18,166 INFO L225 Difference]: With dead ends: 113 [2020-10-15 16:44:18,166 INFO L226 Difference]: Without dead ends: 107 [2020-10-15 16:44:18,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 16:44:18,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-15 16:44:18,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-10-15 16:44:18,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-15 16:44:18,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-10-15 16:44:18,169 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-10-15 16:44:18,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:18,169 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-10-15 16:44:18,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:18,169 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-10-15 16:44:18,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:18,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:18,170 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:18,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-15 16:44:18,370 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:18,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:18,371 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-10-15 16:44:18,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:18,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065086835] [2020-10-15 16:44:18,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:18,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:18,560 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:18,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065086835] [2020-10-15 16:44:18,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685270379] [2020-10-15 16:44:18,561 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:18,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 16:44:18,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:18,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:18,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:18,632 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:18,647 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:18,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:18,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 16:44:18,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161260494] [2020-10-15 16:44:18,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:18,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:18,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:18,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:18,649 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-10-15 16:44:19,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:19,711 INFO L93 Difference]: Finished difference Result 94 states and 233 transitions. [2020-10-15 16:44:19,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 16:44:19,712 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 16:44:19,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:19,712 INFO L225 Difference]: With dead ends: 94 [2020-10-15 16:44:19,712 INFO L226 Difference]: Without dead ends: 86 [2020-10-15 16:44:19,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 16:44:19,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-15 16:44:19,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2020-10-15 16:44:19,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-15 16:44:19,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-10-15 16:44:19,714 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-10-15 16:44:19,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:19,715 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-10-15 16:44:19,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:19,715 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-10-15 16:44:19,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:19,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:19,715 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:19,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-15 16:44:19,916 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:19,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:19,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-10-15 16:44:19,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:19,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743541630] [2020-10-15 16:44:19,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:19,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:20,111 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:20,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743541630] [2020-10-15 16:44:20,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022224528] [2020-10-15 16:44:20,112 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:20,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:20,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:20,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:20,177 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:44:20,196 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:20,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:20,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 16:44:20,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697374791] [2020-10-15 16:44:20,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:20,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:20,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:20,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:20,197 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-10-15 16:44:21,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:21,177 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-15 16:44:21,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:44:21,177 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 16:44:21,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:21,178 INFO L225 Difference]: With dead ends: 108 [2020-10-15 16:44:21,178 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 16:44:21,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 16:44:21,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 16:44:21,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-10-15 16:44:21,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 16:44:21,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-15 16:44:21,180 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-10-15 16:44:21,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:21,181 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-15 16:44:21,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:21,181 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-15 16:44:21,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:21,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:21,181 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:21,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-15 16:44:21,382 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:21,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:21,383 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-10-15 16:44:21,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:21,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078265329] [2020-10-15 16:44:21,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:21,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:21,588 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:21,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078265329] [2020-10-15 16:44:21,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554475092] [2020-10-15 16:44:21,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:21,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:44:21,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:21,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:21,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:21,670 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:44:21,689 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:21,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:21,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:44:21,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148168854] [2020-10-15 16:44:21,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:44:21,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:21,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:44:21,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:44:21,690 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-10-15 16:44:22,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:22,773 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-10-15 16:44:22,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:44:22,773 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:44:22,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:22,774 INFO L225 Difference]: With dead ends: 90 [2020-10-15 16:44:22,774 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 16:44:22,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 16:44:22,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 16:44:22,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-15 16:44:22,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 16:44:22,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-10-15 16:44:22,777 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-10-15 16:44:22,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:22,777 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-10-15 16:44:22,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:44:22,777 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-10-15 16:44:22,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:22,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:22,777 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:22,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:22,978 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:22,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:22,979 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-10-15 16:44:22,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:22,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042801250] [2020-10-15 16:44:22,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:22,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:23,250 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:23,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042801250] [2020-10-15 16:44:23,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179014988] [2020-10-15 16:44:23,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:23,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 16:44:23,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:23,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:23,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:23,316 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:23,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:23,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 16:44:23,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019795710] [2020-10-15 16:44:23,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:23,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:23,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:23,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:23,317 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-10-15 16:44:23,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:23,771 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-10-15 16:44:23,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:44:23,771 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 16:44:23,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:23,771 INFO L225 Difference]: With dead ends: 96 [2020-10-15 16:44:23,772 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 16:44:23,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:44:23,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 16:44:23,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-10-15 16:44:23,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 16:44:23,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-10-15 16:44:23,774 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-10-15 16:44:23,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:23,774 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-10-15 16:44:23,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:23,774 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-10-15 16:44:23,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:23,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:23,775 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:23,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:23,983 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:23,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:23,983 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-10-15 16:44:23,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:23,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870020984] [2020-10-15 16:44:23,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:23,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:24,264 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:24,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870020984] [2020-10-15 16:44:24,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366483133] [2020-10-15 16:44:24,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:24,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:44:24,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:24,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:24,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:24,331 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:24,346 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:24,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:24,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:44:24,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350035298] [2020-10-15 16:44:24,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:44:24,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:24,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:44:24,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:44:24,348 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-10-15 16:44:24,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:24,821 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-10-15 16:44:24,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:44:24,821 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:44:24,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:24,822 INFO L225 Difference]: With dead ends: 114 [2020-10-15 16:44:24,822 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 16:44:24,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:44:24,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 16:44:24,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-10-15 16:44:24,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 16:44:24,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-10-15 16:44:24,824 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-10-15 16:44:24,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:24,825 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-10-15 16:44:24,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:44:24,825 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-10-15 16:44:24,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:24,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:24,825 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:25,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:25,026 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:25,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:25,026 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-10-15 16:44:25,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:25,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643507485] [2020-10-15 16:44:25,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:25,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:25,304 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:25,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643507485] [2020-10-15 16:44:25,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616592273] [2020-10-15 16:44:25,304 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:25,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 16:44:25,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:25,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:25,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:25,363 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:25,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:25,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 16:44:25,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996150960] [2020-10-15 16:44:25,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:25,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:25,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:25,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:25,364 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-10-15 16:44:25,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:25,891 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-10-15 16:44:25,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:44:25,891 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 16:44:25,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:25,892 INFO L225 Difference]: With dead ends: 115 [2020-10-15 16:44:25,892 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 16:44:25,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:44:25,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 16:44:25,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-10-15 16:44:25,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 16:44:25,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-10-15 16:44:25,895 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-10-15 16:44:25,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:25,895 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-10-15 16:44:25,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:25,895 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-10-15 16:44:25,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:25,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:25,895 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:26,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:26,096 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:26,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:26,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-10-15 16:44:26,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:26,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101858247] [2020-10-15 16:44:26,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:26,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:26,367 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:26,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101858247] [2020-10-15 16:44:26,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635509824] [2020-10-15 16:44:26,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:26,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 16:44:26,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:26,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:26,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:26,442 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:26,456 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:26,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:26,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:44:26,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391103600] [2020-10-15 16:44:26,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:44:26,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:26,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:44:26,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:44:26,457 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-10-15 16:44:27,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:27,022 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-10-15 16:44:27,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:44:27,022 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:44:27,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:27,023 INFO L225 Difference]: With dead ends: 129 [2020-10-15 16:44:27,023 INFO L226 Difference]: Without dead ends: 123 [2020-10-15 16:44:27,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 16:44:27,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-15 16:44:27,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-10-15 16:44:27,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 16:44:27,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-10-15 16:44:27,026 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-10-15 16:44:27,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:27,026 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-10-15 16:44:27,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:44:27,026 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-10-15 16:44:27,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:27,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:27,027 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:27,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:27,233 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:27,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:27,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-10-15 16:44:27,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:27,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475582156] [2020-10-15 16:44:27,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:27,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:27,486 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:27,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475582156] [2020-10-15 16:44:27,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522926688] [2020-10-15 16:44:27,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:27,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:27,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:27,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:27,545 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:27,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:27,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 16:44:27,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252324666] [2020-10-15 16:44:27,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:27,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:27,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:27,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:27,546 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-10-15 16:44:28,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:28,146 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-10-15 16:44:28,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:44:28,146 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 16:44:28,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:28,146 INFO L225 Difference]: With dead ends: 129 [2020-10-15 16:44:28,147 INFO L226 Difference]: Without dead ends: 123 [2020-10-15 16:44:28,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:44:28,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-15 16:44:28,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-10-15 16:44:28,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-15 16:44:28,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-10-15 16:44:28,149 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-10-15 16:44:28,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:28,149 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-10-15 16:44:28,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:28,149 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-10-15 16:44:28,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:28,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:28,150 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:28,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:28,350 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:28,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:28,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-10-15 16:44:28,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:28,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604791620] [2020-10-15 16:44:28,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:28,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:28,609 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:28,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604791620] [2020-10-15 16:44:28,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593270704] [2020-10-15 16:44:28,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:28,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:44:28,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:28,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:28,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:28,680 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:28,693 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:28,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:28,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:44:28,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420084412] [2020-10-15 16:44:28,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:44:28,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:28,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:44:28,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:44:28,694 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-10-15 16:44:29,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:29,366 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-10-15 16:44:29,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:44:29,366 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:44:29,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:29,367 INFO L225 Difference]: With dead ends: 126 [2020-10-15 16:44:29,367 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 16:44:29,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:44:29,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 16:44:29,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-10-15 16:44:29,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-15 16:44:29,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-10-15 16:44:29,369 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-10-15 16:44:29,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:29,370 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-10-15 16:44:29,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:44:29,370 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-10-15 16:44:29,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:29,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:29,370 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:29,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:29,578 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:29,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:29,578 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-10-15 16:44:29,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:29,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805838781] [2020-10-15 16:44:29,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:29,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:29,825 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:29,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805838781] [2020-10-15 16:44:29,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89634964] [2020-10-15 16:44:29,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:29,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 16:44:29,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:29,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:29,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:29,893 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:29,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:29,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 16:44:29,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792137388] [2020-10-15 16:44:29,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:29,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:29,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:29,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:29,894 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-10-15 16:44:30,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:30,544 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-10-15 16:44:30,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:44:30,544 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 16:44:30,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:30,545 INFO L225 Difference]: With dead ends: 127 [2020-10-15 16:44:30,545 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 16:44:30,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 16:44:30,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 16:44:30,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-10-15 16:44:30,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 16:44:30,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-10-15 16:44:30,548 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-10-15 16:44:30,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:30,548 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-10-15 16:44:30,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:30,548 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-10-15 16:44:30,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:30,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:30,549 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:30,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-15 16:44:30,754 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:30,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:30,754 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-10-15 16:44:30,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:30,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538476162] [2020-10-15 16:44:30,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:30,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:31,002 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:31,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538476162] [2020-10-15 16:44:31,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032500658] [2020-10-15 16:44:31,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:31,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:44:31,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:31,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:31,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:31,080 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:31,094 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:31,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:31,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:44:31,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902202108] [2020-10-15 16:44:31,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:44:31,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:31,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:44:31,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:44:31,095 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-10-15 16:44:31,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:31,849 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-10-15 16:44:31,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:44:31,849 