/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-17 14:30:53,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-17 14:30:53,934 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-17 14:30:53,951 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-17 14:30:53,952 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-17 14:30:53,953 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-17 14:30:53,955 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-17 14:30:53,964 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-17 14:30:53,967 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-17 14:30:53,970 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-17 14:30:53,972 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-17 14:30:53,973 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-17 14:30:53,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-17 14:30:53,975 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-17 14:30:53,977 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-17 14:30:53,979 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-17 14:30:53,980 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-17 14:30:53,981 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-17 14:30:53,982 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-17 14:30:53,987 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-17 14:30:53,992 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-17 14:30:53,995 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-17 14:30:53,996 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-17 14:30:53,997 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-17 14:30:53,999 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-17 14:30:54,000 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-17 14:30:54,000 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-17 14:30:54,001 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-17 14:30:54,003 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-17 14:30:54,005 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-17 14:30:54,005 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-17 14:30:54,005 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-17 14:30:54,006 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-17 14:30:54,007 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-17 14:30:54,008 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-17 14:30:54,008 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-17 14:30:54,009 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-17 14:30:54,009 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-17 14:30:54,009 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-17 14:30:54,010 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-17 14:30:54,011 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-17 14:30:54,012 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 [2020-04-17 14:30:54,047 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-17 14:30:54,048 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-17 14:30:54,052 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-17 14:30:54,052 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-17 14:30:54,052 INFO L138 SettingsManager]: * Use SBE=true [2020-04-17 14:30:54,053 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-17 14:30:54,053 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-17 14:30:54,055 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-17 14:30:54,055 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-17 14:30:54,056 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-17 14:30:54,056 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-17 14:30:54,056 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-17 14:30:54,056 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-17 14:30:54,056 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-17 14:30:54,057 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-17 14:30:54,057 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-17 14:30:54,057 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-17 14:30:54,057 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-17 14:30:54,057 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-17 14:30:54,058 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-17 14:30:54,058 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-17 14:30:54,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 14:30:54,059 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-17 14:30:54,059 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-17 14:30:54,060 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-17 14:30:54,060 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-04-17 14:30:54,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-17 14:30:54,060 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-17 14:30:54,060 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-04-17 14:30:54,060 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-17 14:30:54,349 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-17 14:30:54,362 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-17 14:30:54,366 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-17 14:30:54,367 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-17 14:30:54,367 INFO L275 PluginConnector]: CDTParser initialized [2020-04-17 14:30:54,368 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-2.i [2020-04-17 14:30:54,436 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf1848bd9/670f5243205c418cb33c4e4c738adf9a/FLAG6994890f1 [2020-04-17 14:30:55,049 INFO L306 CDTParser]: Found 1 translation units. [2020-04-17 14:30:55,049 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-2.i [2020-04-17 14:30:55,062 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf1848bd9/670f5243205c418cb33c4e4c738adf9a/FLAG6994890f1 [2020-04-17 14:30:55,288 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf1848bd9/670f5243205c418cb33c4e4c738adf9a [2020-04-17 14:30:55,296 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-17 14:30:55,319 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-17 14:30:55,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-17 14:30:55,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-17 14:30:55,324 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-17 14:30:55,325 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 02:30:55" (1/1) ... [2020-04-17 14:30:55,328 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fd8b268 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:55, skipping insertion in model container [2020-04-17 14:30:55,329 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 02:30:55" (1/1) ... [2020-04-17 14:30:55,335 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-17 14:30:55,393 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-17 14:30:55,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 14:30:55,869 INFO L203 MainTranslator]: Completed pre-run [2020-04-17 14:30:55,935 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 14:30:56,019 INFO L208 MainTranslator]: Completed translation [2020-04-17 14:30:56,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:56 WrapperNode [2020-04-17 14:30:56,019 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-17 14:30:56,020 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-17 14:30:56,020 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-17 14:30:56,021 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-17 14:30:56,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:56" (1/1) ... [2020-04-17 14:30:56,059 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:56" (1/1) ... [2020-04-17 14:30:56,077 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-17 14:30:56,078 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-17 14:30:56,078 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-17 14:30:56,078 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-17 14:30:56,084 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:56" (1/1) ... [2020-04-17 14:30:56,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:56" (1/1) ... [2020-04-17 14:30:56,087 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:56" (1/1) ... [2020-04-17 14:30:56,087 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:56" (1/1) ... [2020-04-17 14:30:56,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:56" (1/1) ... [2020-04-17 14:30:56,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:56" (1/1) ... [2020-04-17 14:30:56,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:56" (1/1) ... [2020-04-17 14:30:56,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-17 14:30:56,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-17 14:30:56,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-17 14:30:56,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-17 14:30:56,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 14:30:56,164 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-04-17 14:30:56,165 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-04-17 14:30:56,165 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-04-17 14:30:56,165 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-04-17 14:30:56,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-17 14:30:56,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-04-17 14:30:56,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-17 14:30:56,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-17 14:30:56,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-04-17 14:30:56,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-17 14:30:56,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-17 14:30:56,168 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-17 14:30:56,498 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-17 14:30:56,499 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-17 14:30:56,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 02:30:56 BoogieIcfgContainer [2020-04-17 14:30:56,502 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-17 14:30:56,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-17 14:30:56,504 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-17 14:30:56,507 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-17 14:30:56,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.04 02:30:55" (1/3) ... [2020-04-17 14:30:56,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59a46e72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 02:30:56, skipping insertion in model container [2020-04-17 14:30:56,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:56" (2/3) ... [2020-04-17 14:30:56,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59a46e72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 02:30:56, skipping insertion in model container [2020-04-17 14:30:56,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 02:30:56" (3/3) ... [2020-04-17 14:30:56,511 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longest-2.i [2020-04-17 14:30:56,523 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-17 14:30:56,523 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-17 14:30:56,529 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-17 14:30:56,530 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-17 14:30:56,553 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,553 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,554 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,554 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,554 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,555 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,555 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,555 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,556 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,556 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,556 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,557 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,557 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,557 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,558 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,558 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,558 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,558 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,559 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,559 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,559 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,560 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,560 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,561 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,561 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,561 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,561 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,562 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,565 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,566 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,566 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,566 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,567 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,567 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,573 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,573 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,574 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,574 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,574 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,574 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:56,587 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-17 14:30:56,603 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 14:30:56,603 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 14:30:56,604 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 14:30:56,604 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 14:30:56,604 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 14:30:56,604 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 14:30:56,604 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 14:30:56,604 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 14:30:56,617 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-04-17 14:30:56,619 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-04-17 14:30:56,654 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-04-17 14:30:56,655 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 14:30:56,660 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-04-17 14:30:56,663 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-04-17 14:30:56,683 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-04-17 14:30:56,683 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 14:30:56,684 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-04-17 14:30:56,686 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-04-17 14:30:56,687 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 14:30:57,915 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-04-17 14:30:58,199 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-04-17 14:30:58,199 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-04-17 14:30:58,203 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-04-17 14:30:58,214 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-04-17 14:30:58,216 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-17 14:30:58,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-17 14:30:58,222 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:58,223 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-04-17 14:30:58,223 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:58,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:58,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-04-17 14:30:58,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:58,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540439431] [2020-04-17 14:30:58,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:58,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:58,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:30:58,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540439431] [2020-04-17 14:30:58,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 14:30:58,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 14:30:58,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278014555] [2020-04-17 14:30:58,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 14:30:58,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:58,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 14:30:58,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-17 14:30:58,449 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-04-17 14:30:58,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:58,534 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-04-17 14:30:58,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 14:30:58,536 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-04-17 14:30:58,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:58,549 INFO L225 Difference]: With dead ends: 75 [2020-04-17 14:30:58,549 INFO L226 Difference]: Without dead ends: 42 [2020-04-17 14:30:58,551 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-17 14:30:58,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-04-17 14:30:58,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-04-17 14:30:58,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-17 14:30:58,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-04-17 14:30:58,597 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-04-17 14:30:58,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:58,597 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-04-17 14:30:58,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 14:30:58,597 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-04-17 14:30:58,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 14:30:58,603 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:58,604 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:58,605 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:58,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:58,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-04-17 14:30:58,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:58,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419688457] [2020-04-17 14:30:58,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:58,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:58,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:30:58,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419688457] [2020-04-17 14:30:58,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 14:30:58,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 14:30:58,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570317947] [2020-04-17 14:30:58,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 14:30:58,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:58,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 14:30:58,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-17 14:30:58,725 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-04-17 14:30:58,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:58,774 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-04-17 14:30:58,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 14:30:58,776 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-17 14:30:58,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:58,777 INFO L225 Difference]: With dead ends: 56 [2020-04-17 14:30:58,777 INFO L226 Difference]: Without dead ends: 50 [2020-04-17 14:30:58,778 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-04-17 14:30:58,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-04-17 14:30:58,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-04-17 14:30:58,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-17 14:30:58,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-04-17 14:30:58,786 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-04-17 14:30:58,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:58,787 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-04-17 14:30:58,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 14:30:58,788 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-04-17 14:30:58,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 14:30:58,788 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:58,789 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:58,789 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:58,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:58,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-04-17 14:30:58,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:58,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402371864] [2020-04-17 14:30:58,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:58,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:30:58,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402371864] [2020-04-17 14:30:58,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 14:30:58,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 14:30:58,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721909615] [2020-04-17 14:30:58,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 14:30:58,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:58,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 14:30:58,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-04-17 14:30:58,878 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-04-17 14:30:58,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:58,951 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-04-17 14:30:58,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 14:30:58,951 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 14:30:58,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:58,953 INFO L225 Difference]: With dead ends: 78 [2020-04-17 14:30:58,953 INFO L226 Difference]: Without dead ends: 71 [2020-04-17 14:30:58,954 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-04-17 14:30:58,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-04-17 14:30:58,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-04-17 14:30:58,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 14:30:58,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-04-17 14:30:58,963 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-04-17 14:30:58,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:58,963 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-04-17 14:30:58,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 14:30:58,963 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-04-17 14:30:58,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 14:30:58,964 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:58,964 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:58,965 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:58,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:58,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-04-17 14:30:58,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:58,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525085968] [2020-04-17 14:30:58,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:58,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:59,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:30:59,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525085968] [2020-04-17 14:30:59,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 14:30:59,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 14:30:59,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442354918] [2020-04-17 14:30:59,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 14:30:59,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:59,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 14:30:59,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-04-17 14:30:59,032 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-04-17 14:30:59,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:59,107 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-04-17 14:30:59,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 14:30:59,108 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 14:30:59,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:59,109 INFO L225 Difference]: With dead ends: 54 [2020-04-17 14:30:59,109 INFO L226 Difference]: Without dead ends: 43 [2020-04-17 14:30:59,110 INFO L678 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 [2020-04-17 14:30:59,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-04-17 14:30:59,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-04-17 14:30:59,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-04-17 14:30:59,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-04-17 14:30:59,116 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-04-17 14:30:59,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:59,116 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-04-17 14:30:59,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 14:30:59,116 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-04-17 14:30:59,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 14:30:59,117 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:59,117 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:59,117 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:59,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:59,118 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-04-17 14:30:59,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:59,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324996590] [2020-04-17 14:30:59,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:59,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:59,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:30:59,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324996590] [2020-04-17 