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:44:31,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:31,850 INFO L225 Difference]: With dead ends: 124 [2020-10-15 16:44:31,850 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 16:44:31,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 16:44:31,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 16:44:31,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-10-15 16:44:31,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:44:31,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-10-15 16:44:31,851 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-10-15 16:44:31,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:31,851 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-10-15 16:44:31,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:44:31,852 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-10-15 16:44:31,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:31,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:31,852 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:32,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-15 16:44:32,053 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:32,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:32,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-10-15 16:44:32,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:32,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676086623] [2020-10-15 16:44:32,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:32,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:32,285 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:32,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676086623] [2020-10-15 16:44:32,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123273257] [2020-10-15 16:44:32,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:32,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 16:44:32,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:32,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:32,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:32,372 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:32,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:32,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 16:44:32,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418477169] [2020-10-15 16:44:32,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:32,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:32,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:32,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:32,374 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-10-15 16:44:33,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:33,087 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-10-15 16:44:33,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:44:33,087 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 16:44:33,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:33,088 INFO L225 Difference]: With dead ends: 125 [2020-10-15 16:44:33,088 INFO L226 Difference]: Without dead ends: 119 [2020-10-15 16:44:33,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 16:44:33,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-15 16:44:33,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-10-15 16:44:33,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 16:44:33,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-10-15 16:44:33,089 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-10-15 16:44:33,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:33,090 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-10-15 16:44:33,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:33,090 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-10-15 16:44:33,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:33,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:33,090 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:33,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-15 16:44:33,290 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:33,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:33,291 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-10-15 16:44:33,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:33,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023433480] [2020-10-15 16:44:33,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:33,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:33,522 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:33,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023433480] [2020-10-15 16:44:33,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035186202] [2020-10-15 16:44:33,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:33,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 16:44:33,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:33,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:33,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:33,597 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:33,613 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:33,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:33,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:44:33,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501060518] [2020-10-15 16:44:33,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:44:33,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:33,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:44:33,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:44:33,614 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-10-15 16:44:34,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:34,444 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-10-15 16:44:34,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:44:34,444 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:44:34,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:34,445 INFO L225 Difference]: With dead ends: 122 [2020-10-15 16:44:34,445 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 16:44:34,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 16:44:34,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 16:44:34,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-10-15 16:44:34,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 16:44:34,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-10-15 16:44:34,447 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-10-15 16:44:34,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:34,447 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-10-15 16:44:34,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:44:34,447 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-10-15 16:44:34,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:34,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:34,448 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:34,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-15 16:44:34,649 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:34,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:34,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-10-15 16:44:34,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:34,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005514224] [2020-10-15 16:44:34,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:34,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:34,870 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:34,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005514224] [2020-10-15 16:44:34,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987703629] [2020-10-15 16:44:34,871 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:34,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:34,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:34,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:34,932 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:34,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:34,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 16:44:34,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057974030] [2020-10-15 16:44:34,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:34,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:34,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:34,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:34,933 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-10-15 16:44:35,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:35,699 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-15 16:44:35,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 16:44:35,700 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 16:44:35,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:35,701 INFO L225 Difference]: With dead ends: 123 [2020-10-15 16:44:35,701 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 16:44:35,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 16:44:35,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 16:44:35,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-10-15 16:44:35,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 16:44:35,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-10-15 16:44:35,702 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-10-15 16:44:35,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:35,703 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-10-15 16:44:35,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:35,703 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-10-15 16:44:35,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:35,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:35,703 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:35,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:35,904 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:35,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:35,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-10-15 16:44:35,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:35,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492790515] [2020-10-15 16:44:35,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:35,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:36,128 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:36,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492790515] [2020-10-15 16:44:36,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625619278] [2020-10-15 16:44:36,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:36,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:44:36,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:36,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:36,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:36,198 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:36,212 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:36,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:36,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:44:36,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418307925] [2020-10-15 16:44:36,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:44:36,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:36,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:44:36,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:44:36,214 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-10-15 16:44:37,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:37,144 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-10-15 16:44:37,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:44:37,145 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:44:37,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:37,145 INFO L225 Difference]: With dead ends: 120 [2020-10-15 16:44:37,145 INFO L226 Difference]: Without dead ends: 114 [2020-10-15 16:44:37,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 16:44:37,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-15 16:44:37,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-10-15 16:44:37,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 16:44:37,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-10-15 16:44:37,147 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-10-15 16:44:37,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:37,147 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-10-15 16:44:37,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:44:37,147 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-10-15 16:44:37,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:37,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:37,147 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:37,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:37,348 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:37,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:37,349 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-10-15 16:44:37,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:37,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061438383] [2020-10-15 16:44:37,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:37,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:37,568 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:37,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061438383] [2020-10-15 16:44:37,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790150036] [2020-10-15 16:44:37,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:37,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 16:44:37,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:37,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:37,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:37,644 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:37,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:37,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 16:44:37,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706687235] [2020-10-15 16:44:37,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:37,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:37,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:37,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:37,645 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-10-15 16:44:38,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:38,471 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-15 16:44:38,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:44:38,472 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 16:44:38,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:38,472 INFO L225 Difference]: With dead ends: 121 [2020-10-15 16:44:38,472 INFO L226 Difference]: Without dead ends: 115 [2020-10-15 16:44:38,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 16:44:38,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-15 16:44:38,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-10-15 16:44:38,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:44:38,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 16:44:38,474 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-10-15 16:44:38,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:38,474 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 16:44:38,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:38,475 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 16:44:38,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:38,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:38,475 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:38,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-10-15 16:44:38,676 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:38,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:38,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-10-15 16:44:38,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:38,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156921741] [2020-10-15 16:44:38,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:38,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:38,896 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:38,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156921741] [2020-10-15 16:44:38,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675994017] [2020-10-15 16:44:38,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:38,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:44:38,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:38,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:38,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:38,977 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:38,997 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:38,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:38,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:44:38,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431542251] [2020-10-15 16:44:38,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:44:38,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:38,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:44:38,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:44:38,999 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-10-15 16:44:40,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:40,042 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-15 16:44:40,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:44:40,043 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:44:40,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:40,043 INFO L225 Difference]: With dead ends: 118 [2020-10-15 16:44:40,043 INFO L226 Difference]: Without dead ends: 112 [2020-10-15 16:44:40,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 16:44:40,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-15 16:44:40,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-10-15 16:44:40,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:44:40,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 16:44:40,046 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-10-15 16:44:40,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:40,046 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 16:44:40,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:44:40,046 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 16:44:40,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:40,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:40,047 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:40,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:40,247 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:40,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:40,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-10-15 16:44:40,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:40,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182832872] [2020-10-15 16:44:40,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:40,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:40,462 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:40,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182832872] [2020-10-15 16:44:40,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677159211] [2020-10-15 16:44:40,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:40,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 16:44:40,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:40,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:40,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:40,533 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:40,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:40,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 16:44:40,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446521441] [2020-10-15 16:44:40,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:40,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:40,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:40,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:40,535 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-10-15 16:44:41,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:41,422 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-10-15 16:44:41,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 16:44:41,422 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 16:44:41,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:41,423 INFO L225 Difference]: With dead ends: 119 [2020-10-15 16:44:41,423 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 16:44:41,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 16:44:41,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 16:44:41,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-10-15 16:44:41,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 16:44:41,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-10-15 16:44:41,426 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-10-15 16:44:41,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:41,426 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-10-15 16:44:41,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:41,427 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-10-15 16:44:41,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:41,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:41,427 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:41,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:41,635 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:41,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:41,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-10-15 16:44:41,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:41,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327809527] [2020-10-15 16:44:41,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:41,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:41,848 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:41,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327809527] [2020-10-15 16:44:41,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38634566] [2020-10-15 16:44:41,849 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:41,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 16:44:41,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:41,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:41,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:41,924 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:41,938 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:41,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:41,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:44:41,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060334150] [2020-10-15 16:44:41,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:44:41,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:41,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:44:41,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:44:41,940 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-10-15 16:44:43,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:43,057 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-10-15 16:44:43,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 16:44:43,058 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:44:43,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:43,058 INFO L225 Difference]: With dead ends: 116 [2020-10-15 16:44:43,058 INFO L226 Difference]: Without dead ends: 110 [2020-10-15 16:44:43,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 16:44:43,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-15 16:44:43,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-10-15 16:44:43,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 16:44:43,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-15 16:44:43,061 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-10-15 16:44:43,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:43,062 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-15 16:44:43,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:44:43,062 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-15 16:44:43,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:43,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:43,062 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:43,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:43,268 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:43,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:43,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-10-15 16:44:43,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:43,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541008251] [2020-10-15 16:44:43,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:43,482 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:43,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541008251] [2020-10-15 16:44:43,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953557904] [2020-10-15 16:44:43,483 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:43,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:43,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:43,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:43,553 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:43,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:43,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 16:44:43,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636734243] [2020-10-15 16:44:43,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:43,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:43,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:43,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:43,554 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-10-15 16:44:44,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:44,477 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-10-15 16:44:44,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 16:44:44,478 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 16:44:44,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:44,479 INFO L225 Difference]: With dead ends: 136 [2020-10-15 16:44:44,479 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 16:44:44,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 16:44:44,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 16:44:44,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-10-15 16:44:44,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 16:44:44,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-10-15 16:44:44,483 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-10-15 16:44:44,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:44,483 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-10-15 16:44:44,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:44,483 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-10-15 16:44:44,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:44,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:44,484 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:44,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:44,691 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:44,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:44,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-10-15 16:44:44,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:44,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030932151] [2020-10-15 16:44:44,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:44,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:44,913 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:44,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030932151] [2020-10-15 16:44:44,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666883234] [2020-10-15 16:44:44,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:44,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:44:44,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:44,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:44,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:44,986 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:45,000 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:45,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:45,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:44:45,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801139705] [2020-10-15 16:44:45,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:44:45,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:45,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:44:45,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:44:45,002 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-10-15 16:44:46,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:46,143 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-10-15 16:44:46,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 16:44:46,144 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:44:46,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:46,144 INFO L225 Difference]: With dead ends: 117 [2020-10-15 16:44:46,144 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 16:44:46,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 16:44:46,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 16:44:46,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-10-15 16:44:46,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-15 16:44:46,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-10-15 16:44:46,147 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-10-15 16:44:46,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:46,147 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-10-15 16:44:46,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:44:46,148 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-10-15 16:44:46,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:44:46,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:46,148 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:46,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:46,349 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:46,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:46,349 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-10-15 16:44:46,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:46,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483715445] [2020-10-15 16:44:46,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:46,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:46,659 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:46,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483715445] [2020-10-15 16:44:46,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524911333] [2020-10-15 16:44:46,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:46,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 16:44:46,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:46,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:44:46,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:46,720 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:46,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:46,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 16:44:46,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046699672] [2020-10-15 16:44:46,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:44:46,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:46,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:44:46,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:44:46,725 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-10-15 16:44:47,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:47,247 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-10-15 16:44:47,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:44:47,248 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 16:44:47,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:47,249 INFO L225 Difference]: With dead ends: 134 [2020-10-15 16:44:47,249 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 16:44:47,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:44:47,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 16:44:47,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-10-15 16:44:47,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:44:47,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 16:44:47,251 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 16:44:47,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:47,251 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 16:44:47,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:44:47,251 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 16:44:47,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:44:47,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:47,252 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:47,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-10-15 16:44:47,453 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:47,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:47,453 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-10-15 16:44:47,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:47,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467787350] [2020-10-15 16:44:47,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:47,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:47,763 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:47,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467787350] [2020-10-15 16:44:47,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813522997] [2020-10-15 16:44:47,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:47,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:44:47,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:47,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:44:47,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:47,838 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:47,849 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:47,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:47,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:44:47,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356383267] [2020-10-15 16:44:47,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:44:47,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:47,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:44:47,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:44:47,850 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 16:44:48,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:48,463 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-10-15 16:44:48,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:44:48,464 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:44:48,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:48,464 INFO L225 Difference]: With dead ends: 131 [2020-10-15 16:44:48,465 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 16:44:48,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:44:48,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 16:44:48,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-10-15 16:44:48,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:44:48,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 16:44:48,467 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 16:44:48,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:48,467 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 16:44:48,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:44:48,468 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 16:44:48,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:44:48,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:48,468 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:48,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-15 16:44:48,669 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:48,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:48,669 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-10-15 16:44:48,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:48,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501516069] [2020-10-15 16:44:48,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:48,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:48,969 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:48,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501516069] [2020-10-15 16:44:48,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350707341] [2020-10-15 16:44:48,970 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:49,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 16:44:49,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:49,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:44:49,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:49,038 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:49,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:49,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 16:44:49,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118687512] [2020-10-15 16:44:49,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:44:49,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:49,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:44:49,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:44:49,040 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 16:44:49,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:49,630 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-10-15 16:44:49,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:44:49,631 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 16:44:49,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:49,632 INFO L225 Difference]: With dead ends: 128 [2020-10-15 16:44:49,632 INFO L226 Difference]: Without dead ends: 122 [2020-10-15 16:44:49,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 16:44:49,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-15 16:44:49,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-10-15 16:44:49,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:44:49,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 16:44:49,634 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 16:44:49,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:49,635 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 16:44:49,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:44:49,635 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 16:44:49,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:44:49,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:49,635 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:49,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:49,836 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:49,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:49,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-10-15 16:44:49,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:49,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877458970] [2020-10-15 16:44:49,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:49,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:50,131 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:50,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877458970] [2020-10-15 16:44:50,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366626327] [2020-10-15 16:44:50,132 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:50,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 16:44:50,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:50,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:44:50,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:50,211 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:50,223 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:50,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:50,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:44:50,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437007536] [2020-10-15 16:44:50,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:44:50,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:50,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:44:50,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:44:50,224 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 16:44:50,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:50,944 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-10-15 16:44:50,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:44:50,945 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:44:50,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:50,945 INFO L225 Difference]: With dead ends: 127 [2020-10-15 16:44:50,946 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 16:44:50,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 16:44:50,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 16:44:50,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-10-15 16:44:50,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:44:50,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 16:44:50,948 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 16:44:50,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:50,948 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 16:44:50,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:44:50,948 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 16:44:50,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:44:50,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:50,949 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:51,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-10-15 16:44:51,149 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:51,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:51,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-10-15 16:44:51,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:51,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474399299] [2020-10-15 16:44:51,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:51,426 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:51,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474399299] [2020-10-15 16:44:51,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102693449] [2020-10-15 16:44:51,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:51,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:51,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:44:51,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:51,489 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:51,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:51,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 16:44:51,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923406758] [2020-10-15 16:44:51,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:44:51,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:51,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:44:51,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:44:51,491 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 16:44:52,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:52,147 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-10-15 16:44:52,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:44:52,148 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 16:44:52,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:52,148 INFO L225 Difference]: With dead ends: 124 [2020-10-15 16:44:52,149 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 16:44:52,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:44:52,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 16:44:52,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-10-15 16:44:52,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:44:52,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 16:44:52,151 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 16:44:52,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:52,151 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 16:44:52,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:44:52,151 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 16:44:52,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:44:52,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:52,152 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:52,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:52,352 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:52,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:52,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-10-15 16:44:52,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:52,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753988090] [2020-10-15 16:44:52,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:52,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:52,641 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:52,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753988090] [2020-10-15 16:44:52,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698734078] [2020-10-15 16:44:52,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:52,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:44:52,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:52,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:44:52,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:52,710 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:52,722 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:52,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:52,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:44:52,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470851444] [2020-10-15 16:44:52,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:44:52,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:52,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:44:52,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:44:52,724 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 16:44:53,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:53,497 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-10-15 16:44:53,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:44:53,498 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:44:53,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:53,498 INFO L225 Difference]: With dead ends: 123 [2020-10-15 16:44:53,498 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 16:44:53,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 16:44:53,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 16:44:53,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-10-15 16:44:53,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:44:53,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 16:44:53,501 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 16:44:53,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:53,501 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 16:44:53,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:44:53,501 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 16:44:53,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:44:53,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:53,502 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:53,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:53,702 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:53,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:53,703 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-10-15 16:44:53,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:53,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063476970] [2020-10-15 16:44:53,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:53,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:53,970 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:53,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063476970] [2020-10-15 16:44:53,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227762178] [2020-10-15 16:44:53,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:54,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 16:44:54,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:54,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:44:54,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:54,036 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:54,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:54,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 16:44:54,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787884975] [2020-10-15 16:44:54,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:44:54,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:54,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:44:54,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:44:54,037 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 16:44:54,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:54,764 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-15 16:44:54,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:44:54,765 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 16:44:54,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:54,765 INFO L225 Difference]: With dead ends: 120 [2020-10-15 16:44:54,766 INFO L226 Difference]: Without dead ends: 114 [2020-10-15 16:44:54,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 16:44:54,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-15 16:44:54,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-10-15 16:44:54,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:44:54,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 16:44:54,768 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 16:44:54,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:54,768 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 16:44:54,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:44:54,768 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 16:44:54,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:44:54,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:54,769 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:54,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:54,969 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:54,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:54,970 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-10-15 16:44:54,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:54,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102859688] [2020-10-15 16:44:54,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:54,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:55,243 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:55,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102859688] [2020-10-15 16:44:55,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774259650] [2020-10-15 16:44:55,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:55,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:44:55,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:55,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:44:55,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:55,311 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:55,324 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:55,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:55,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:44:55,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853128452] [2020-10-15 16:44:55,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:44:55,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:55,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:44:55,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:44:55,325 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 16:44:56,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:56,229 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-10-15 16:44:56,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:44:56,230 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:44:56,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:56,231 INFO L225 Difference]: With dead ends: 119 [2020-10-15 16:44:56,231 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 16:44:56,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 16:44:56,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 16:44:56,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-10-15 16:44:56,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:44:56,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 16:44:56,234 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 16:44:56,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:56,234 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 16:44:56,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:44:56,235 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 16:44:56,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:44:56,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:56,235 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:56,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:56,443 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:56,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:56,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-10-15 16:44:56,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:56,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920137560] [2020-10-15 16:44:56,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:56,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:56,699 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:56,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920137560] [2020-10-15 16:44:56,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184761015] [2020-10-15 16:44:56,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:56,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 16:44:56,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:56,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:44:56,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:56,770 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:56,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:56,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 16:44:56,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650261940] [2020-10-15 16:44:56,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:44:56,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:56,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:44:56,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:44:56,772 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 16:44:57,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:57,562 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-10-15 16:44:57,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:44:57,563 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 16:44:57,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:57,564 INFO L225 Difference]: With dead ends: 116 [2020-10-15 16:44:57,564 INFO L226 Difference]: Without dead ends: 110 [2020-10-15 16:44:57,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 16:44:57,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-15 16:44:57,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-10-15 16:44:57,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:44:57,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 16:44:57,566 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 16:44:57,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:57,566 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 16:44:57,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:44:57,567 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 16:44:57,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:44:57,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:57,567 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:57,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-10-15 16:44:57,768 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:57,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:57,768 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-10-15 16:44:57,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:57,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586223800] [2020-10-15 16:44:57,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:57,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:58,027 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:58,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586223800] [2020-10-15 16:44:58,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955292759] [2020-10-15 16:44:58,028 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:58,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 16:44:58,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:58,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:44:58,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:58,103 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:58,118 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:58,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:58,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:44:58,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725008887] [2020-10-15 16:44:58,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:44:58,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:58,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:44:58,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:44:58,119 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 16:44:59,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:59,121 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-10-15 16:44:59,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:44:59,122 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:44:59,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:59,123 INFO L225 Difference]: With dead ends: 115 [2020-10-15 16:44:59,123 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 16:44:59,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 16:44:59,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 16:44:59,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-10-15 16:44:59,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:44:59,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 16:44:59,126 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 16:44:59,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:59,127 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 16:44:59,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:44:59,127 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 16:44:59,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:44:59,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:59,127 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:59,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:59,335 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:59,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:59,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-10-15 16:44:59,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:59,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335000823] [2020-10-15 16:44:59,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:59,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:59,586 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:59,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335000823] [2020-10-15 16:44:59,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973017197] [2020-10-15 16:44:59,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:59,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:59,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:44:59,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:59,649 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:59,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:59,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 16:44:59,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174446729] [2020-10-15 16:44:59,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:44:59,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:59,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:44:59,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:44:59,650 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 16:45:00,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:00,530 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-10-15 16:45:00,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 16:45:00,531 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 16:45:00,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:00,531 INFO L225 Difference]: With dead ends: 112 [2020-10-15 16:45:00,531 INFO L226 Difference]: Without dead ends: 106 [2020-10-15 16:45:00,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 16:45:00,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-15 16:45:00,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-10-15 16:45:00,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:45:00,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 16:45:00,534 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 16:45:00,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:00,534 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 16:45:00,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:00,534 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 16:45:00,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:00,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:00,534 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:00,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-10-15 16:45:00,735 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:00,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:00,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-10-15 16:45:00,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:00,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545747349] [2020-10-15 16:45:00,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:00,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:00,992 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:00,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545747349] [2020-10-15 16:45:00,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238775921] [2020-10-15 16:45:00,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:01,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:45:01,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:01,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:01,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:01,062 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:01,079 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:01,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:01,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:45:01,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403396666] [2020-10-15 16:45:01,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:01,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:01,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:01,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:01,080 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 16:45:02,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:02,176 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-10-15 16:45:02,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:45:02,177 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:45:02,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:02,178 INFO L225 Difference]: With dead ends: 111 [2020-10-15 16:45:02,178 INFO L226 Difference]: Without dead ends: 105 [2020-10-15 16:45:02,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 16:45:02,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-15 