14:30:59,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 14:30:59,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 14:30:59,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915590735] [2020-04-17 14:30:59,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 14:30:59,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:59,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 14:30:59,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-04-17 14:30:59,180 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-04-17 14:30:59,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:59,261 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-04-17 14:30:59,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 14:30:59,263 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 14:30:59,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:59,264 INFO L225 Difference]: With dead ends: 57 [2020-04-17 14:30:59,264 INFO L226 Difference]: Without dead ends: 51 [2020-04-17 14:30:59,265 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-04-17 14:30:59,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-04-17 14:30:59,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-04-17 14:30:59,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-04-17 14:30:59,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-04-17 14:30:59,272 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-04-17 14:30:59,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:59,272 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-04-17 14:30:59,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 14:30:59,273 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-04-17 14:30:59,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 14:30:59,273 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:59,273 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:59,274 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:59,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:59,274 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-04-17 14:30:59,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:59,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451310555] [2020-04-17 14:30:59,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:59,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:59,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:30:59,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451310555] [2020-04-17 14:30:59,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679195989] [2020-04-17 14:30:59,364 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:59,418 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:30:59,419 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:30:59,421 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 14:30:59,426 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:30:59,461 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:59,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:30:59,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:30:59,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-04-17 14:30:59,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075555435] [2020-04-17 14:30:59,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 14:30:59,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:59,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 14:30:59,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-04-17 14:30:59,478 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-04-17 14:30:59,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:59,601 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-04-17 14:30:59,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 14:30:59,602 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-04-17 14:30:59,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:59,602 INFO L225 Difference]: With dead ends: 48 [2020-04-17 14:30:59,603 INFO L226 Difference]: Without dead ends: 43 [2020-04-17 14:30:59,603 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:30:59,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-04-17 14:30:59,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-04-17 14:30:59,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-04-17 14:30:59,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-04-17 14:30:59,607 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-04-17 14:30:59,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:59,608 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-04-17 14:30:59,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 14:30:59,608 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-04-17 14:30:59,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 14:30:59,609 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:59,609 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:59,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:59,810 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:59,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:59,811 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-04-17 14:30:59,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:59,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204965809] [2020-04-17 14:30:59,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:59,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:59,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:30:59,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204965809] [2020-04-17 14:30:59,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204759041] [2020-04-17 14:30:59,921 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:59,992 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:30:59,992 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:30:59,994 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 14:30:59,996 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:00,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:00,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:00,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-04-17 14:31:00,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325160532] [2020-04-17 14:31:00,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 14:31:00,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:00,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 14:31:00,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 14:31:00,015 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-04-17 14:31:00,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:00,099 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-04-17 14:31:00,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 14:31:00,099 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-04-17 14:31:00,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:00,100 INFO L225 Difference]: With dead ends: 54 [2020-04-17 14:31:00,100 INFO L226 Difference]: Without dead ends: 48 [2020-04-17 14:31:00,101 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-04-17 14:31:00,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-04-17 14:31:00,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-04-17 14:31:00,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-17 14:31:00,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-04-17 14:31:00,106 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-04-17 14:31:00,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:00,106 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-04-17 14:31:00,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 14:31:00,106 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-04-17 14:31:00,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 14:31:00,107 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:00,107 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:00,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:00,317 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:00,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:00,318 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-04-17 14:31:00,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:00,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716401144] [2020-04-17 14:31:00,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:00,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:00,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:00,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716401144] [2020-04-17 14:31:00,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283951857] [2020-04-17 14:31:00,408 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:00,471 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 14:31:00,472 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:00,473 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 14:31:00,474 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:00,500 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:00,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:00,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:00,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-04-17 14:31:00,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60918548] [2020-04-17 14:31:00,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 14:31:00,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:00,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 14:31:00,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-04-17 14:31:00,517 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-04-17 14:31:00,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:00,636 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-04-17 14:31:00,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 14:31:00,636 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-04-17 14:31:00,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:00,637 INFO L225 Difference]: With dead ends: 58 [2020-04-17 14:31:00,637 INFO L226 Difference]: Without dead ends: 52 [2020-04-17 14:31:00,637 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-04-17 14:31:00,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-04-17 14:31:00,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-04-17 14:31:00,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-04-17 14:31:00,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-04-17 14:31:00,642 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-04-17 14:31:00,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:00,642 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-04-17 14:31:00,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 14:31:00,643 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-04-17 14:31:00,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 14:31:00,643 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:00,643 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:00,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:00,852 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:00,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:00,852 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-04-17 14:31:00,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:00,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321337317] [2020-04-17 14:31:00,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:00,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:00,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:00,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321337317] [2020-04-17 14:31:00,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118686937] [2020-04-17 14:31:00,936 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:00,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:00,996 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 14:31:01,006 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:01,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:01,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:01,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-04-17 14:31:01,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107547250] [2020-04-17 14:31:01,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 14:31:01,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:01,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 14:31:01,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-04-17 14:31:01,027 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-04-17 14:31:01,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:01,181 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-04-17 14:31:01,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 14:31:01,183 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-04-17 14:31:01,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:01,184 INFO L225 Difference]: With dead ends: 78 [2020-04-17 14:31:01,184 INFO L226 Difference]: Without dead ends: 72 [2020-04-17 14:31:01,184 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:31:01,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-04-17 14:31:01,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-04-17 14:31:01,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 14:31:01,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-04-17 14:31:01,196 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-04-17 14:31:01,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:01,196 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-04-17 14:31:01,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 14:31:01,196 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-04-17 14:31:01,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 14:31:01,197 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:01,197 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:01,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:01,402 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:01,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:01,402 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-04-17 14:31:01,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:01,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6225063] [2020-04-17 14:31:01,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:01,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:01,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:01,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6225063] [2020-04-17 14:31:01,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807169145] [2020-04-17 14:31:01,485 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:01,544 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:31:01,545 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:01,546 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 14:31:01,547 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:01,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:01,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:01,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-04-17 14:31:01,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111045553] [2020-04-17 14:31:01,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 14:31:01,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:01,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 14:31:01,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-04-17 14:31:01,574 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-04-17 14:31:01,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:01,756 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-04-17 14:31:01,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 14:31:01,756 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-04-17 14:31:01,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:01,757 INFO L225 Difference]: With dead ends: 62 [2020-04-17 14:31:01,757 INFO L226 Difference]: Without dead ends: 54 [2020-04-17 14:31:01,758 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:31:01,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-17 14:31:01,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-04-17 14:31:01,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-04-17 14:31:01,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-04-17 14:31:01,762 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-04-17 14:31:01,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:01,762 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-04-17 14:31:01,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 14:31:01,763 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-04-17 14:31:01,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:31:01,763 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:01,763 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:01,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:01,965 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:01,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:01,965 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-04-17 14:31:01,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:01,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132999332] [2020-04-17 14:31:01,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:01,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:02,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:02,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132999332] [2020-04-17 14:31:02,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276250698] [2020-04-17 14:31:02,032 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:02,082 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 14:31:02,082 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:02,083 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 14:31:02,084 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:02,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:02,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:02,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-17 14:31:02,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455343005] [2020-04-17 14:31:02,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 14:31:02,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:02,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 14:31:02,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-04-17 14:31:02,097 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-04-17 14:31:02,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:02,204 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-04-17 14:31:02,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 14:31:02,205 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-04-17 14:31:02,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:02,205 INFO L225 Difference]: With dead ends: 64 [2020-04-17 14:31:02,206 INFO L226 Difference]: Without dead ends: 58 [2020-04-17 14:31:02,206 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:31:02,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-04-17 14:31:02,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-04-17 14:31:02,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-04-17 14:31:02,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-04-17 14:31:02,213 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-04-17 14:31:02,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:02,213 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-04-17 14:31:02,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 14:31:02,213 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-04-17 14:31:02,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:31:02,214 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:02,214 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:02,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:02,423 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:02,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:02,424 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-04-17 14:31:02,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:02,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482546233] [2020-04-17 14:31:02,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:02,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:02,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:02,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482546233] [2020-04-17 14:31:02,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334233085] [2020-04-17 14:31:02,513 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:02,586 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:31:02,586 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:02,587 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 14:31:02,589 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:02,610 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:02,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:02,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:02,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-04-17 14:31:02,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191848919] [2020-04-17 14:31:02,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 14:31:02,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:02,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 14:31:02,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-04-17 14:31:02,626 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-04-17 14:31:02,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:02,812 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-04-17 14:31:02,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 14:31:02,812 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-04-17 14:31:02,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:02,813 INFO L225 Difference]: With dead ends: 61 [2020-04-17 14:31:02,813 INFO L226 Difference]: Without dead ends: 55 [2020-04-17 14:31:02,813 INFO L678 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 [2020-04-17 14:31:02,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-04-17 14:31:02,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-04-17 14:31:02,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-04-17 14:31:02,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-04-17 14:31:02,817 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-04-17 14:31:02,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:02,823 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-04-17 14:31:02,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 14:31:02,823 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-04-17 14:31:02,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:31:02,824 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:02,824 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:03,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:03,030 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:03,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:03,030 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-04-17 14:31:03,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:03,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135124899] [2020-04-17 14:31:03,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:03,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:03,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:03,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135124899] [2020-04-17 14:31:03,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254328008] [2020-04-17 14:31:03,084 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:03,130 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:31:03,131 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:03,132 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 14:31:03,133 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:03,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:03,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:03,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-17 14:31:03,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127038879] [2020-04-17 14:31:03,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 14:31:03,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:03,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 14:31:03,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-04-17 14:31:03,160 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-04-17 14:31:03,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:03,307 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-04-17 14:31:03,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 14:31:03,308 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-04-17 14:31:03,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:03,309 INFO L225 Difference]: With dead ends: 77 [2020-04-17 14:31:03,309 INFO L226 Difference]: Without dead ends: 71 [2020-04-17 14:31:03,309 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:31:03,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-04-17 14:31:03,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-04-17 14:31:03,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-04-17 14:31:03,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-04-17 14:31:03,314 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-04-17 14:31:03,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:03,314 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-04-17 14:31:03,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 14:31:03,314 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-04-17 14:31:03,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:31:03,315 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:03,315 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:03,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:03,526 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:03,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:03,527 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-04-17 14:31:03,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:03,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31922463] [2020-04-17 