16:45:02,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-10-15 16:45:02,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:45:02,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 16:45:02,180 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 16:45:02,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:02,181 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 16:45:02,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:02,181 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 16:45:02,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:02,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:02,181 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:02,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-15 16:45:02,382 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:02,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:02,383 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-10-15 16:45:02,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:02,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962683585] [2020-10-15 16:45:02,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:02,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:02,626 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:02,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962683585] [2020-10-15 16:45:02,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612633088] [2020-10-15 16:45:02,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:02,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 16:45:02,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:02,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:02,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:02,701 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:02,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:02,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 16:45:02,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5436317] [2020-10-15 16:45:02,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:02,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:02,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:02,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:02,702 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 16:45:03,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:03,633 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-15 16:45:03,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:45:03,633 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 16:45:03,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:03,634 INFO L225 Difference]: With dead ends: 108 [2020-10-15 16:45:03,634 INFO L226 Difference]: Without dead ends: 102 [2020-10-15 16:45:03,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 16:45:03,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-15 16:45:03,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-10-15 16:45:03,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:45:03,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 16:45:03,636 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 16:45:03,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:03,636 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 16:45:03,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:03,636 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 16:45:03,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:03,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:03,637 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:03,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:03,840 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:03,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:03,840 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-10-15 16:45:03,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:03,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198633178] [2020-10-15 16:45:03,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:03,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:04,090 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:04,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198633178] [2020-10-15 16:45:04,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119481466] [2020-10-15 16:45:04,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:04,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:45:04,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:04,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:04,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:04,161 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:04,177 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:04,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:04,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:45:04,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051939680] [2020-10-15 16:45:04,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:04,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:04,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:04,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:04,178 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 16:45:05,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:05,373 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-15 16:45:05,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 16:45:05,374 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:45:05,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:05,374 INFO L225 Difference]: With dead ends: 107 [2020-10-15 16:45:05,374 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 16:45:05,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 16:45:05,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 16:45:05,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-10-15 16:45:05,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:45:05,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 16:45:05,377 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 16:45:05,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:05,377 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 16:45:05,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:05,377 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 16:45:05,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:05,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:05,377 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:05,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:05,584 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:05,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:05,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-10-15 16:45:05,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:05,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354246204] [2020-10-15 16:45:05,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:05,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:05,826 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:05,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354246204] [2020-10-15 16:45:05,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612504906] [2020-10-15 16:45:05,827 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:05,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 16:45:05,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:05,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:05,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:05,900 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:05,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:05,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 16:45:05,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70083644] [2020-10-15 16:45:05,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:05,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:05,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:05,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:05,901 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 16:45:06,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:06,906 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-10-15 16:45:06,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 16:45:06,907 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 16:45:06,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:06,907 INFO L225 Difference]: With dead ends: 104 [2020-10-15 16:45:06,907 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 16:45:06,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 16:45:06,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 16:45:06,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-10-15 16:45:06,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:45:06,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 16:45:06,910 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 16:45:06,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:06,910 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 16:45:06,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:06,911 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 16:45:06,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:06,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:06,911 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:07,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:07,112 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:07,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:07,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-10-15 16:45:07,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:07,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896795322] [2020-10-15 16:45:07,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:07,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:07,353 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:07,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896795322] [2020-10-15 16:45:07,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385496592] [2020-10-15 16:45:07,353 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:07,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 16:45:07,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:07,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:07,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:07,436 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:07,453 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:07,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:07,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:45:07,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530661590] [2020-10-15 16:45:07,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:07,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:07,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:07,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:07,454 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 16:45:08,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:08,764 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-10-15 16:45:08,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 16:45:08,765 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:45:08,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:08,765 INFO L225 Difference]: With dead ends: 103 [2020-10-15 16:45:08,765 INFO L226 Difference]: Without dead ends: 97 [2020-10-15 16:45:08,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 16:45:08,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-15 16:45:08,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-10-15 16:45:08,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:45:08,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 16:45:08,768 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 16:45:08,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:08,769 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 16:45:08,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:08,769 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 16:45:08,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:08,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:08,769 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:08,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-10-15 16:45:08,978 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:08,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:08,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-10-15 16:45:08,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:08,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306265613] [2020-10-15 16:45:08,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:08,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:09,222 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:09,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306265613] [2020-10-15 16:45:09,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352583753] [2020-10-15 16:45:09,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:09,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:09,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:09,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:09,300 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:09,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:09,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 16:45:09,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168560414] [2020-10-15 16:45:09,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:09,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:09,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:09,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:09,302 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 16:45:10,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:10,359 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-10-15 16:45:10,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 16:45:10,360 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 16:45:10,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:10,360 INFO L225 Difference]: With dead ends: 119 [2020-10-15 16:45:10,361 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 16:45:10,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 16:45:10,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 16:45:10,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-10-15 16:45:10,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-15 16:45:10,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-10-15 16:45:10,363 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-10-15 16:45:10,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:10,364 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-10-15 16:45:10,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:10,364 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-10-15 16:45:10,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:10,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:10,364 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:10,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:10,565 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:10,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:10,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-10-15 16:45:10,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:10,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838725234] [2020-10-15 16:45:10,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:10,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:10,812 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:10,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838725234] [2020-10-15 16:45:10,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950217663] [2020-10-15 16:45:10,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:10,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:45:10,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:10,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:10,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:10,885 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:10,903 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:10,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:10,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:45:10,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415479830] [2020-10-15 16:45:10,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:10,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:10,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:10,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:10,904 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-10-15 16:45:12,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:12,236 INFO L93 Difference]: Finished difference Result 100 states and 249 transitions. [2020-10-15 16:45:12,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 16:45:12,236 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:45:12,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:12,237 INFO L225 Difference]: With dead ends: 100 [2020-10-15 16:45:12,237 INFO L226 Difference]: Without dead ends: 92 [2020-10-15 16:45:12,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 16:45:12,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-15 16:45:12,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-10-15 16:45:12,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-15 16:45:12,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-10-15 16:45:12,238 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-10-15 16:45:12,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:12,239 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-10-15 16:45:12,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:12,239 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-10-15 16:45:12,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:12,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:12,239 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:12,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:12,440 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:12,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:12,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-10-15 16:45:12,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:12,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441295375] [2020-10-15 16:45:12,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:12,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:12,685 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:12,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441295375] [2020-10-15 16:45:12,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029228799] [2020-10-15 16:45:12,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:12,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 16:45:12,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:12,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:12,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:12,769 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:45:12,793 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:12,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:12,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:45:12,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553439658] [2020-10-15 16:45:12,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:12,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:12,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:12,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:12,794 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-10-15 16:45:14,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:14,048 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-10-15 16:45:14,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 16:45:14,049 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:45:14,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:14,049 INFO L225 Difference]: With dead ends: 116 [2020-10-15 16:45:14,049 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 16:45:14,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 16:45:14,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 16:45:14,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-10-15 16:45:14,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 16:45:14,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-15 16:45:14,051 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-10-15 16:45:14,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:14,051 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-15 16:45:14,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:14,052 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-15 16:45:14,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:14,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:14,052 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:14,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:14,253 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:14,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:14,253 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-10-15 16:45:14,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:14,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158941347] [2020-10-15 16:45:14,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:14,524 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:14,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158941347] [2020-10-15 16:45:14,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360177675] [2020-10-15 16:45:14,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:14,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:45:14,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:14,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:14,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:14,607 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:45:14,631 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:14,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:14,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:45:14,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730434500] [2020-10-15 16:45:14,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:45:14,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:14,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:45:14,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:45:14,633 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-10-15 16:45:15,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:15,975 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-10-15 16:45:15,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 16:45:15,976 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:45:15,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:15,976 INFO L225 Difference]: With dead ends: 96 [2020-10-15 16:45:15,977 INFO L226 Difference]: Without dead ends: 91 [2020-10-15 16:45:15,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 16:45:15,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-15 16:45:15,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-10-15 16:45:15,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 16:45:15,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-10-15 16:45:15,979 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-10-15 16:45:15,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:15,979 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-10-15 16:45:15,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:45:15,979 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-10-15 16:45:15,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:15,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:15,980 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:16,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:16,181 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:16,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:16,181 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-10-15 16:45:16,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:16,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051429261] [2020-10-15 16:45:16,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:16,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:16,526 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:16,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051429261] [2020-10-15 16:45:16,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446254727] [2020-10-15 16:45:16,527 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:16,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 16:45:16,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:16,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:16,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:16,592 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:16,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:16,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:45:16,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232040172] [2020-10-15 16:45:16,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:16,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:16,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:16,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:16,594 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-10-15 16:45:17,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:17,129 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-10-15 16:45:17,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:45:17,130 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:45:17,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:17,131 INFO L225 Difference]: With dead ends: 102 [2020-10-15 16:45:17,131 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 16:45:17,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 16:45:17,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 16:45:17,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-10-15 16:45:17,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:45:17,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-10-15 16:45:17,133 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-10-15 16:45:17,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:17,133 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-10-15 16:45:17,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:17,133 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-10-15 16:45:17,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:17,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:17,133 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:17,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-10-15 16:45:17,334 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:17,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:17,335 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-10-15 16:45:17,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:17,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702615059] [2020-10-15 16:45:17,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:17,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:17,687 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:17,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702615059] [2020-10-15 16:45:17,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717769885] [2020-10-15 16:45:17,687 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:17,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 16:45:17,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:17,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:17,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:17,765 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:17,776 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:17,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:17,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:45:17,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327226273] [2020-10-15 16:45:17,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:45:17,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:17,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:45:17,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:45:17,777 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-10-15 16:45:18,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:18,388 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-10-15 16:45:18,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:45:18,388 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:45:18,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:18,389 INFO L225 Difference]: With dead ends: 122 [2020-10-15 16:45:18,389 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 16:45:18,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:45:18,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 16:45:18,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-10-15 16:45:18,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-15 16:45:18,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-10-15 16:45:18,391 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-10-15 16:45:18,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:18,391 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-10-15 16:45:18,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:45:18,391 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-10-15 16:45:18,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:18,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:18,392 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:18,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-10-15 16:45:18,592 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:18,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:18,593 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-10-15 16:45:18,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:18,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714769458] [2020-10-15 16:45:18,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:18,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:18,937 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:18,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714769458] [2020-10-15 16:45:18,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724747605] [2020-10-15 16:45:18,938 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:18,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:18,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:18,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:19,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:19,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:45:19,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23299487] [2020-10-15 16:45:19,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:19,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:19,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:19,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:19,004 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-10-15 16:45:19,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:19,648 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-10-15 16:45:19,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:45:19,649 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:45:19,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:19,650 INFO L225 Difference]: With dead ends: 123 [2020-10-15 16:45:19,650 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 16:45:19,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:45:19,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 16:45:19,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-10-15 16:45:19,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 16:45:19,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-10-15 16:45:19,653 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-10-15 