14:31:03,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:03,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:03,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:03,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31922463] [2020-04-17 14:31:03,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851933580] [2020-04-17 14:31:03,580 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:03,625 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 14:31:03,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:03,626 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:31:03,627 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:03,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:03,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:03,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-04-17 14:31:03,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693134826] [2020-04-17 14:31:03,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 14:31:03,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:03,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 14:31:03,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-04-17 14:31:03,652 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-04-17 14:31:03,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:03,841 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-04-17 14:31:03,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 14:31:03,842 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-04-17 14:31:03,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:03,842 INFO L225 Difference]: With dead ends: 56 [2020-04-17 14:31:03,843 INFO L226 Difference]: Without dead ends: 48 [2020-04-17 14:31:03,843 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-04-17 14:31:03,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-04-17 14:31:03,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2020-04-17 14:31:03,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-04-17 14:31:03,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-04-17 14:31:03,846 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-04-17 14:31:03,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:03,846 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-04-17 14:31:03,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 14:31:03,846 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-04-17 14:31:03,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:31:03,847 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:03,847 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:04,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:04,048 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:04,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:04,049 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-04-17 14:31:04,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:04,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571497645] [2020-04-17 14:31:04,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:04,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:04,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:04,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571497645] [2020-04-17 14:31:04,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494917294] [2020-04-17 14:31:04,106 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:04,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:04,152 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 14:31:04,153 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:04,166 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:04,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:04,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:04,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-04-17 14:31:04,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607084869] [2020-04-17 14:31:04,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 14:31:04,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:04,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 14:31:04,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-04-17 14:31:04,176 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-04-17 14:31:04,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:04,363 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-04-17 14:31:04,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 14:31:04,364 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-04-17 14:31:04,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:04,365 INFO L225 Difference]: With dead ends: 60 [2020-04-17 14:31:04,365 INFO L226 Difference]: Without dead ends: 55 [2020-04-17 14:31:04,366 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:31:04,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-04-17 14:31:04,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-04-17 14:31:04,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 14:31:04,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-04-17 14:31:04,370 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-04-17 14:31:04,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:04,370 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-04-17 14:31:04,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 14:31:04,371 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-04-17 14:31:04,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:31:04,371 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:04,371 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:04,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:04,576 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:04,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:04,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-04-17 14:31:04,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:04,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066682515] [2020-04-17 14:31:04,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:04,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:04,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:04,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066682515] [2020-04-17 14:31:04,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153342412] [2020-04-17 14:31:04,645 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:04,697 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:31:04,698 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:04,698 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:31:04,702 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:04,724 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:04,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:04,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:04,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-04-17 14:31:04,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583259183] [2020-04-17 14:31:04,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 14:31:04,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:04,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 14:31:04,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-04-17 14:31:04,738 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-04-17 14:31:04,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:04,940 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-04-17 14:31:04,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 14:31:04,941 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-04-17 14:31:04,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:04,942 INFO L225 Difference]: With dead ends: 54 [2020-04-17 14:31:04,942 INFO L226 Difference]: Without dead ends: 49 [2020-04-17 14:31:04,943 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:31:04,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-04-17 14:31:04,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-04-17 14:31:04,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-04-17 14:31:04,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-04-17 14:31:04,947 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-04-17 14:31:04,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:04,947 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-04-17 14:31:04,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 14:31:04,947 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-04-17 14:31:04,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:31:04,948 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:04,948 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:05,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:05,151 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:05,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:05,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-04-17 14:31:05,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:05,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356054174] [2020-04-17 14:31:05,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:05,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:05,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:05,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356054174] [2020-04-17 14:31:05,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308591457] [2020-04-17 14:31:05,232 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:05,290 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 14:31:05,290 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:05,291 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:31:05,292 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:05,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:05,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-04-17 14:31:05,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124903812] [2020-04-17 14:31:05,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 14:31:05,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:05,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 14:31:05,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-04-17 14:31:05,311 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-04-17 14:31:05,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:05,441 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-04-17 14:31:05,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 14:31:05,442 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-04-17 14:31:05,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:05,442 INFO L225 Difference]: With dead ends: 60 [2020-04-17 14:31:05,443 INFO L226 Difference]: Without dead ends: 54 [2020-04-17 14:31:05,443 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-04-17 14:31:05,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-17 14:31:05,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-04-17 14:31:05,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 14:31:05,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-04-17 14:31:05,448 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-04-17 14:31:05,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:05,449 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-04-17 14:31:05,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 14:31:05,449 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-04-17 14:31:05,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:31:05,450 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:05,450 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:05,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:05,657 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:05,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:05,658 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-04-17 14:31:05,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:05,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133836669] [2020-04-17 14:31:05,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:05,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:05,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:05,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133836669] [2020-04-17 14:31:05,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711743204] [2020-04-17 14:31:05,729 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:05,780 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:31:05,780 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:05,781 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:31:05,782 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:05,810 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:05,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:05,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:05,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-04-17 14:31:05,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006169686] [2020-04-17 14:31:05,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 14:31:05,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:05,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 14:31:05,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-04-17 14:31:05,818 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-04-17 14:31:05,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:05,956 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-04-17 14:31:05,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 14:31:05,957 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-04-17 14:31:05,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:05,957 INFO L225 Difference]: With dead ends: 66 [2020-04-17 14:31:05,957 INFO L226 Difference]: Without dead ends: 60 [2020-04-17 14:31:05,958 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-04-17 14:31:05,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-04-17 14:31:05,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-04-17 14:31:05,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-04-17 14:31:05,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-04-17 14:31:05,960 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-04-17 14:31:05,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:05,961 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-04-17 14:31:05,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 14:31:05,961 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-04-17 14:31:05,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:31:05,961 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:05,961 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:06,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:06,162 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:06,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:06,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-04-17 14:31:06,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:06,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539904577] [2020-04-17 14:31:06,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:06,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:06,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:06,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539904577] [2020-04-17 14:31:06,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704628750] [2020-04-17 14:31:06,225 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:06,280 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 14:31:06,281 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:06,282 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:31:06,283 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:06,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:06,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:06,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-04-17 14:31:06,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528552213] [2020-04-17 14:31:06,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 14:31:06,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:06,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 14:31:06,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-04-17 14:31:06,300 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-04-17 14:31:06,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:06,450 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-04-17 14:31:06,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 14:31:06,451 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-04-17 14:31:06,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:06,452 INFO L225 Difference]: With dead ends: 67 [2020-04-17 14:31:06,452 INFO L226 Difference]: Without dead ends: 61 [2020-04-17 14:31:06,452 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:31:06,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-04-17 14:31:06,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-04-17 14:31:06,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-04-17 14:31:06,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-04-17 14:31:06,455 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-04-17 14:31:06,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:06,455 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-04-17 14:31:06,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 14:31:06,455 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-04-17 14:31:06,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:31:06,456 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:06,456 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:06,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:06,659 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:06,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:06,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-04-17 14:31:06,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:06,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256422009] [2020-04-17 14:31:06,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:06,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:06,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:06,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256422009] [2020-04-17 14:31:06,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483783597] [2020-04-17 14:31:06,748 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:06,823 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 14:31:06,823 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:06,824 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:31:06,825 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:06,841 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:06,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:06,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:06,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-04-17 14:31:06,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455272641] [2020-04-17 14:31:06,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 14:31:06,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:06,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 14:31:06,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-04-17 14:31:06,852 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-04-17 14:31:07,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:07,035 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-04-17 14:31:07,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 14:31:07,036 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-04-17 14:31:07,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:07,036 INFO L225 Difference]: With dead ends: 69 [2020-04-17 14:31:07,037 INFO L226 Difference]: Without dead ends: 63 [2020-04-17 14:31:07,037 INFO L678 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 [2020-04-17 14:31:07,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-04-17 14:31:07,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-04-17 14:31:07,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 14:31:07,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-04-17 14:31:07,039 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-04-17 14:31:07,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:07,040 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-04-17 14:31:07,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 14:31:07,040 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-04-17 14:31:07,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:31:07,040 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:07,041 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:07,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:07,242 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:07,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:07,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-04-17 14:31:07,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:07,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591935481] [2020-04-17 14:31:07,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:07,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:07,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:07,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591935481] [2020-04-17 14:31:07,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670725137] [2020-04-17 14:31:07,302 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:07,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:07,352 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:31:07,353 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:07,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:07,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:07,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-04-17 14:31:07,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187204061] [2020-04-17 14:31:07,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 14:31:07,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:07,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 14:31:07,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-04-17 14:31:07,363 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-04-17 14:31:07,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:07,567 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-04-17 14:31:07,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 14:31:07,569 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-04-17 14:31:07,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:07,570 INFO L225 Difference]: With dead ends: 88 [2020-04-17 14:31:07,571 INFO L226 Difference]: Without dead ends: 82 [2020-04-17 14:31:07,571 INFO L678 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 [2020-04-17 14:31:07,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-04-17 14:31:07,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-04-17 14:31:07,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-04-17 14:31:07,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-04-17 14:31:07,575 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-04-17 14:31:07,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:07,575 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-04-17 14:31:07,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 14:31:07,575 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-04-17 14:31:07,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:31:07,576 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:07,576 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:07,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:07,779 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:07,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:07,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-04-17 14:31:07,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:07,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002276916] [2020-04-17 14:31:07,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:07,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:07,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:07,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002276916] [2020-04-17 14:31:07,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449592090] [2020-04-17 14:31:07,845 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:07,893 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:31:07,893 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:07,894 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:31:07,895 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:07,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:07,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:07,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-04-17 14:31:07,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799219494] [2020-04-17 14:31:07,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 14:31:07,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:07,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 14:31:07,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-04-17 14:31:07,925 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-04-17 14:31:08,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:08,180 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-04-17 14:31:08,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 14:31:08,181 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-04-17 14:31:08,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:08,182 INFO L225 Difference]: With dead ends: 69 [2020-04-17 14:31:08,182 INFO L226 Difference]: Without dead ends: 61 [2020-04-17 14:31:08,182 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:31:08,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-04-17 14:31:08,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-04-17 14:31:08,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-04-17 14:31:08,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-04-17 14:31:08,186 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-04-17 14:31:08,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:08,186 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-04-17 14:31:08,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 14:31:08,186 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-04-17 14:31:08,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:31:08,187 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:08,187 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:08,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:08,391 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:08,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:08,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-04-17 14:31:08,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:08,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125397586] [2020-04-17 14:31:08,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:08,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:08,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:08,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125397586] [2020-04-17 14:31:08,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324945512] [2020-04-17 14:31:08,473 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:08,544 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 14:31:08,545 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:08,545 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:31:08,547 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:08,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:08,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:08,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-17 14:31:08,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87092837] [2020-04-17 14:31:08,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 14:31:08,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:08,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 14:31:08,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-04-17 14:31:08,559 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-04-17 14:31:08,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:08,696 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-04-17 14:31:08,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 14:31:08,697 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-04-17 14:31:08,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:08,698 INFO L225 Difference]: With dead ends: 74 [2020-04-17 14:31:08,698 INFO L226 Difference]: Without dead ends: 68 [2020-04-17 14:31:08,699 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:31:08,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-04-17 14:31:08,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-04-17 14:31:08,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-04-17 14:31:08,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-04-17 14:31:08,702 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-04-17 14:31:08,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:08,702 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-04-17 14:31:08,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 14:31:08,703 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-04-17 14:31:08,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:31:08,703 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:08,703 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:08,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:08,907 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:08,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:08,908 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-04-17 14:31:08,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:08,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901418593] [2020-04-17 14:31:08,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:08,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:08,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:08,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901418593] [2020-04-17 14:31:08,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820188707] [2020-04-17 14:31:08,980 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:09,032 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:31:09,032 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:09,033 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:31:09,034 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:09,091 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:09,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:09,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:09,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-17 14:31:09,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065335315] [2020-04-17 14:31:09,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:31:09,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:09,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:31:09,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:31:09,121 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-04-17 14:31:09,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:09,432 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-04-17 14:31:09,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 14:31:09,432 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-04-17 14:31:09,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:09,433 INFO L225 Difference]: With dead ends: 71 [2020-04-17 14:31:09,433 INFO L226 Difference]: Without dead ends: 65 [2020-04-17 14:31:09,433 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:31:09,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-04-17 14:31:09,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-04-17 14:31:09,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 14:31:09,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-04-17 14:31:09,436 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-04-17 14:31:09,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:09,436 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-04-17 14:31:09,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:31:09,436 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-04-17 14:31:09,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:31:09,437 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:09,437 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:09,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:09,642 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:09,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:09,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-04-17 14:31:09,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:09,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825529164] [2020-04-17 14:31:09,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:09,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:09,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825529164] [2020-04-17 14:31:09,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507107735] [2020-04-17 14:31:09,716 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:09,760 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 14:31:09,760 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:09,761 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:31:09,762 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:09,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:09,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:09,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-17 14:31:09,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818110879] [2020-04-17 14:31:09,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 14:31:09,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:09,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 14:31:09,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-04-17 14:31:09,782 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-04-17 14:31:09,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:09,960 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-04-17 14:31:09,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 14:31:09,961 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-04-17 14:31:09,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:09,962 INFO L225 Difference]: With dead ends: 68 [2020-04-17 14:31:09,962 INFO L226 Difference]: Without dead ends: 62 [2020-04-17 14:31:09,962 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:31:09,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-04-17 14:31:09,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-04-17 14:31:09,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-04-17 14:31:09,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-04-17 14:31:09,965 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-04-17 14:31:09,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:09,965 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-04-17 14:31:09,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 14:31:09,965 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-04-17 14:31:09,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:31:09,966 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:09,966 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:10,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:10,172 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:10,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:10,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-04-17 14:31:10,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:10,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223798824] [2020-04-17 14:31:10,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:10,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:10,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:10,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223798824] [2020-04-17 14:31:10,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576962235] [2020-04-17 14:31:10,239 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:10,280 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 14:31:10,280 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:10,280 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:31:10,282 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:10,301 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:10,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:10,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:10,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-17 14:31:10,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204986199] [2020-04-17 14:31:10,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:31:10,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:10,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:31:10,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:31:10,311 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-04-17 14:31:10,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:10,604 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-04-17 14:31:10,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 14:31:10,604 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-04-17 14:31:10,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:10,605 INFO L225 Difference]: With dead ends: 67 [2020-04-17 14:31:10,605 INFO L226 Difference]: Without dead ends: 61 [2020-04-17 14:31:10,606 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:31:10,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-04-17 14:31:10,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-04-17 14:31:10,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 14:31:10,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-04-17 14:31:10,609 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-04-17 14:31:10,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:10,610 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-04-17 14:31:10,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:31:10,610 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-04-17 14:31:10,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:31:10,610 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:10,611 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:10,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:10,814 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:10,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:10,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-04-17 14:31:10,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:10,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059049656] [2020-04-17 14:31:10,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:10,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:10,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:10,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059049656] [2020-04-17 14:31:10,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018837932] [2020-04-17 14:31:10,871 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:10,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:10,919 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:31:10,923 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:10,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:10,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:10,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-17 14:31:10,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135012063] [2020-04-17 14:31:10,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 14:31:10,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:10,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 14:31:10,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-04-17 14:31:10,935 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-04-17 14:31:11,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:11,147 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-04-17 14:31:11,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 14:31:11,152 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-04-17 14:31:11,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:11,153 INFO L225 Difference]: With dead ends: 83 [2020-04-17 14:31:11,153 INFO L226 Difference]: Without dead ends: 77 [2020-04-17 14:31:11,154 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:31:11,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-17 14:31:11,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-04-17 14:31:11,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-04-17 14:31:11,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-04-17 14:31:11,158 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-04-17 14:31:11,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:11,158 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-04-17 14:31:11,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 14:31:11,159 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-04-17 14:31:11,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:31:11,159 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:11,159 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:11,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:11,363 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:11,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:11,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-04-17 14:31:11,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:11,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119153280] [2020-04-17 14:31:11,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:11,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:11,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:11,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119153280] [2020-04-17 14:31:11,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215092985] [2020-04-17 14:31:11,425 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:11,466 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:31:11,466 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:11,466 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:31:11,467 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:11,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:11,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:11,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-17 14:31:11,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024948645] [2020-04-17 14:31:11,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:31:11,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:11,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:31:11,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:31:11,495 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-04-17 14:31:11,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:11,777 INFO L93 Difference]: Finished difference Result 62 states and 149 transitions. [2020-04-17 14:31:11,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 14:31:11,778 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-04-17 14:31:11,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:11,778 INFO L225 Difference]: With dead ends: 62 [2020-04-17 14:31:11,778 INFO L226 Difference]: Without dead ends: 54 [2020-04-17 14:31:11,779 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:31:11,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-17 14:31:11,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-04-17 14:31:11,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-04-17 14:31:11,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-04-17 14:31:11,783 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-04-17 14:31:11,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:11,783 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-04-17 14:31:11,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:31:11,783 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-04-17 14:31:11,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:31:11,784 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:11,784 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:11,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:11,988 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:11,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:11,989 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-04-17 14:31:11,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:11,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555207851] [2020-04-17 14:31:11,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:11,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:12,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:12,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555207851] [2020-04-17 14:31:12,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519892491] [2020-04-17 14:31:12,050 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:12,095 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 14:31:12,095 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:12,096 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:31:12,097 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:12,136 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:12,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:12,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:12,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-17 14:31:12,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386095079] [2020-04-17 14:31:12,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:31:12,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:12,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:31:12,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:31:12,146 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-04-17 14:31:12,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:12,434 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-04-17 14:31:12,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 14:31:12,434 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-04-17 14:31:12,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:12,435 INFO L225 Difference]: With dead ends: 68 [2020-04-17 14:31:12,435 INFO L226 Difference]: Without dead ends: 63 [2020-04-17 14:31:12,436 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:31:12,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-04-17 14:31:12,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-04-17 14:31:12,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-04-17 14:31:12,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-04-17 14:31:12,438 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-04-17 14:31:12,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:12,438 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-04-17 14:31:12,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:31:12,438 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-04-17 14:31:12,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 14:31:12,439 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:12,439 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:12,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:12,642 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:12,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:12,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-04-17 14:31:12,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:12,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348134509] [2020-04-17 14:31:12,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:12,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:12,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:12,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348134509] [2020-04-17 14:31:12,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336682595] [2020-04-17 14:31:12,718 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:12,765 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:31:12,765 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:12,766 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:31:12,767 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:12,793 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:12,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:12,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:12,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 14:31:12,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124832097] [2020-04-17 14:31:12,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 14:31:12,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:12,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 14:31:12,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-04-17 14:31:12,806 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-04-17 14:31:13,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:13,081 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-04-17 14:31:13,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 14:31:13,082 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 14:31:13,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:13,083 INFO L225 Difference]: With dead ends: 60 [2020-04-17 14:31:13,083 INFO L226 Difference]: Without dead ends: 55 [2020-04-17 14:31:13,084 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:31:13,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-04-17 14:31:13,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-04-17 14:31:13,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-17 14:31:13,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-04-17 14:31:13,086 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-04-17 14:31:13,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:13,087 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-04-17 14:31:13,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 14:31:13,087 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-04-17 14:31:13,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 14:31:13,087 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:13,087 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:13,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:13,291 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:13,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:13,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-04-17 14:31:13,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:13,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325937742] [2020-04-17 14:31:13,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:13,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:13,383 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:13,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325937742] [2020-04-17 14:31:13,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431001891] [2020-04-17 14:31:13,383 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:13,433 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-17 14:31:13,433 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:13,434 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:31:13,435 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:13,445 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:13,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:13,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-17 14:31:13,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861884331] [2020-04-17 14:31:13,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:31:13,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:13,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:31:13,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:31:13,446 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-04-17 14:31:13,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:13,571 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-04-17 14:31:13,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 14:31:13,572 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-04-17 14:31:13,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:13,573 