16:45:19,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:19,653 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-10-15 16:45:19,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:19,653 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-10-15 16:45:19,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:19,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:19,654 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:19,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-10-15 16:45:19,856 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:19,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:19,856 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-10-15 16:45:19,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:19,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687621143] [2020-10-15 16:45:19,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:19,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:20,207 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:20,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687621143] [2020-10-15 16:45:20,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783512550] [2020-10-15 16:45:20,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:20,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:45:20,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:20,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:20,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:20,278 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:20,291 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:20,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:20,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:45:20,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103475823] [2020-10-15 16:45:20,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:45:20,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:20,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:45:20,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:45:20,293 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-10-15 16:45:20,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:20,986 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-10-15 16:45:20,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:45:20,987 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:45:20,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:20,987 INFO L225 Difference]: With dead ends: 139 [2020-10-15 16:45:20,987 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 16:45:20,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 16:45:20,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 16:45:20,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-10-15 16:45:20,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:45:20,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-10-15 16:45:20,990 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-10-15 16:45:20,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:20,990 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-10-15 16:45:20,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:45:20,990 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-10-15 16:45:20,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:20,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:20,991 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:21,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-10-15 16:45:21,198 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:21,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:21,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-10-15 16:45:21,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:21,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429339947] [2020-10-15 16:45:21,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:21,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:21,518 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:21,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429339947] [2020-10-15 16:45:21,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626069049] [2020-10-15 16:45:21,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:21,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 16:45:21,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:21,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:21,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:21,586 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:21,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:21,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:45:21,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808357091] [2020-10-15 16:45:21,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:21,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:21,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:21,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:21,588 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-10-15 16:45:22,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:22,318 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-10-15 16:45:22,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:45:22,319 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:45:22,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:22,319 INFO L225 Difference]: With dead ends: 139 [2020-10-15 16:45:22,319 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 16:45:22,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=618, Invalid=1638, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 16:45:22,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 16:45:22,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-10-15 16:45:22,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 16:45:22,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-10-15 16:45:22,322 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-10-15 16:45:22,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:22,322 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-10-15 16:45:22,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:22,322 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-10-15 16:45:22,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:22,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:22,322 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:22,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:22,523 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:22,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:22,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-10-15 16:45:22,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:22,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579671074] [2020-10-15 16:45:22,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:22,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:22,854 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:22,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579671074] [2020-10-15 16:45:22,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941370228] [2020-10-15 16:45:22,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:22,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:45:22,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:22,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:22,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:22,928 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:22,941 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:22,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:22,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:45:22,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27319628] [2020-10-15 16:45:22,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:45:22,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:22,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:45:22,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:45:22,942 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-10-15 16:45:23,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:23,749 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-10-15 16:45:23,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:45:23,749 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:45:23,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:23,750 INFO L225 Difference]: With dead ends: 136 [2020-10-15 16:45:23,750 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 16:45:23,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 16:45:23,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 16:45:23,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-10-15 16:45:23,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 16:45:23,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-10-15 16:45:23,752 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-10-15 16:45:23,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:23,752 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-10-15 16:45:23,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:45:23,752 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-10-15 16:45:23,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:23,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:23,753 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:23,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-10-15 16:45:23,953 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:23,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:23,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-10-15 16:45:23,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:23,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198162865] [2020-10-15 16:45:23,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:23,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:24,264 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:24,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198162865] [2020-10-15 16:45:24,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474471127] [2020-10-15 16:45:24,265 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:24,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 16:45:24,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:24,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:24,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:24,332 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:24,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:24,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:45:24,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999106085] [2020-10-15 16:45:24,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:24,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:24,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:24,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:24,333 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-10-15 16:45:25,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:25,120 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-10-15 16:45:25,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:45:25,120 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:45:25,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:25,121 INFO L225 Difference]: With dead ends: 137 [2020-10-15 16:45:25,121 INFO L226 Difference]: Without dead ends: 131 [2020-10-15 16:45:25,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 16:45:25,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-15 16:45:25,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-10-15 16:45:25,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 16:45:25,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-10-15 16:45:25,123 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-10-15 16:45:25,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:25,124 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-10-15 16:45:25,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:25,124 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-10-15 16:45:25,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:25,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:25,124 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:25,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:25,325 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:25,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:25,326 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-10-15 16:45:25,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:25,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995376988] [2020-10-15 16:45:25,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:25,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:25,643 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:25,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995376988] [2020-10-15 16:45:25,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696599727] [2020-10-15 16:45:25,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:25,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 16:45:25,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:25,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:25,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:25,721 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:25,736 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:25,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:25,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:45:25,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850885357] [2020-10-15 16:45:25,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:45:25,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:25,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:45:25,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:45:25,737 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states. [2020-10-15 16:45:26,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:26,659 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2020-10-15 16:45:26,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:45:26,660 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:45:26,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:26,661 INFO L225 Difference]: With dead ends: 134 [2020-10-15 16:45:26,661 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 16:45:26,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 16:45:26,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 16:45:26,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-10-15 16:45:26,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 16:45:26,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions. [2020-10-15 16:45:26,663 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27 [2020-10-15 16:45:26,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:26,663 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 195 transitions. [2020-10-15 16:45:26,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:45:26,663 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions. [2020-10-15 16:45:26,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:26,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:26,663 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:26,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-10-15 16:45:26,864 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:26,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:26,865 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times [2020-10-15 16:45:26,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:26,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105487419] [2020-10-15 16:45:26,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:27,164 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:27,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105487419] [2020-10-15 16:45:27,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719625540] [2020-10-15 16:45:27,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:27,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:27,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:27,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:27,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:45:27,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965282205] [2020-10-15 16:45:27,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:27,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:27,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:27,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:27,235 INFO L87 Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states. [2020-10-15 16:45:28,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:28,090 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-10-15 16:45:28,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 16:45:28,091 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:45:28,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:28,091 INFO L225 Difference]: With dead ends: 135 [2020-10-15 16:45:28,091 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 16:45:28,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=706, Invalid=1946, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 16:45:28,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 16:45:28,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-10-15 16:45:28,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:45:28,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-10-15 16:45:28,094 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27 [2020-10-15 16:45:28,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:28,094 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-10-15 16:45:28,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:28,094 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-10-15 16:45:28,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:28,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:28,095 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:28,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:28,295 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:28,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:28,296 INFO L82 PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times [2020-10-15 16:45:28,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:28,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551445395] [2020-10-15 16:45:28,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:28,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:28,596 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:28,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551445395] [2020-10-15 16:45:28,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810146831] [2020-10-15 16:45:28,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:28,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:45:28,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:28,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:28,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:28,669 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:28,684 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:28,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:28,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:45:28,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288477430] [2020-10-15 16:45:28,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:45:28,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:28,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:45:28,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:45:28,685 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states. [2020-10-15 16:45:29,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:29,682 INFO L93 Difference]: Finished difference Result 132 states and 305 transitions. [2020-10-15 16:45:29,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:45:29,683 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:45:29,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:29,683 INFO L225 Difference]: With dead ends: 132 [2020-10-15 16:45:29,683 INFO L226 Difference]: Without dead ends: 126 [2020-10-15 16:45:29,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=712, Invalid=2044, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 16:45:29,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-15 16:45:29,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2020-10-15 16:45:29,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:45:29,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 201 transitions. [2020-10-15 16:45:29,685 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 201 transitions. Word has length 27 [2020-10-15 16:45:29,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:29,685 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 201 transitions. [2020-10-15 16:45:29,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:45:29,686 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 201 transitions. [2020-10-15 16:45:29,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:29,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:29,686 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:29,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:29,887 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:29,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:29,888 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 207 times [2020-10-15 16:45:29,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:29,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377951739] [2020-10-15 16:45:29,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:29,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:30,171 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:30,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377951739] [2020-10-15 16:45:30,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117913431] [2020-10-15 16:45:30,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:30,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 16:45:30,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:30,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:30,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:30,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:30,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:45:30,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983602176] [2020-10-15 16:45:30,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:30,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:30,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:30,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:30,247 INFO L87 Difference]: Start difference. First operand 80 states and 201 transitions. Second operand 23 states. [2020-10-15 16:45:31,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:31,158 INFO L93 Difference]: Finished difference Result 133 states and 309 transitions. [2020-10-15 16:45:31,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:45:31,159 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:45:31,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:31,159 INFO L225 Difference]: With dead ends: 133 [2020-10-15 16:45:31,159 INFO L226 Difference]: Without dead ends: 127 [2020-10-15 16:45:31,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=774, Invalid=2088, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 16:45:31,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-15 16:45:31,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-10-15 16:45:31,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 16:45:31,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-10-15 16:45:31,162 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 27 [2020-10-15 16:45:31,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:31,162 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-10-15 16:45:31,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:31,162 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-10-15 16:45:31,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:31,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:31,162 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:31,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:31,363 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:31,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:31,363 INFO L82 PathProgramCache]: Analyzing trace with hash 496892893, now seen corresponding path program 208 times [2020-10-15 16:45:31,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:31,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415446362] [2020-10-15 16:45:31,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:31,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:31,663 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:31,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415446362] [2020-10-15 16:45:31,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20098591] [2020-10-15 16:45:31,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:31,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:45:31,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:31,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:31,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:31,756 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:31,772 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:31,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:31,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:45:31,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940035532] [2020-10-15 16:45:31,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:45:31,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:31,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:45:31,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:45:31,773 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 24 states. [2020-10-15 16:45:32,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:32,865 INFO L93 Difference]: Finished difference Result 130 states and 303 transitions. [2020-10-15 16:45:32,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:45:32,866 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:45:32,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:32,866 INFO L225 Difference]: With dead ends: 130 [2020-10-15 16:45:32,866 INFO L226 Difference]: Without dead ends: 124 [2020-10-15 16:45:32,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 16:45:32,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-15 16:45:32,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2020-10-15 16:45:32,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 16:45:32,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-10-15 16:45:32,868 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 27 [2020-10-15 16:45:32,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:32,868 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-10-15 16:45:32,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:45:32,868 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-10-15 16:45:32,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:32,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:32,869 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:33,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:33,070 INFO L429 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:33,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:33,070 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 209 times [2020-10-15 16:45:33,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:33,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535860932] [2020-10-15 16:45:33,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:33,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:33,353 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:33,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535860932] [2020-10-15 16:45:33,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487447069] [2020-10-15 16:45:33,354 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:33,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 16:45:33,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:33,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:33,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:33,435 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:33,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:33,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:45:33,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074437501] [2020-10-15 16:45:33,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:33,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:33,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:33,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:33,436 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 23 states. [2020-10-15 16:45:34,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:34,422 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-10-15 16:45:34,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 16:45:34,423 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:45:34,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:34,423 INFO L225 Difference]: With dead ends: 131 [2020-10-15 16:45:34,423 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 16:45:34,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=858, Invalid=2222, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 16:45:34,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 16:45:34,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-10-15 16:45:34,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-15 16:45:34,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-10-15 16:45:34,425 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 27 [2020-10-15 16:45:34,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:34,425 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-10-15 16:45:34,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:34,426 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-10-15 16:45:34,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:34,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:34,426 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:34,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-10-15 16:45:34,627 INFO L429 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:34,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:34,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 210 times [2020-10-15 16:45:34,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:34,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771797740] [2020-10-15 16:45:34,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:34,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:34,910 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:34,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771797740] [2020-10-15 16:45:34,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157823436] [2020-10-15 16:45:34,910 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:34,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 16:45:34,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:34,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:34,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:34,990 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:35,006 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:35,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:35,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:45:35,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134039370] [2020-10-15 16:45:35,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:45:35,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:35,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:45:35,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:45:35,007 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 24 states. [2020-10-15 16:45:36,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:36,192 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-10-15 16:45:36,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 16:45:36,193 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:45:36,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:36,194 INFO L225 Difference]: With dead ends: 128 [2020-10-15 16:45:36,194 INFO L226 Difference]: Without dead ends: 122 [2020-10-15 16:45:36,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=866, Invalid=2326, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 16:45:36,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-15 16:45:36,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-10-15 16:45:36,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-15 16:45:36,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-10-15 16:45:36,196 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 27 [2020-10-15 16:45:36,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:36,196 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-10-15 16:45:36,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:45:36,196 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-10-15 16:45:36,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:36,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:36,197 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:36,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-10-15 16:45:36,397 INFO L429 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:36,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:36,398 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 211 times [2020-10-15 16:45:36,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:36,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706523368] [2020-10-15 16:45:36,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:36,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:36,676 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:36,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706523368] [2020-10-15 16:45:36,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054934198] [2020-10-15 16:45:36,677 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:36,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:36,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:36,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:36,746 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:36,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:36,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:45:36,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135178683] [2020-10-15 16:45:36,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:36,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:36,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:36,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:36,748 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 23 states. [2020-10-15 16:45:37,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:37,804 INFO L93 Difference]: Finished difference Result 129 states and 305 transitions. [2020-10-15 16:45:37,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 16:45:37,805 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:45:37,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:37,805 INFO L225 Difference]: With dead ends: 129 [2020-10-15 16:45:37,805 INFO L226 Difference]: Without dead ends: 123 [2020-10-15 16:45:37,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=958, Invalid=2348, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 16:45:37,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-15 16:45:37,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-10-15 16:45:37,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:45:37,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 16:45:37,807 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 27 [2020-10-15 16:45:37,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:37,808 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 16:45:37,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:37,808 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 16:45:37,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:37,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:37,808 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:38,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-10-15 16:45:38,014 INFO L429 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:38,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:38,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1726955231, now seen corresponding path program 212 times [2020-10-15 16:45:38,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:38,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645640242] [2020-10-15 16:45:38,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:38,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:38,297 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:38,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645640242] [2020-10-15 16:45:38,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269136723] [2020-10-15 16:45:38,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:38,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:45:38,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:38,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:38,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:38,370 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:38,387 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:38,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:38,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:45:38,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717534869] [2020-10-15 16:45:38,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:45:38,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:38,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:45:38,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:45:38,389 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 24 states. [2020-10-15 16:45:39,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:39,670 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-10-15 16:45:39,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 16:45:39,670 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:45:39,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:39,671 INFO L225 Difference]: With dead ends: 126 [2020-10-15 16:45:39,671 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 16:45:39,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=967, Invalid=2455, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 16:45:39,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 16:45:39,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-10-15 16:45:39,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:45:39,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 16:45:39,673 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 27 [2020-10-15 16:45:39,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:39,673 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 16:45:39,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:45:39,674 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 16:45:39,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:39,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:39,674 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:39,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-10-15 16:45:39,875 INFO L429 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:39,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:39,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 213 times [2020-10-15 16:45:39,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:39,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225762772] [2020-10-15 16:45:39,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:39,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:40,146 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:40,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225762772] [2020-10-15 16:45:40,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108346793] [2020-10-15 16:45:40,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:40,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 16:45:40,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:40,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:40,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:40,225 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:40,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:40,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:45:40,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954242168] [2020-10-15 16:45:40,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:40,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:40,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:40,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:40,227 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 23 states. [2020-10-15 16:45:41,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:41,350 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2020-10-15 16:45:41,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 16:45:41,351 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:45:41,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:41,351 INFO L225 Difference]: With dead ends: 127 [2020-10-15 16:45:41,351 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 16:45:41,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1074, Invalid=2466, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 16:45:41,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 16:45:41,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2020-10-15 16:45:41,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-15 16:45:41,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-10-15 16:45:41,354 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 27 [2020-10-15 16:45:41,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:41,354 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-10-15 16:45:41,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:41,354 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-10-15 16:45:41,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:41,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:41,354 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:41,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:41,555 INFO L429 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:41,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:41,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1239872381, now seen corresponding path program 214 times [2020-10-15 16:45:41,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:41,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600815893] [2020-10-15 16:45:41,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:41,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:41,838 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:41,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600815893] [2020-10-15 16:45:41,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780556464] [2020-10-15 16:45:41,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:41,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:45:41,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:41,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:41,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:41,912 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:41,930 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:41,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:41,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:45:41,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553524989] [2020-10-15 16:45:41,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:45:41,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:41,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:45:41,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:45:41,931 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-10-15 16:45:43,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:43,321 INFO L93 Difference]: Finished difference Result 124 states and 297 transitions. [2020-10-15 16:45:43,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 16:45:43,322 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:45:43,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:43,322 INFO L225 Difference]: With dead ends: 124 [2020-10-15 16:45:43,322 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 16:45:43,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1084, Invalid=2576, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 16:45:43,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 16:45:43,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2020-10-15 16:45:43,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 16:45:43,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-15 16:45:43,325 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 27 [2020-10-15 16:45:43,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:43,325 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-15 16:45:43,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:45:43,325 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-15 16:45:43,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:43,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:43,325 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:43,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-10-15 16:45:43,526 INFO L429 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:43,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:43,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 215 times [2020-10-15 16:45:43,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:43,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632592062] [2020-10-15 16:45:43,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:43,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:43,811 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:43,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632592062] [2020-10-15 16:45:43,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341380103] [2020-10-15 16:45:43,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:43,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 16:45:43,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:43,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:43,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:43,886 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:43,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:43,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:45:43,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067380039] [2020-10-15 16:45:43,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:43,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:43,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:43,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:43,887 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 23 states. [2020-10-15 16:45:45,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:45,068 INFO L93 Difference]: Finished difference Result 144 states and 347 transitions. [2020-10-15 16:45:45,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 16:45:45,069 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:45:45,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:45,070 INFO L225 Difference]: With dead ends: 144 [2020-10-15 16:45:45,070 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 16:45:45,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1206, Invalid=2576, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 16:45:45,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 16:45:45,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2020-10-15 16:45:45,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 16:45:45,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 245 transitions. [2020-10-15 16:45:45,073 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 245 transitions. Word has length 27 [2020-10-15 16:45:45,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:45,073 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 245 transitions. [2020-10-15 16:45:45,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:45,073 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 245 transitions. [2020-10-15 16:45:45,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:45,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:45,074 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:45,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:45,284 INFO L429 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:45,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:45,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1239365531, now seen corresponding path program 216 times [2020-10-15 16:45:45,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:45,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938543001] [2020-10-15 16:45:45,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:45,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:45,565 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:45,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938543001] [2020-10-15 16:45:45,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080127977] [2020-10-15 16:45:45,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:45,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 16:45:45,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:45,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:45,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:45,644 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:45,663 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:45,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:45,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:45:45,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350592979] [2020-10-15 16:45:45,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:45:45,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:45,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:45:45,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:45:45,664 INFO L87 Difference]: Start difference. First operand 94 states and 245 transitions. Second operand 24 states. [2020-10-15 16:45:47,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:47,092 INFO L93 Difference]: Finished difference Result 125 states and 303 transitions. [2020-10-15 16:45:47,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 16:45:47,093 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:45:47,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:47,093 INFO L225 Difference]: With dead ends: 125 [2020-10-15 16:45:47,093 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 16:45:47,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 16:45:47,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 16:45:47,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-10-15 16:45:47,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 16:45:47,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-10-15 16:45:47,096 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-10-15 16:45:47,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:47,096 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-10-15 16:45:47,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:45:47,096 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-10-15 16:45:47,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:45:47,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:47,096 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:47,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-10-15 16:45:47,297 INFO L429 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:47,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:47,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 217 times [2020-10-15 16:45:47,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:47,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371973930] [2020-10-15 16:45:47,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:47,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:47,691 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:47,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371973930] [2020-10-15 16:45:47,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67126238] [2020-10-15 16:45:47,691 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:47,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:47,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:45:47,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:47,752 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:47,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:47,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 16:45:47,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395569281] [2020-10-15 16:45:47,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:45:47,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:47,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:45:47,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:45:47,754 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 24 states. [2020-10-15 16:45:48,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:48,401 INFO L93 Difference]: Finished difference Result 144 states and 339 transitions. [2020-10-15 16:45:48,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:45:48,402 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 16:45:48,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:48,402 INFO L225 Difference]: With dead ends: 144 [2020-10-15 16:45:48,402 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 16:45:48,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=603, Invalid=1377, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:45:48,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 16:45:48,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 93. [2020-10-15 16:45:48,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 16:45:48,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 16:45:48,405 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 16:45:48,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:48,406 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 16:45:48,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:45:48,406 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 16:45:48,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:45:48,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:48,406 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:48,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:48,607 INFO L429 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:48,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:48,608 INFO L82 PathProgramCache]: Analyzing trace with hash 627867998, now seen corresponding path program 218 times [2020-10-15 16:45:48,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:48,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645159576] [2020-10-15 16:45:48,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:48,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:49,010 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:49,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645159576] [2020-10-15 16:45:49,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602395301] [2020-10-15 16:45:49,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:49,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:45:49,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:49,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:45:49,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:49,082 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:49,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:49,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 16:45:49,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051834905] [2020-10-15 16:45:49,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:45:49,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:49,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:45:49,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:45:49,095 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 16:45:49,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:49,827 INFO L93 Difference]: Finished difference Result 141 states and 333 transitions. [2020-10-15 16:45:49,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:45:49,828 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 16:45:49,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:49,829 INFO L225 Difference]: With dead ends: 141 [2020-10-15 16:45:49,829 INFO L226 Difference]: Without dead ends: 135 [2020-10-15 16:45:49,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=653, Invalid=1603, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 16:45:49,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-15 16:45:49,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 92. [2020-10-15 16:45:49,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:45:49,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 16:45:49,831 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 16:45:49,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:49,831 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 16:45:49,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:45:49,832 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 16:45:49,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:45:49,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:49,832 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:50,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2020-10-15 16:45:50,033 INFO L429 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:50,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:50,033 INFO L82 PathProgramCache]: Analyzing trace with hash -556056612, now seen corresponding path program 219 times [2020-10-15 16:45:50,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:50,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651836891] [2020-10-15 16:45:50,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:50,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:50,403 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:50,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651836891] [2020-10-15 16:45:50,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109945563] [2020-10-15 16:45:50,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:50,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 16:45:50,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:50,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:45:50,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:50,470 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:50,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:50,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 16:45:50,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636170486] [2020-10-15 16:45:50,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:45:50,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:50,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:45:50,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:45:50,472 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 16:45:51,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:51,186 INFO L93 Difference]: Finished difference Result 138 states and 327 transitions. [2020-10-15 16:45:51,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:45:51,187 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 16:45:51,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:51,187 INFO L225 Difference]: With dead ends: 138 [2020-10-15 16:45:51,187 INFO L226 Difference]: Without dead ends: 132 [2020-10-15 16:45:51,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=608, Invalid=1554, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 16:45:51,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-15 16:45:51,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 93. [2020-10-15 16:45:51,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 16:45:51,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 16:45:51,189 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 16:45:51,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:51,190 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 16:45:51,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:45:51,190 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 16:45:51,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:45:51,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:51,190 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:51,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:51,391 INFO L429 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:51,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:51,391 INFO L82 PathProgramCache]: Analyzing trace with hash -2104215232, now seen corresponding path program 220 times [2020-10-15 16:45:51,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:51,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63693744] [2020-10-15 16:45:51,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:51,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:51,769 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:51,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63693744] [2020-10-15 16:45:51,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667848318] [2020-10-15 16:45:51,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:51,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:45:51,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:51,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:45:51,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:51,851 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:51,864 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:51,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:51,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 16:45:51,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682902102] [2020-10-15 16:45:51,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:45:51,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:51,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:45:51,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:45:51,865 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 16:45:52,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:52,727 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-10-15 16:45:52,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:45:52,728 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 16:45:52,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:52,728 INFO L225 Difference]: With dead ends: 137 [2020-10-15 16:45:52,729 INFO L226 Difference]: Without dead ends: 131 [2020-10-15 16:45:52,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=665, Invalid=1785, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 16:45:52,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-15 16:45:52,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 92. [2020-10-15 16:45:52,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:45:52,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 16:45:52,731 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 16:45:52,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:52,731 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 16:45:52,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:45:52,732 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 16:45:52,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:45:52,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:52,732 