INFO L225 Difference]: With dead ends: 66 [2020-04-17 14:31:13,573 INFO L226 Difference]: Without dead ends: 60 [2020-04-17 14:31:13,574 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:31:13,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-04-17 14:31:13,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-04-17 14:31:13,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 14:31:13,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-04-17 14:31:13,577 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-04-17 14:31:13,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:13,577 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-04-17 14:31:13,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:31:13,577 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-04-17 14:31:13,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 14:31:13,578 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:13,578 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:13,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:13,782 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:13,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:13,782 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-04-17 14:31:13,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:13,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922169656] [2020-04-17 14:31:13,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:13,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:13,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:13,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922169656] [2020-04-17 14:31:13,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320934865] [2020-04-17 14:31:13,915 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:13,988 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 14:31:13,988 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:13,990 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:31:13,991 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:14,011 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:14,024 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:14,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:14,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 14:31:14,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911399711] [2020-04-17 14:31:14,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 14:31:14,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:14,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 14:31:14,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-04-17 14:31:14,028 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-04-17 14:31:14,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:14,274 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-04-17 14:31:14,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 14:31:14,275 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 14:31:14,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:14,276 INFO L225 Difference]: With dead ends: 74 [2020-04-17 14:31:14,276 INFO L226 Difference]: Without dead ends: 68 [2020-04-17 14:31:14,277 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:31:14,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-04-17 14:31:14,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-04-17 14:31:14,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-04-17 14:31:14,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-04-17 14:31:14,281 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-04-17 14:31:14,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:14,281 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-04-17 14:31:14,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 14:31:14,282 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-04-17 14:31:14,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 14:31:14,282 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:14,282 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:14,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:14,487 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:14,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:14,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-04-17 14:31:14,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:14,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066770668] [2020-04-17 14:31:14,488 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:14,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:14,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:14,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066770668] [2020-04-17 14:31:14,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926753695] [2020-04-17 14:31:14,572 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:14,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:14,643 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:31:14,644 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:14,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:14,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:14,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-17 14:31:14,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705166915] [2020-04-17 14:31:14,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:31:14,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:14,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:31:14,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:31:14,658 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-04-17 14:31:14,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:14,855 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-04-17 14:31:14,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 14:31:14,855 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-04-17 14:31:14,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:14,856 INFO L225 Difference]: With dead ends: 75 [2020-04-17 14:31:14,857 INFO L226 Difference]: Without dead ends: 69 [2020-04-17 14:31:14,857 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:31:14,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-04-17 14:31:14,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-04-17 14:31:14,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-04-17 14:31:14,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-04-17 14:31:14,865 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-04-17 14:31:14,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:14,866 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-04-17 14:31:14,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:31:14,866 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-04-17 14:31:14,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 14:31:14,866 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:14,866 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:15,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:15,067 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:15,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:15,068 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-04-17 14:31:15,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:15,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143584593] [2020-04-17 14:31:15,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:15,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:15,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:15,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143584593] [2020-04-17 14:31:15,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802541803] [2020-04-17 14:31:15,147 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:15,194 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:31:15,195 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:15,195 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:31:15,196 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:15,209 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:15,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:15,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:15,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 14:31:15,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679705418] [2020-04-17 14:31:15,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 14:31:15,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:15,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 14:31:15,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-04-17 14:31:15,217 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-04-17 14:31:15,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:15,473 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-04-17 14:31:15,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 14:31:15,473 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 14:31:15,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:15,474 INFO L225 Difference]: With dead ends: 79 [2020-04-17 14:31:15,474 INFO L226 Difference]: Without dead ends: 73 [2020-04-17 14:31:15,474 INFO L678 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 [2020-04-17 14:31:15,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-04-17 14:31:15,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-04-17 14:31:15,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 14:31:15,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-04-17 14:31:15,478 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-04-17 14:31:15,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:15,479 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-04-17 14:31:15,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 14:31:15,479 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-04-17 14:31:15,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 14:31:15,479 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:15,479 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:15,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:15,683 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:15,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:15,683 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-04-17 14:31:15,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:15,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349267646] [2020-04-17 14:31:15,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:15,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:15,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:15,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349267646] [2020-04-17 14:31:15,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167811847] [2020-04-17 14:31:15,795 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:15,866 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 14:31:15,866 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:15,867 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:31:15,875 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:15,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:15,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:15,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-17 14:31:15,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158329171] [2020-04-17 14:31:15,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:31:15,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:15,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:31:15,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:31:15,889 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-04-17 14:31:16,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:16,195 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-04-17 14:31:16,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 14:31:16,196 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-04-17 14:31:16,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:16,196 INFO L225 Difference]: With dead ends: 79 [2020-04-17 14:31:16,197 INFO L226 Difference]: Without dead ends: 73 [2020-04-17 14:31:16,197 INFO L678 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 [2020-04-17 14:31:16,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-04-17 14:31:16,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-04-17 14:31:16,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-04-17 14:31:16,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-04-17 14:31:16,200 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-04-17 14:31:16,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:16,200 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-04-17 14:31:16,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:31:16,200 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-04-17 14:31:16,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 14:31:16,200 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:16,201 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:16,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:16,404 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:16,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:16,405 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-04-17 14:31:16,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:16,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054200799] [2020-04-17 14:31:16,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:16,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:16,482 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:16,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054200799] [2020-04-17 14:31:16,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696745115] [2020-04-17 14:31:16,483 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:16,525 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:31:16,525 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:16,526 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:31:16,527 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:16,548 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:16,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:16,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:16,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 14:31:16,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357740218] [2020-04-17 14:31:16,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 14:31:16,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:16,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 14:31:16,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-04-17 14:31:16,560 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-04-17 14:31:16,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:16,868 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-04-17 14:31:16,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 14:31:16,869 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 14:31:16,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:16,869 INFO L225 Difference]: With dead ends: 76 [2020-04-17 14:31:16,869 INFO L226 Difference]: Without dead ends: 70 [2020-04-17 14:31:16,870 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:31:16,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-04-17 14:31:16,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-04-17 14:31:16,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-04-17 14:31:16,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-04-17 14:31:16,872 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-04-17 14:31:16,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:16,873 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-04-17 14:31:16,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 14:31:16,873 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-04-17 14:31:16,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 14:31:16,873 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:16,874 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:17,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:17,077 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:17,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:17,078 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-04-17 14:31:17,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:17,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282510292] [2020-04-17 14:31:17,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:17,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:17,139 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:17,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282510292] [2020-04-17 14:31:17,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780413198] [2020-04-17 14:31:17,140 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:17,190 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-17 14:31:17,190 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:17,191 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:31:17,191 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:17,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:17,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:17,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-17 14:31:17,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968240175] [2020-04-17 14:31:17,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:31:17,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:17,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:31:17,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:31:17,210 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-04-17 14:31:17,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:17,484 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-04-17 14:31:17,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 14:31:17,485 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-04-17 14:31:17,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:17,486 INFO L225 Difference]: With dead ends: 96 [2020-04-17 14:31:17,486 INFO L226 Difference]: Without dead ends: 90 [2020-04-17 14:31:17,486 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:31:17,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-04-17 14:31:17,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-04-17 14:31:17,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 14:31:17,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-04-17 14:31:17,490 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-04-17 14:31:17,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:17,490 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-04-17 14:31:17,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:31:17,491 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-04-17 14:31:17,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 14:31:17,491 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:17,491 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:17,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:17,694 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:17,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:17,695 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-04-17 14:31:17,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:17,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126716933] [2020-04-17 14:31:17,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:17,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:17,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:17,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126716933] [2020-04-17 14:31:17,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892260361] [2020-04-17 14:31:17,764 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:17,811 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 14:31:17,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:17,812 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 14:31:17,813 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:17,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:17,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:17,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 14:31:17,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330834566] [2020-04-17 14:31:17,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 14:31:17,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:17,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 14:31:17,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-04-17 14:31:17,844 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-04-17 14:31:18,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:18,195 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-04-17 14:31:18,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 14:31:18,195 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 14:31:18,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:18,196 INFO L225 Difference]: With dead ends: 77 [2020-04-17 14:31:18,196 INFO L226 Difference]: Without dead ends: 69 [2020-04-17 14:31:18,197 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-04-17 14:31:18,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-04-17 14:31:18,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-04-17 14:31:18,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-04-17 14:31:18,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-04-17 14:31:18,200 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-04-17 14:31:18,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:18,200 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-04-17 14:31:18,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 14:31:18,200 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-04-17 14:31:18,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 14:31:18,201 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:18,201 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:18,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:18,404 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:18,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:18,405 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-04-17 14:31:18,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:18,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168968165] [2020-04-17 14:31:18,406 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:18,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:18,497 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:18,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168968165] [2020-04-17 14:31:18,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285247336] [2020-04-17 14:31:18,498 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:18,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:18,549 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 14:31:18,550 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:18,556 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:18,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:18,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-17 14:31:18,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81084457] [2020-04-17 14:31:18,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 14:31:18,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:18,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 14:31:18,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-04-17 14:31:18,558 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-04-17 14:31:18,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:18,771 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-04-17 14:31:18,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 14:31:18,772 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-04-17 14:31:18,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:18,772 INFO L225 Difference]: With dead ends: 84 [2020-04-17 14:31:18,772 INFO L226 Difference]: Without dead ends: 78 [2020-04-17 14:31:18,773 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:31:18,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-04-17 14:31:18,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-04-17 14:31:18,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-17 14:31:18,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-04-17 14:31:18,775 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-04-17 14:31:18,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:18,776 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-04-17 14:31:18,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 14:31:18,776 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-04-17 14:31:18,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 14:31:18,776 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:18,776 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:18,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:18,980 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:18,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:18,981 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-04-17 14:31:18,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:18,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725254805] [2020-04-17 14:31:18,981 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:18,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:19,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:19,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725254805] [2020-04-17 14:31:19,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985610407] [2020-04-17 14:31:19,073 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:19,123 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:31:19,123 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:19,124 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 14:31:19,125 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:19,135 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:19,142 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:19,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:19,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 14:31:19,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928153653] [2020-04-17 14:31:19,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:31:19,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:19,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:31:19,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:31:19,143 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-04-17 14:31:19,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:19,408 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-04-17 14:31:19,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 14:31:19,408 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 14:31:19,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:19,409 INFO L225 Difference]: With dead ends: 81 [2020-04-17 14:31:19,409 INFO L226 Difference]: Without dead ends: 75 [2020-04-17 14:31:19,409 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:31:19,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-04-17 14:31:19,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-04-17 14:31:19,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-17 14:31:19,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-04-17 14:31:19,412 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-04-17 14:31:19,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:19,412 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-04-17 14:31:19,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:31:19,412 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-04-17 14:31:19,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 14:31:19,412 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:19,412 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:19,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:19,616 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:19,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:19,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-04-17 14:31:19,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:19,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891444822] [2020-04-17 14:31:19,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:19,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:19,709 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:19,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891444822] [2020-04-17 14:31:19,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512101099] [2020-04-17 14:31:19,710 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:19,757 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 14:31:19,758 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:19,758 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 14:31:19,759 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:19,769 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:19,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:19,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-17 14:31:19,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90991388] [2020-04-17 14:31:19,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 14:31:19,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:19,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 14:31:19,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-04-17 14:31:19,770 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-04-17 14:31:19,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:19,973 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-04-17 14:31:19,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 14:31:19,974 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-04-17 14:31:19,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:19,975 INFO L225 Difference]: With dead ends: 78 [2020-04-17 14:31:19,975 INFO L226 Difference]: Without dead ends: 72 [2020-04-17 14:31:19,976 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:31:19,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-04-17 14:31:19,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-04-17 14:31:19,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-17 14:31:19,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-04-17 14:31:19,980 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-04-17 14:31:19,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:19,980 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-04-17 14:31:19,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 14:31:19,980 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-04-17 14:31:19,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 14:31:19,981 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:19,981 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:20,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:20,184 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:20,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:20,185 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-04-17 14:31:20,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:20,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404815088] [2020-04-17 14:31:20,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:20,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:20,292 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:20,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404815088] [2020-04-17 14:31:20,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274999709] [2020-04-17 14:31:20,292 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:20,358 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:31:20,358 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:20,359 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 14:31:20,360 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:20,382 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:20,394 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:20,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:20,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 14:31:20,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451009436] [2020-04-17 14:31:20,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:31:20,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:20,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:31:20,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:31:20,397 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-04-17 14:31:20,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:20,740 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-04-17 14:31:20,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 14:31:20,741 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 14:31:20,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:20,742 INFO L225 Difference]: With dead ends: 77 [2020-04-17 14:31:20,742 INFO L226 Difference]: Without dead ends: 71 [2020-04-17 14:31:20,743 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:31:20,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-04-17 14:31:20,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-04-17 14:31:20,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-17 14:31:20,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-04-17 14:31:20,746 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-04-17 14:31:20,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:20,746 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-04-17 14:31:20,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:31:20,746 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-04-17 14:31:20,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 14:31:20,746 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:20,747 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:20,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:20,950 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:20,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:20,951 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-04-17 14:31:20,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:20,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299733328] [2020-04-17 14:31:20,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:20,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:21,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:21,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299733328] [2020-04-17 14:31:21,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122676619] [2020-04-17 14:31:21,039 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:21,083 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-17 14:31:21,083 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:21,084 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 14:31:21,084 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:21,099 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:21,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:21,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-17 14:31:21,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068474282] [2020-04-17 14:31:21,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 14:31:21,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:21,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 14:31:21,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-04-17 14:31:21,101 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-04-17 14:31:21,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:21,362 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-04-17 14:31:21,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 14:31:21,362 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-04-17 14:31:21,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:21,363 INFO L225 Difference]: With dead ends: 74 [2020-04-17 14:31:21,363 INFO L226 Difference]: Without dead ends: 68 [2020-04-17 14:31:21,364 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:31:21,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-04-17 14:31:21,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-04-17 14:31:21,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-17 14:31:21,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-04-17 14:31:21,367 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-04-17 14:31:21,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:21,367 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-04-17 14:31:21,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 14:31:21,367 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-04-17 14:31:21,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 14:31:21,368 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:21,368 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:21,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:21,571 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:21,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:21,572 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-04-17 14:31:21,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:21,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855378583] [2020-04-17 14:31:21,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:21,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:21,664 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:21,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855378583] [2020-04-17 14:31:21,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10939043] [2020-04-17 14:31:21,664 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:21,712 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 14:31:21,712 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:21,713 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 14:31:21,714 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:21,725 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:21,737 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:21,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:21,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 14:31:21,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21613703] [2020-04-17 14:31:21,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:31:21,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:21,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:31:21,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:31:21,739 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-04-17 14:31:22,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:22,114 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-04-17 14:31:22,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 14:31:22,114 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 14:31:22,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:22,115 INFO L225 Difference]: With dead ends: 73 [2020-04-17 14:31:22,116 INFO L226 Difference]: Without dead ends: 67 [2020-04-17 14:31:22,116 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-04-17 14:31:22,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-04-17 14:31:22,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-04-17 14:31:22,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-17 14:31:22,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-04-17 14:31:22,120 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-04-17 14:31:22,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:22,120 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-04-17 14:31:22,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:31:22,120 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-04-17 14:31:22,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 14:31:22,120 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:22,121 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:22,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:22,324 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:22,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:22,324 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-04-17 14:31:22,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:22,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065925766] [2020-04-17 14:31:22,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:22,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:22,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:22,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065925766] [2020-04-17 14:31:22,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931691129] [2020-04-17 14:31:22,415 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:22,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:22,484 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 14:31:22,485 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:22,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:22,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:22,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-17 14:31:22,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743429444] [2020-04-17 14:31:22,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 14:31:22,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:22,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 14:31:22,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-04-17 14:31:22,508 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-04-17 14:31:22,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:22,767 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-04-17 14:31:22,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 14:31:22,768 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-04-17 14:31:22,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:22,769 INFO L225 Difference]: With dead ends: 89 [2020-04-17 14:31:22,769 INFO L226 Difference]: Without dead ends: 83 [2020-04-17 14:31:22,769 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-04-17 14:31:22,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-04-17 14:31:22,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-04-17 14:31:22,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-04-17 14:31:22,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-04-17 14:31:22,773 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-04-17 14:31:22,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:22,774 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-04-17 14:31:22,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 14:31:22,774 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-04-17 14:31:22,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 14:31:22,774 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:22,774 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:22,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:22,978 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:22,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:22,979 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-04-17 14:31:22,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:22,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323164998] [2020-04-17 14:31:22,979 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:22,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:23,053 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:23,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323164998] [2020-04-17 14:31:23,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682424073] [2020-04-17 14:31:23,054 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:23,101 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:31:23,101 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:23,102 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 14:31:23,102 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:23,130 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:23,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:23,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:23,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 14:31:23,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750593649] [2020-04-17 14:31:23,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:31:23,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:23,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:31:23,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:31:23,168 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-04-17 14:31:23,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:23,554 INFO L93 Difference]: Finished difference Result 70 states and 169 transitions. [2020-04-17 14:31:23,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 14:31:23,555 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 14:31:23,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:23,555 INFO L225 Difference]: With dead ends: 70 [2020-04-17 14:31:23,556 INFO L226 Difference]: Without dead ends: 62 [2020-04-17 14:31:23,556 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-04-17 14:31:23,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-04-17 14:31:23,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-04-17 14:31:23,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-04-17 14:31:23,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-04-17 14:31:23,561 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-04-17 14:31:23,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:23,561 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-04-17 14:31:23,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:31:23,561 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-04-17 14:31:23,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 14:31:23,561 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:23,562 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:23,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:23,765 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:23,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:23,765 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-04-17 14:31:23,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:23,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159881729] [2020-04-17 14:31:23,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:23,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:23,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:23,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159881729] [2020-04-17 14:31:23,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781423991] [2020-04-17 14:31:23,843 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:23,890 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 14:31:23,890 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:23,891 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 14:31:23,892 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:23,916 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:23,925 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:23,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:23,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 14:31:23,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034986046] [2020-04-17 14:31:23,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:31:23,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:23,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:31:23,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:31:23,926 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-04-17 14:31:24,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:24,290 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-04-17 14:31:24,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 14:31:24,290 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 14:31:24,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:24,290 INFO L225 Difference]: With dead ends: 76 [2020-04-17 14:31:24,291 INFO L226 Difference]: Without dead ends: 71 [2020-04-17 14:31:24,291 INFO L678 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 [2020-04-17 14:31:24,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-04-17 14:31:24,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-04-17 14:31:24,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 14:31:24,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-04-17 14:31:24,293 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-04-17 14:31:24,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:24,293 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-04-17 14:31:24,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:31:24,293 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-04-17 14:31:24,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 14:31:24,294 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:24,294 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:24,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:24,497 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:24,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:24,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-04-17 14:31:24,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:24,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555178016] [2020-04-17 14:31:24,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:24,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:24,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:24,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555178016] [2020-04-17 14:31:24,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397273735] [2020-04-17 14:31:24,583 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:24,645 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:31:24,645 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:24,646 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 14:31:24,647 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:24,667 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:24,678 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:24,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:24,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 14:31:24,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494730751] [2020-04-17 14:31:24,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 14:31:24,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:24,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 14:31:24,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-04-17 14:31:24,679 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-04-17 14:31:25,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:25,048 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-04-17 14:31:25,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 14:31:25,048 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 14:31:25,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:25,049 INFO L225 Difference]: With dead ends: 66 [2020-04-17 14:31:25,049 INFO L226 Difference]: Without dead ends: 61 [2020-04-17 14:31:25,050 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-04-17 14:31:25,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-04-17 14:31:25,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-04-17 14:31:25,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 14:31:25,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-04-17 14:31:25,052 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-04-17 14:31:25,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:25,052 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-04-17 14:31:25,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 14:31:25,053 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-04-17 14:31:25,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 14:31:25,053 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:25,053 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:25,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:25,256 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:25,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:25,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-04-17 14:31:25,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:25,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969457503] [2020-04-17 