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:52,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2020-10-15 16:45:52,933 INFO L429 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:52,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:52,933 INFO L82 PathProgramCache]: Analyzing trace with hash 888962878, now seen corresponding path program 221 times [2020-10-15 16:45:52,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:52,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044369733] [2020-10-15 16:45:52,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:52,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:53,291 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:53,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044369733] [2020-10-15 16:45:53,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945132423] [2020-10-15 16:45:53,292 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:53,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 16:45:53,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:53,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:45:53,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:53,373 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:53,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:53,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 16:45:53,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121253168] [2020-10-15 16:45:53,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:45:53,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:53,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:45:53,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:45:53,374 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 16:45:54,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:54,181 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-10-15 16:45:54,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:45:54,182 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 16:45:54,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:54,182 INFO L225 Difference]: With dead ends: 134 [2020-10-15 16:45:54,182 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 16:45:54,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=629, Invalid=1723, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 16:45:54,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 16:45:54,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2020-10-15 16:45:54,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 16:45:54,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 16:45:54,185 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 16:45:54,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:54,185 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 16:45:54,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:45:54,185 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 16:45:54,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:45:54,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:54,186 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:54,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-10-15 16:45:54,393 INFO L429 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:54,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:54,393 INFO L82 PathProgramCache]: Analyzing trace with hash 78414242, now seen corresponding path program 222 times [2020-10-15 16:45:54,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:54,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876645206] [2020-10-15 16:45:54,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:54,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:54,754 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:54,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876645206] [2020-10-15 16:45:54,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813285407] [2020-10-15 16:45:54,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:54,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 16:45:54,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:54,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:45:54,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:54,842 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:54,861 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:54,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:54,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 16:45:54,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787454405] [2020-10-15 16:45:54,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:45:54,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:54,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:45:54,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:45:54,862 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 16:45:55,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:55,834 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-10-15 16:45:55,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:45:55,835 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 16:45:55,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:55,836 INFO L225 Difference]: With dead ends: 133 [2020-10-15 16:45:55,836 INFO L226 Difference]: Without dead ends: 127 [2020-10-15 16:45:55,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=693, Invalid=1959, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 16:45:55,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-15 16:45:55,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 92. [2020-10-15 16:45:55,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:45:55,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 16:45:55,839 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 16:45:55,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:55,839 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 16:45:55,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:45:55,840 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 16:45:55,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:45:55,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:55,840 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:56,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-10-15 16:45:56,045 INFO L429 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:56,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:56,045 INFO L82 PathProgramCache]: Analyzing trace with hash 130690848, now seen corresponding path program 223 times [2020-10-15 16:45:56,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:56,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902422456] [2020-10-15 16:45:56,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:56,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:56,390 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:56,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902422456] [2020-10-15 16:45:56,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593290493] [2020-10-15 16:45:56,390 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:56,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:56,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:45:56,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:56,454 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:56,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:56,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 16:45:56,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565313754] [2020-10-15 16:45:56,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:45:56,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:56,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:45:56,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:45:56,456 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 16:45:57,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:57,335 INFO L93 Difference]: Finished difference Result 130 states and 311 transitions. [2020-10-15 16:45:57,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:45:57,336 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 16:45:57,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:57,337 INFO L225 Difference]: With dead ends: 130 [2020-10-15 16:45:57,337 INFO L226 Difference]: Without dead ends: 124 [2020-10-15 16:45:57,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=666, Invalid=1884, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 16:45:57,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-15 16:45:57,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 93. [2020-10-15 16:45:57,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 16:45:57,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 16:45:57,340 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 16:45:57,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:57,340 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 16:45:57,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:45:57,340 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 16:45:57,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:45:57,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:57,341 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:57,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:57,543 INFO L429 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:57,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:57,543 INFO L82 PathProgramCache]: Analyzing trace with hash 2006940292, now seen corresponding path program 224 times [2020-10-15 16:45:57,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:57,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463930802] [2020-10-15 16:45:57,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:57,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:57,897 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:57,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463930802] [2020-10-15 16:45:57,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410594206] [2020-10-15 16:45:57,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:57,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:45:57,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:57,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:45:57,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:57,971 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:57,985 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:57,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:57,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 16:45:57,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81070028] [2020-10-15 16:45:57,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:45:57,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:57,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:45:57,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:45:57,986 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 16:45:59,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:59,068 INFO L93 Difference]: Finished difference Result 129 states and 309 transitions. [2020-10-15 16:45:59,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:45:59,069 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 16:45:59,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:59,069 INFO L225 Difference]: With dead ends: 129 [2020-10-15 16:45:59,069 INFO L226 Difference]: Without dead ends: 123 [2020-10-15 16:45:59,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=737, Invalid=2125, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 16:45:59,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-15 16:45:59,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 92. [2020-10-15 16:45:59,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:45:59,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 16:45:59,072 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 16:45:59,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:59,072 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 16:45:59,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:45:59,073 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 16:45:59,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:45:59,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:59,073 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:59,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-10-15 16:45:59,274 INFO L429 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:59,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:59,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1599705214, now seen corresponding path program 225 times [2020-10-15 16:45:59,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:59,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812634574] [2020-10-15 16:45:59,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:59,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:59,604 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:59,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812634574] [2020-10-15 16:45:59,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530094623] [2020-10-15 16:45:59,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:59,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 16:45:59,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:59,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:45:59,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:59,682 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:59,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:59,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 16:45:59,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888763691] [2020-10-15 16:45:59,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:45:59,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:59,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:45:59,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:45:59,683 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 16:46:00,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:00,642 INFO L93 Difference]: Finished difference Result 126 states and 303 transitions. [2020-10-15 16:46:00,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 16:46:00,643 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 16:46:00,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:00,643 INFO L225 Difference]: With dead ends: 126 [2020-10-15 16:46:00,643 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 16:46:00,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=719, Invalid=2037, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 16:46:00,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 16:46:00,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 93. [2020-10-15 16:46:00,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 16:46:00,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 16:46:00,646 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 16:46:00,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:00,647 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 16:46:00,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:00,647 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 16:46:00,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:00,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:00,647 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:00,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:00,848 INFO L429 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:00,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:00,849 INFO L82 PathProgramCache]: Analyzing trace with hash -614513690, now seen corresponding path program 226 times [2020-10-15 16:46:00,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:00,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80871192] [2020-10-15 16:46:00,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:00,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:01,186 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:01,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80871192] [2020-10-15 16:46:01,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172635133] [2020-10-15 16:46:01,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:01,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:46:01,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:01,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:01,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:01,267 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:46:01,284 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:01,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:01,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 16:46:01,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415402685] [2020-10-15 16:46:01,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:46:01,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:01,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:46:01,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:46:01,286 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 16:46:02,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:02,479 INFO L93 Difference]: Finished difference Result 125 states and 301 transitions. [2020-10-15 16:46:02,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:46:02,480 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 16:46:02,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:02,480 INFO L225 Difference]: With dead ends: 125 [2020-10-15 16:46:02,480 INFO L226 Difference]: Without dead ends: 119 [2020-10-15 16:46:02,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=797, Invalid=2283, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 16:46:02,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-15 16:46:02,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2020-10-15 16:46:02,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:46:02,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 16:46:02,483 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 16:46:02,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:02,483 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 16:46:02,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:46:02,483 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 16:46:02,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:02,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:02,484 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:02,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2020-10-15 16:46:02,686 INFO L429 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:02,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:02,686 INFO L82 PathProgramCache]: Analyzing trace with hash 2063294564, now seen corresponding path program 227 times [2020-10-15 16:46:02,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:02,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074656029] [2020-10-15 16:46:02,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:02,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:03,011 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:03,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074656029] [2020-10-15 16:46:03,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84065131] [2020-10-15 16:46:03,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:03,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 16:46:03,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:03,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:03,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:03,097 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:03,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:03,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 16:46:03,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93106079] [2020-10-15 16:46:03,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:46:03,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:03,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:46:03,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:46:03,099 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 16:46:04,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:04,148 INFO L93 Difference]: Finished difference Result 122 states and 295 transitions. [2020-10-15 16:46:04,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:46:04,149 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 16:46:04,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:04,149 INFO L225 Difference]: With dead ends: 122 [2020-10-15 16:46:04,149 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 16:46:04,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=788, Invalid=2182, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 16:46:04,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 16:46:04,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2020-10-15 16:46:04,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 16:46:04,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 16:46:04,153 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 16:46:04,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:04,153 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 16:46:04,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:04,153 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 16:46:04,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:04,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:04,154 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:04,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:04,359 INFO L429 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:04,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:04,359 INFO L82 PathProgramCache]: Analyzing trace with hash -974783032, now seen corresponding path program 228 times [2020-10-15 16:46:04,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:04,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768130480] [2020-10-15 16:46:04,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:04,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:04,683 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:04,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768130480] [2020-10-15 16:46:04,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046259115] [2020-10-15 16:46:04,683 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:04,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 16:46:04,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:04,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:04,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:04,764 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:46:04,787 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:04,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:04,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 16:46:04,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338054507] [2020-10-15 16:46:04,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:46:04,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:04,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:46:04,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:46:04,788 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 16:46:06,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:06,076 INFO L93 Difference]: Finished difference Result 121 states and 293 transitions. [2020-10-15 16:46:06,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 16:46:06,077 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 16:46:06,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:06,077 INFO L225 Difference]: With dead ends: 121 [2020-10-15 16:46:06,077 INFO L226 Difference]: Without dead ends: 115 [2020-10-15 16:46:06,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=873, Invalid=2433, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 16:46:06,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-15 16:46:06,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2020-10-15 16:46:06,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:46:06,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 16:46:06,080 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 16:46:06,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:06,080 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 16:46:06,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:46:06,080 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 16:46:06,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:06,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:06,081 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:06,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2020-10-15 16:46:06,282 INFO L429 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:06,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:06,282 INFO L82 PathProgramCache]: Analyzing trace with hash 641409478, now seen corresponding path program 229 times [2020-10-15 16:46:06,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:06,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921390698] [2020-10-15 16:46:06,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:06,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:06,593 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:06,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921390698] [2020-10-15 16:46:06,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975986887] [2020-10-15 16:46:06,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:06,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:06,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:06,662 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:06,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:06,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 16:46:06,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774875592] [2020-10-15 16:46:06,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:46:06,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:06,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:46:06,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:46:06,663 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 16:46:07,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:07,780 INFO L93 Difference]: Finished difference Result 118 states and 287 transitions. [2020-10-15 16:46:07,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 16:46:07,781 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 16:46:07,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:07,781 INFO L225 Difference]: With dead ends: 118 [2020-10-15 16:46:07,782 INFO L226 Difference]: Without dead ends: 112 [2020-10-15 16:46:07,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=873, Invalid=2319, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 16:46:07,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-15 16:46:07,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2020-10-15 16:46:07,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 16:46:07,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 16:46:07,784 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 16:46:07,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:07,784 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 16:46:07,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:07,785 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 16:46:07,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:07,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:07,785 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:07,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:07,986 INFO L429 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:07,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:07,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1161152554, now seen corresponding path program 230 times [2020-10-15 16:46:07,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:07,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776641613] [2020-10-15 16:46:07,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:07,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:08,313 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:08,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776641613] [2020-10-15 16:46:08,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434957061] [2020-10-15 16:46:08,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:08,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:46:08,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:08,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:08,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:08,391 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:46:08,410 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:08,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:08,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 16:46:08,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400293555] [2020-10-15 16:46:08,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:46:08,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:08,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:46:08,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:46:08,411 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 16:46:09,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:09,823 INFO L93 Difference]: Finished difference Result 117 states and 285 transitions. [2020-10-15 16:46:09,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 16:46:09,824 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 16:46:09,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:09,824 INFO L225 Difference]: With dead ends: 117 [2020-10-15 16:46:09,824 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 16:46:09,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=965, Invalid=2575, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 16:46:09,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 16:46:09,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2020-10-15 16:46:09,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:46:09,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 16:46:09,827 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 16:46:09,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:09,827 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 16:46:09,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:46:09,827 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 16:46:09,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:09,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:09,828 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:10,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:10,028 INFO L429 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:10,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:10,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1478503512, now seen corresponding path program 231 times [2020-10-15 16:46:10,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:10,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713962437] [2020-10-15 16:46:10,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:10,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:10,344 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:10,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713962437] [2020-10-15 16:46:10,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140552842] [2020-10-15 16:46:10,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:10,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 16:46:10,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:10,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:10,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:10,421 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:10,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:10,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 