14:31:25,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:25,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:25,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:25,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969457503] [2020-04-17 14:31:25,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930749758] [2020-04-17 14:31:25,365 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:25,408 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-04-17 14:31:25,408 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:25,409 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 14:31:25,410 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:25,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:25,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:25,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 14:31:25,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781809764] [2020-04-17 14:31:25,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:31:25,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:25,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:31:25,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:31:25,417 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-04-17 14:31:25,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:25,604 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-04-17 14:31:25,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 14:31:25,605 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 14:31:25,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:25,605 INFO L225 Difference]: With dead ends: 72 [2020-04-17 14:31:25,606 INFO L226 Difference]: Without dead ends: 66 [2020-04-17 14:31:25,606 INFO L678 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 [2020-04-17 14:31:25,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-04-17 14:31:25,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-04-17 14:31:25,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-04-17 14:31:25,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-04-17 14:31:25,609 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-04-17 14:31:25,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:25,610 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-04-17 14:31:25,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:31:25,610 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-04-17 14:31:25,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 14:31:25,610 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:25,610 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:25,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:25,814 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:25,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:25,814 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-04-17 14:31:25,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:25,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903619614] [2020-04-17 14:31:25,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:25,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:25,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:25,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903619614] [2020-04-17 14:31:25,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260746631] [2020-04-17 14:31:25,948 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:26,001 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-04-17 14:31:26,001 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:26,002 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 14:31:26,003 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:26,043 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:26,050 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:26,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:26,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 14:31:26,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235034602] [2020-04-17 14:31:26,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 14:31:26,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:26,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 14:31:26,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-04-17 14:31:26,051 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-04-17 14:31:26,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:26,228 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-04-17 14:31:26,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 14:31:26,229 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 14:31:26,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:26,230 INFO L225 Difference]: With dead ends: 82 [2020-04-17 14:31:26,230 INFO L226 Difference]: Without dead ends: 76 [2020-04-17 14:31:26,231 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:31:26,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-04-17 14:31:26,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-04-17 14:31:26,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-04-17 14:31:26,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-04-17 14:31:26,233 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-04-17 14:31:26,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:26,233 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-04-17 14:31:26,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 14:31:26,234 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-04-17 14:31:26,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 14:31:26,234 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:26,234 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:26,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:26,438 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:26,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:26,439 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-04-17 14:31:26,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:26,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394907311] [2020-04-17 14:31:26,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:26,561 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:26,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394907311] [2020-04-17 14:31:26,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460491060] [2020-04-17 14:31:26,562 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:26,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:26,606 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 14:31:26,607 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:26,616 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:26,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:26,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 14:31:26,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372984869] [2020-04-17 14:31:26,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:31:26,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:26,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:31:26,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:31:26,618 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-04-17 14:31:26,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:26,847 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-04-17 14:31:26,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 14:31:26,848 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 14:31:26,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:26,849 INFO L225 Difference]: With dead ends: 83 [2020-04-17 14:31:26,849 INFO L226 Difference]: Without dead ends: 77 [2020-04-17 14:31:26,850 INFO L678 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 [2020-04-17 14:31:26,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-17 14:31:26,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-04-17 14:31:26,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-04-17 14:31:26,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-04-17 14:31:26,853 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-04-17 14:31:26,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:26,854 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-04-17 14:31:26,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:31:26,854 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-04-17 14:31:26,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 14:31:26,854 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:26,854 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:27,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:27,058 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:27,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:27,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-04-17 14:31:27,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:27,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299949525] [2020-04-17 14:31:27,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:27,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:27,177 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:27,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299949525] [2020-04-17 14:31:27,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643136548] [2020-04-17 14:31:27,178 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:27,244 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:31:27,244 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:27,245 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 14:31:27,246 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:27,267 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:27,279 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:27,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:27,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 14:31:27,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495043729] [2020-04-17 14:31:27,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 14:31:27,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:27,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 14:31:27,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-04-17 14:31:27,281 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-04-17 14:31:27,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:27,581 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-04-17 14:31:27,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 14:31:27,585 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 14:31:27,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:27,586 INFO L225 Difference]: With dead ends: 89 [2020-04-17 14:31:27,586 INFO L226 Difference]: Without dead ends: 83 [2020-04-17 14:31:27,587 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-04-17 14:31:27,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-04-17 14:31:27,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-04-17 14:31:27,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-04-17 14:31:27,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-04-17 14:31:27,590 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-04-17 14:31:27,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:27,590 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-04-17 14:31:27,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 14:31:27,590 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-04-17 14:31:27,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 14:31:27,591 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:27,591 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:27,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:27,794 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:27,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:27,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-04-17 14:31:27,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:27,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184421276] [2020-04-17 14:31:27,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:27,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:27,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:27,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184421276] [2020-04-17 14:31:27,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83891885] [2020-04-17 14:31:27,893 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:27,954 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-04-17 14:31:27,955 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:27,956 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 14:31:27,957 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:27,972 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:27,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:27,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 14:31:27,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414413994] [2020-04-17 14:31:27,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:31:27,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:27,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:31:27,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:31:27,975 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-04-17 14:31:28,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:28,332 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-04-17 14:31:28,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 14:31:28,333 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 14:31:28,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:28,334 INFO L225 Difference]: With dead ends: 89 [2020-04-17 14:31:28,334 INFO L226 Difference]: Without dead ends: 83 [2020-04-17 14:31:28,335 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-04-17 14:31:28,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-04-17 14:31:28,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-04-17 14:31:28,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-17 14:31:28,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-04-17 14:31:28,338 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-04-17 14:31:28,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:28,339 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-04-17 14:31:28,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:31:28,339 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-04-17 14:31:28,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 14:31:28,340 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:28,340 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:28,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:28,544 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:28,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:28,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-04-17 14:31:28,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:28,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265189109] [2020-04-17 14:31:28,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:28,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:28,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:28,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265189109] [2020-04-17 14:31:28,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954779400] [2020-04-17 14:31:28,640 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:28,686 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:31:28,686 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:28,687 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 14:31:28,688 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:28,699 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:28,707 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:28,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:28,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 14:31:28,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780993539] [2020-04-17 14:31:28,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 14:31:28,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:28,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 14:31:28,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-04-17 14:31:28,709 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-04-17 14:31:29,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:29,044 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-04-17 14:31:29,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 14:31:29,044 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 14:31:29,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:29,045 INFO L225 Difference]: With dead ends: 86 [2020-04-17 14:31:29,045 INFO L226 Difference]: Without dead ends: 80 [2020-04-17 14:31:29,046 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-04-17 14:31:29,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-04-17 14:31:29,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-04-17 14:31:29,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-17 14:31:29,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-04-17 14:31:29,048 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-04-17 14:31:29,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:29,049 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-04-17 14:31:29,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 14:31:29,049 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-04-17 14:31:29,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 14:31:29,049 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:29,049 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:29,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:29,253 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:29,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:29,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-04-17 14:31:29,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:29,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610042096] [2020-04-17 14:31:29,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:29,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:29,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610042096] [2020-04-17 14:31:29,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770679872] [2020-04-17 14:31:29,353 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:29,399 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-04-17 14:31:29,399 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:29,400 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 14:31:29,401 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:29,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:29,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:29,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 14:31:29,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910047699] [2020-04-17 14:31:29,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:31:29,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:29,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:31:29,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:31:29,414 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-04-17 14:31:29,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:29,719 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-04-17 14:31:29,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 14:31:29,721 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 14:31:29,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:29,721 INFO L225 Difference]: With dead ends: 87 [2020-04-17 14:31:29,722 INFO L226 Difference]: Without dead ends: 81 [2020-04-17 14:31:29,722 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-04-17 14:31:29,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-04-17 14:31:29,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-04-17 14:31:29,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-04-17 14:31:29,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-04-17 14:31:29,725 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-04-17 14:31:29,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:29,725 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-04-17 14:31:29,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:31:29,725 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-04-17 14:31:29,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 14:31:29,726 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:29,726 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:29,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:29,930 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:29,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:29,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-04-17 14:31:29,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:29,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722371341] [2020-04-17 14:31:29,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:29,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:30,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:30,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722371341] [2020-04-17 14:31:30,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627862549] [2020-04-17 14:31:30,042 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:30,104 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-04-17 14:31:30,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:30,106 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 14:31:30,107 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:30,124 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:30,133 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:30,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:30,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 14:31:30,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902635170] [2020-04-17 14:31:30,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 14:31:30,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:30,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 14:31:30,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-04-17 14:31:30,135 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-04-17 14:31:30,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:30,517 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-04-17 14:31:30,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 14:31:30,517 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 14:31:30,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:30,518 INFO L225 Difference]: With dead ends: 84 [2020-04-17 14:31:30,518 INFO L226 Difference]: Without dead ends: 78 [2020-04-17 14:31:30,519 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-04-17 14:31:30,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-04-17 14:31:30,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-04-17 14:31:30,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 14:31:30,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-04-17 14:31:30,521 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-04-17 14:31:30,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:30,522 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-04-17 14:31:30,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 14:31:30,522 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-04-17 14:31:30,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 14:31:30,522 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:30,522 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:30,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:30,723 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:30,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:30,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-04-17 14:31:30,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:30,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216777054] [2020-04-17 14:31:30,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:30,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:30,808 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:30,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216777054] [2020-04-17 14:31:30,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262131639] [2020-04-17 14:31:30,809 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:30,853 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 14:31:30,854 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:30,868 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:30,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:30,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 14:31:30,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610607572] [2020-04-17 14:31:30,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:31:30,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:30,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:31:30,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:31:30,869 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-04-17 14:31:31,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:31,211 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-04-17 14:31:31,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 14:31:31,212 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 14:31:31,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:31,212 INFO L225 Difference]: With dead ends: 104 [2020-04-17 14:31:31,212 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 14:31:31,213 INFO L678 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 [2020-04-17 14:31:31,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 14:31:31,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-04-17 14:31:31,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 14:31:31,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-04-17 14:31:31,215 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-04-17 14:31:31,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:31,216 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-04-17 14:31:31,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:31:31,216 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-04-17 