16:46:10,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628609011] [2020-10-15 16:46:10,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:46:10,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:10,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:46:10,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:46:10,423 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 16:46:11,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:11,612 INFO L93 Difference]: Finished difference Result 114 states and 279 transitions. [2020-10-15 16:46:11,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 16:46:11,613 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 16:46:11,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:11,613 INFO L225 Difference]: With dead ends: 114 [2020-10-15 16:46:11,613 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 16:46:11,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=974, Invalid=2448, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 16:46:11,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 16:46:11,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2020-10-15 16:46:11,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 16:46:11,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 16:46:11,616 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 16:46:11,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:11,616 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 16:46:11,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:11,617 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 16:46:11,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:11,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:11,617 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:11,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-10-15 16:46:11,819 INFO L429 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:11,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:11,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1096336140, now seen corresponding path program 232 times [2020-10-15 16:46:11,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:11,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745432426] [2020-10-15 16:46:11,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:11,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:12,134 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:12,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745432426] [2020-10-15 16:46:12,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903655593] [2020-10-15 16:46:12,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:12,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:46:12,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:12,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:12,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:12,217 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:46:12,237 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:12,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:12,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 16:46:12,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111091092] [2020-10-15 16:46:12,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:46:12,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:12,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:46:12,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:46:12,238 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 16:46:13,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:13,753 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-10-15 16:46:13,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 16:46:13,754 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 16:46:13,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:13,755 INFO L225 Difference]: With dead ends: 113 [2020-10-15 16:46:13,755 INFO L226 Difference]: Without dead ends: 107 [2020-10-15 16:46:13,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1073, Invalid=2709, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 16:46:13,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-15 16:46:13,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 92. [2020-10-15 16:46:13,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:46:13,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 16:46:13,757 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 16:46:13,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:13,757 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 16:46:13,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:46:13,758 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 16:46:13,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:13,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:13,758 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:13,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-10-15 16:46:13,959 INFO L429 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:13,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:13,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1567331850, now seen corresponding path program 233 times [2020-10-15 16:46:13,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:13,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349397343] [2020-10-15 16:46:13,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:13,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:14,272 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:14,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349397343] [2020-10-15 16:46:14,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144076351] [2020-10-15 16:46:14,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:14,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 16:46:14,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:14,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:14,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:14,364 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:14,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:14,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 16:46:14,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109295788] [2020-10-15 16:46:14,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:46:14,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:14,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:46:14,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:46:14,366 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 16:46:15,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:15,678 INFO L93 Difference]: Finished difference Result 110 states and 271 transitions. [2020-10-15 16:46:15,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 16:46:15,679 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 16:46:15,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:15,679 INFO L225 Difference]: With dead ends: 110 [2020-10-15 16:46:15,679 INFO L226 Difference]: Without dead ends: 104 [2020-10-15 16:46:15,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1091, Invalid=2569, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 16:46:15,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-15 16:46:15,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2020-10-15 16:46:15,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 16:46:15,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 16:46:15,682 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 16:46:15,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:15,682 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 16:46:15,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:15,682 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 16:46:15,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:15,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:15,683 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:15,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-10-15 16:46:15,883 INFO L429 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:15,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:15,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1583418990, now seen corresponding path program 234 times [2020-10-15 16:46:15,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:15,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753122933] [2020-10-15 16:46:15,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:16,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753122933] [2020-10-15 16:46:16,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725606914] [2020-10-15 16:46:16,197 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:16,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 16:46:16,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:16,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:16,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:16,281 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:46:16,301 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:16,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:16,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 16:46:16,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175837148] [2020-10-15 16:46:16,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:46:16,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:16,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:46:16,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:46:16,302 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 16:46:17,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:17,953 INFO L93 Difference]: Finished difference Result 109 states and 269 transitions. [2020-10-15 16:46:17,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 16:46:17,954 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 16:46:17,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:17,954 INFO L225 Difference]: With dead ends: 109 [2020-10-15 16:46:17,954 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 16:46:17,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1197, Invalid=2835, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 16:46:17,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 16:46:17,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 92. [2020-10-15 16:46:17,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:46:17,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 16:46:17,957 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 16:46:17,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:17,957 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 16:46:17,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:46:17,957 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 16:46:17,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:17,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:17,958 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:18,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-10-15 16:46:18,159 INFO L429 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:18,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:18,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1583909100, now seen corresponding path program 235 times [2020-10-15 16:46:18,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:18,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333074145] [2020-10-15 16:46:18,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:18,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:18,479 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:18,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333074145] [2020-10-15 16:46:18,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175435069] [2020-10-15 16:46:18,480 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:18,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:18,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:18,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:18,556 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:18,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:18,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 16:46:18,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162241126] [2020-10-15 16:46:18,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:46:18,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:18,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:46:18,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:46:18,557 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 16:46:19,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:19,920 INFO L93 Difference]: Finished difference Result 125 states and 309 transitions. [2020-10-15 16:46:19,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 16:46:19,921 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 16:46:19,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:19,922 INFO L225 Difference]: With dead ends: 125 [2020-10-15 16:46:19,922 INFO L226 Difference]: Without dead ends: 119 [2020-10-15 16:46:19,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1224, Invalid=2682, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 16:46:19,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-15 16:46:19,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 96. [2020-10-15 16:46:19,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-15 16:46:19,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 249 transitions. [2020-10-15 16:46:19,924 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 249 transitions. Word has length 28 [2020-10-15 16:46:19,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:19,925 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 249 transitions. [2020-10-15 16:46:19,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:19,925 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 249 transitions. [2020-10-15 16:46:19,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:19,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:19,925 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:20,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-10-15 16:46:20,126 INFO L429 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:20,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:20,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1583925840, now seen corresponding path program 236 times [2020-10-15 16:46:20,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:20,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139525289] [2020-10-15 16:46:20,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:20,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:20,442 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:20,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139525289] [2020-10-15 16:46:20,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049102714] [2020-10-15 16:46:20,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:20,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:46:20,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:20,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:46:20,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:20,546 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:20,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:20,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 16:46:20,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926383196] [2020-10-15 16:46:20,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:46:20,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:20,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:46:20,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:46:20,548 INFO L87 Difference]: Start difference. First operand 96 states and 249 transitions. Second operand 25 states. [2020-10-15 16:46:22,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:22,064 INFO L93 Difference]: Finished difference Result 104 states and 261 transitions. [2020-10-15 16:46:22,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 16:46:22,065 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 16:46:22,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:22,065 INFO L225 Difference]: With dead ends: 104 [2020-10-15 16:46:22,065 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 16:46:22,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1121, Invalid=2911, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 16:46:22,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 16:46:22,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 69. [2020-10-15 16:46:22,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 16:46:22,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 168 transitions. [2020-10-15 16:46:22,067 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 168 transitions. Word has length 28 [2020-10-15 16:46:22,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:22,067 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 168 transitions. [2020-10-15 16:46:22,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:46:22,068 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 168 transitions. [2020-10-15 16:46:22,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:22,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:22,068 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:22,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:22,269 INFO L429 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:22,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:22,269 INFO L82 PathProgramCache]: Analyzing trace with hash 234390510, now seen corresponding path program 237 times [2020-10-15 16:46:22,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:22,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450465993] [2020-10-15 16:46:22,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:22,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:22,591 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:22,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450465993] [2020-10-15 16:46:22,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793497559] [2020-10-15 16:46:22,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:22,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 16:46:22,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:22,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:22,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:22,674 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:46:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:22,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:22,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 16:46:22,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468598837] [2020-10-15 16:46:22,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:46:22,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:22,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:46:22,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:46:22,704 INFO L87 Difference]: Start difference. First operand 69 states and 168 transitions. Second operand 25 states. [2020-10-15 16:46:24,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:24,287 INFO L93 Difference]: Finished difference Result 124 states and 303 transitions. [2020-10-15 16:46:24,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 16:46:24,288 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 16:46:24,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:24,288 INFO L225 Difference]: With dead ends: 124 [2020-10-15 16:46:24,288 INFO L226 Difference]: Without dead ends: 119 [2020-10-15 16:46:24,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1390, Invalid=2900, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 16:46:24,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-15 16:46:24,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 94. [2020-10-15 16:46:24,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 16:46:24,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 241 transitions. [2020-10-15 16:46:24,290 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 241 transitions. Word has length 28 [2020-10-15 16:46:24,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:24,290 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 241 transitions. [2020-10-15 16:46:24,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:46:24,290 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 241 transitions. [2020-10-15 16:46:24,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:46:24,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:24,291 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:24,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-10-15 16:46:24,492 INFO L429 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:24,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:24,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1857077091, now seen corresponding path program 238 times [2020-10-15 16:46:24,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:24,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94741614] [2020-10-15 16:46:24,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:24,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:24,655 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 72 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:24,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94741614] [2020-10-15 16:46:24,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897540276] [2020-10-15 16:46:24,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:24,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:46:24,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:24,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:46:24,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:24,777 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:24,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-15 16:46:24,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2020-10-15 16:46:24,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559558380] [2020-10-15 16:46:24,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:46:24,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:24,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:46:24,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:46:24,779 INFO L87 Difference]: Start difference. First operand 94 states and 241 transitions. Second operand 13 states. [2020-10-15 16:46:24,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:24,808 INFO L93 Difference]: Finished difference Result 421 states and 1013 transitions. [2020-10-15 16:46:24,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:46:24,809 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-15 16:46:24,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:24,809 INFO L225 Difference]: With dead ends: 421 [2020-10-15 16:46:24,810 INFO L226 Difference]: Without dead ends: 70 [2020-10-15 16:46:24,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:46:24,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-15 16:46:24,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-15 16:46:24,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 16:46:24,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 140 transitions. [2020-10-15 16:46:24,812 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 140 transitions. Word has length 29 [2020-10-15 16:46:24,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:24,812 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 140 transitions. [2020-10-15 16:46:24,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:46:24,812 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 140 transitions. [2020-10-15 16:46:24,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:46:24,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:24,812 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:25,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:25,019 INFO L429 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:25,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:25,020 INFO L82 PathProgramCache]: Analyzing trace with hash 65865102, now seen corresponding path program 239 times [2020-10-15 16:46:25,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:25,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82270851] [2020-10-15 16:46:25,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:25,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:25,484 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:25,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82270851] [2020-10-15 16:46:25,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468082531] [2020-10-15 16:46:25,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:25,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-15 16:46:25,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:25,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:46:25,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:25,905 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:25,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-15 16:46:25,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [23] total 36 [2020-10-15 16:46:25,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958153181] [2020-10-15 16:46:25,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:46:25,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:25,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:46:25,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:46:25,907 INFO L87 Difference]: Start difference. First operand 70 states and 140 transitions. Second operand 13 states. [2020-10-15 16:46:25,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:25,955 INFO L93 Difference]: Finished difference Result 256 states and 475 transitions. [2020-10-15 16:46:25,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:46:25,956 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-15 16:46:25,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:25,956 INFO L225 Difference]: With dead ends: 256 [2020-10-15 16:46:25,956 INFO L226 Difference]: Without dead ends: 0 [2020-10-15 16:46:25,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:46:25,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-15 16:46:25,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-15 16:46:25,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-15 16:46:25,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-15 16:46:25,957 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-10-15 16:46:25,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:25,957 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-15 16:46:25,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:46:25,958 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-15 16:46:25,958 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-15 16:46:26,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:26,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 04:46:26 BasicIcfg [2020-10-15 16:46:26,164 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-15 16:46:26,166 INFO L168 Benchmark]: Toolchain (without parser) took 260771.96 ms. Allocated memory was 248.5 MB in the beginning and 245.4 MB in the end (delta: -3.1 MB). Free memory was 203.7 MB in the beginning and 163.6 MB in the end (delta: 40.1 MB). Peak memory consumption was 37.0 MB. Max. memory is 14.2 GB. [2020-10-15 16:46:26,167 INFO L168 Benchmark]: CDTParser took 1.35 ms. Allocated memory is still 248.5 MB. Free memory was 226.6 MB in the beginning and 225.7 MB in the end (delta: 839.0 kB). Peak memory consumption was 839.0 kB. Max. memory is 14.2 GB. [2020-10-15 16:46:26,168 INFO L168 Benchmark]: CACSL2BoogieTranslator took 704.79 ms. Allocated memory was 248.5 MB in the beginning and 305.1 MB in the end (delta: 56.6 MB). Free memory was 203.7 MB in the beginning and 261.8 MB in the end (delta: -58.2 MB). Peak memory consumption was 30.1 MB. Max. memory is 14.2 GB. [2020-10-15 16:46:26,168 INFO L168 Benchmark]: Boogie Procedure Inliner took 70.97 ms. Allocated memory is still 305.1 MB. Free memory was 261.8 MB in the beginning and 259.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-15 16:46:26,171 INFO L168 Benchmark]: Boogie Preprocessor took 23.90 ms. Allocated memory is still 305.1 MB. Free memory was 259.3 MB in the beginning and 257.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.2 GB. [2020-10-15 16:46:26,171 INFO L168 Benchmark]: RCFGBuilder took 352.53 ms. Allocated memory is still 305.1 MB. Free memory was 257.6 MB in the beginning and 237.4 MB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 14.2 GB. [2020-10-15 16:46:26,172 INFO L168 Benchmark]: TraceAbstraction took 259613.61 ms. Allocated memory was 305.1 MB in the beginning and 245.4 MB in the end (delta: -59.8 MB). Free memory was 236.5 MB in the beginning and 163.6 MB in the end (delta: 73.0 MB). Peak memory consumption was 13.2 MB. Max. memory is 14.2 GB. [2020-10-15 16:46:26,174 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.35 ms. Allocated memory is still 248.5 MB. Free memory was 226.6 MB in the beginning and 225.7 MB in the end (delta: 839.0 kB). Peak memory consumption was 839.0 kB. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 704.79 ms. Allocated memory was 248.5 MB in the beginning and 305.1 MB in the end (delta: 56.6 MB). Free memory was 203.7 MB in the beginning and 261.8 MB in the end (delta: -58.2 MB). Peak memory consumption was 30.1 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 70.97 ms. Allocated memory is still 305.1 MB. Free memory was 261.8 MB in the beginning and 259.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 23.90 ms. Allocated memory is still 305.1 MB. Free memory was 259.3 MB in the beginning and 257.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.2 GB. * RCFGBuilder took 352.53 ms. Allocated memory is still 305.1 MB. Free memory was 257.6 MB in the beginning and 237.4 MB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 14.2 GB. * TraceAbstraction took 259613.61 ms. Allocated memory was 305.1 MB in the beginning and 245.4 MB in the end (delta: -59.8 MB). Free memory was 236.5 MB in the beginning and 163.6 MB in the end (delta: 73.0 MB). Peak memory consumption was 13.2 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 618 VarBasedMoverChecksPositive, 16 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 19 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.3s, 57 PlacesBefore, 20 PlacesAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 45 TotalNumberOfCompositions, 911 MoverChecksTotal - PositiveResult [Line: 703]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 259.4s, OverallIterations: 241, TraceHistogramMax: 11, AutomataDifference: 145.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 3935 SDtfs, 13973 SDslu, 25157 SDs, 0 SdLazy, 27289 SolverSat, 16264 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 25.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13658 GetRequests, 4494 SyntacticMatches, 234 SemanticMatches, 8930 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91491 ImplicationChecksByTransitivity, 151.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=237, 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, 241 MinimizatonAttempts, 6070 StatesRemovedByMinimization, 238 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.7s SsaConstructionTime, 5.1s SatisfiabilityAnalysisTime, 49.7s InterpolantComputationTime, 10246 NumberOfCodeBlocks, 10244 NumberOfCodeBlocksAsserted, 1270 NumberOfCheckSat, 9769 ConstructedInterpolants, 0 QuantifiedInterpolants, 956995 SizeOfPredicates, 3171 NumberOfNonLiveVariables, 31166 ConjunctsInSsa, 4133 ConjunctsInUnsatCore, 477 InterpolantComputations, 7 PerfectInterpolantSequences, 272/21430 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...