14:31:31,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 14:31:31,216 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:31,216 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:31,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:31,419 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:31,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:31,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-04-17 14:31:31,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:31,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314950033] [2020-04-17 14:31:31,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:31,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:31,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:31,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314950033] [2020-04-17 14:31:31,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811517134] [2020-04-17 14:31:31,519 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:31,565 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:31:31,565 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:31,566 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 14:31:31,567 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:31,583 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:31,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:31,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:31,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 14:31:31,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870145138] [2020-04-17 14:31:31,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 14:31:31,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:31,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 14:31:31,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-04-17 14:31:31,593 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-04-17 14:31:32,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:32,017 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-04-17 14:31:32,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 14:31:32,017 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 14:31:32,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:32,018 INFO L225 Difference]: With dead ends: 85 [2020-04-17 14:31:32,018 INFO L226 Difference]: Without dead ends: 77 [2020-04-17 14:31:32,019 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 14:31:32,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-17 14:31:32,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-04-17 14:31:32,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-04-17 14:31:32,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-04-17 14:31:32,021 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-04-17 14:31:32,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:32,021 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-04-17 14:31:32,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 14:31:32,022 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-04-17 14:31:32,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 14:31:32,022 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:32,022 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:32,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:32,223 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:32,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:32,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-04-17 14:31:32,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:32,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802630167] [2020-04-17 14:31:32,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:32,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:32,349 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:32,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802630167] [2020-04-17 14:31:32,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816515721] [2020-04-17 14:31:32,349 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:32,411 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-04-17 14:31:32,411 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:32,412 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 14:31:32,413 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:32,430 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:32,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:32,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-17 14:31:32,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665761816] [2020-04-17 14:31:32,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 14:31:32,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:32,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 14:31:32,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-04-17 14:31:32,432 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-04-17 14:31:32,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:32,711 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-04-17 14:31:32,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 14:31:32,712 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-04-17 14:31:32,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:32,713 INFO L225 Difference]: With dead ends: 94 [2020-04-17 14:31:32,713 INFO L226 Difference]: Without dead ends: 88 [2020-04-17 14:31:32,713 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:31:32,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-04-17 14:31:32,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-04-17 14:31:32,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-17 14:31:32,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-04-17 14:31:32,717 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-04-17 14:31:32,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:32,717 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-04-17 14:31:32,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 14:31:32,717 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-04-17 14:31:32,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 14:31:32,718 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:32,718 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:32,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:32,922 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:32,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:32,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-04-17 14:31:32,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:32,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174635643] [2020-04-17 14:31:32,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:32,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:33,029 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:33,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174635643] [2020-04-17 14:31:33,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305363500] [2020-04-17 14:31:33,030 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:33,072 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:31:33,072 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:33,073 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 14:31:33,074 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:33,086 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:33,092 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:33,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:33,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 14:31:33,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141492376] [2020-04-17 14:31:33,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:31:33,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:33,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:31:33,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:31:33,093 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-04-17 14:31:33,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:33,361 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-04-17 14:31:33,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 14:31:33,362 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 14:31:33,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:33,363 INFO L225 Difference]: With dead ends: 91 [2020-04-17 14:31:33,363 INFO L226 Difference]: Without dead ends: 85 [2020-04-17 14:31:33,363 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-04-17 14:31:33,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-04-17 14:31:33,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-04-17 14:31:33,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 14:31:33,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-04-17 14:31:33,367 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-04-17 14:31:33,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:33,367 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-04-17 14:31:33,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:31:33,367 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-04-17 14:31:33,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 14:31:33,368 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:33,368 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:33,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:33,571 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:33,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:33,572 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-04-17 14:31:33,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:33,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259450996] [2020-04-17 14:31:33,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:33,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:33,677 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:33,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259450996] [2020-04-17 14:31:33,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323264950] [2020-04-17 14:31:33,678 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:33,729 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-04-17 14:31:33,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:33,730 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 14:31:33,731 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:33,741 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:33,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:33,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-17 14:31:33,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228342729] [2020-04-17 14:31:33,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 14:31:33,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:33,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 14:31:33,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-04-17 14:31:33,743 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-04-17 14:31:33,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:33,992 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-04-17 14:31:33,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 14:31:33,993 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-04-17 14:31:33,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:33,993 INFO L225 Difference]: With dead ends: 88 [2020-04-17 14:31:33,994 INFO L226 Difference]: Without dead ends: 82 [2020-04-17 14:31:33,994 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-04-17 14:31:33,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-04-17 14:31:33,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-04-17 14:31:33,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-17 14:31:33,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-04-17 14:31:33,997 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-04-17 14:31:33,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:33,997 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-04-17 14:31:33,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 14:31:33,997 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-04-17 14:31:33,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 14:31:33,998 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:33,998 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:34,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:34,200 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:34,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:34,200 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-04-17 14:31:34,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:34,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377995683] [2020-04-17 14:31:34,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:34,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:34,303 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:34,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377995683] [2020-04-17 14:31:34,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476217633] [2020-04-17 14:31:34,304 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:34,352 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-04-17 14:31:34,352 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:34,353 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 14:31:34,354 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:34,374 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:34,404 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:34,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:34,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 14:31:34,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808832315] [2020-04-17 14:31:34,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:31:34,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:34,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:31:34,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:31:34,406 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-04-17 14:31:34,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:34,732 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-04-17 14:31:34,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 14:31:34,732 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 14:31:34,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:34,733 INFO L225 Difference]: With dead ends: 87 [2020-04-17 14:31:34,733 INFO L226 Difference]: Without dead ends: 81 [2020-04-17 14:31:34,734 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-04-17 14:31:34,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-04-17 14:31:34,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-04-17 14:31:34,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 14:31:34,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-04-17 14:31:34,737 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-04-17 14:31:34,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:34,737 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-04-17 14:31:34,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:31:34,737 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-04-17 14:31:34,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 14:31:34,737 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:34,737 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:34,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:34,941 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:34,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:34,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-04-17 14:31:34,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:34,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500253041] [2020-04-17 14:31:34,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:34,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:35,043 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:35,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500253041] [2020-04-17 14:31:35,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175896757] [2020-04-17 14:31:35,044 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:35,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:35,091 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 14:31:35,091 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:35,101 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:35,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:35,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-17 14:31:35,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795409153] [2020-04-17 14:31:35,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 14:31:35,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:35,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 14:31:35,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-04-17 14:31:35,103 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-04-17 14:31:35,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:35,399 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-04-17 14:31:35,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 14:31:35,399 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-04-17 14:31:35,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:35,400 INFO L225 Difference]: With dead ends: 84 [2020-04-17 14:31:35,400 INFO L226 Difference]: Without dead ends: 78 [2020-04-17 14:31:35,401 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-04-17 14:31:35,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-04-17 14:31:35,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-04-17 14:31:35,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-17 14:31:35,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-04-17 14:31:35,403 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-04-17 14:31:35,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:35,404 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-04-17 14:31:35,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 14:31:35,404 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-04-17 14:31:35,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 14:31:35,404 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:35,404 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:35,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:35,607 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:35,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:35,608 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-04-17 14:31:35,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:35,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594600957] [2020-04-17 14:31:35,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:35,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:35,719 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:35,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594600957] [2020-04-17 14:31:35,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031869762] [2020-04-17 14:31:35,720 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:35,763 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:31:35,763 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:35,764 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 14:31:35,765 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:35,787 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:35,796 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:35,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:35,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 14:31:35,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382343777] [2020-04-17 14:31:35,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:31:35,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:35,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:31:35,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:31:35,797 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-04-17 14:31:36,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:36,202 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-04-17 14:31:36,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 14:31:36,202 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 14:31:36,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:36,203 INFO L225 Difference]: With dead ends: 83 [2020-04-17 14:31:36,203 INFO L226 Difference]: Without dead ends: 77 [2020-04-17 14:31:36,204 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-04-17 14:31:36,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-17 14:31:36,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-04-17 14:31:36,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 14:31:36,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-04-17 14:31:36,207 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-04-17 14:31:36,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:36,207 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-04-17 14:31:36,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:31:36,207 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-04-17 14:31:36,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 14:31:36,208 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:36,208 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:36,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:36,411 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:36,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:36,412 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-04-17 14:31:36,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:36,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656192483] [2020-04-17 14:31:36,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:36,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:36,500 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:36,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656192483] [2020-04-17 14:31:36,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095544062] [2020-04-17 14:31:36,501 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:36,546 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-04-17 14:31:36,547 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:36,547 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 14:31:36,548 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:36,557 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:36,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:36,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-17 14:31:36,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346208988] [2020-04-17 14:31:36,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 14:31:36,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:36,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 14:31:36,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-04-17 14:31:36,558 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-04-17 14:31:36,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:36,901 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-04-17 14:31:36,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 14:31:36,901 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-04-17 14:31:36,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:36,902 INFO L225 Difference]: With dead ends: 80 [2020-04-17 14:31:36,902 INFO L226 Difference]: Without dead ends: 74 [2020-04-17 14:31:36,903 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-04-17 14:31:36,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-04-17 14:31:36,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-04-17 14:31:36,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-17 14:31:36,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-04-17 14:31:36,906 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-04-17 14:31:36,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:36,906 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-04-17 14:31:36,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 14:31:36,906 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-04-17 14:31:36,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 14:31:36,906 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:36,907 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:37,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:37,110 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:37,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:37,110 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-04-17 14:31:37,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:37,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869578792] [2020-04-17 14:31:37,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:37,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:37,192 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:37,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869578792] [2020-04-17 14:31:37,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305881202] [2020-04-17 14:31:37,193 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:37,237 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:31:37,237 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:37,238 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 14:31:37,239 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:37,254 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:37,262 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:37,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:37,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 14:31:37,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65298783] [2020-04-17 14:31:37,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:31:37,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:37,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:31:37,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:31:37,263 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-04-17 14:31:37,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:37,703 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-04-17 14:31:37,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 14:31:37,703 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 14:31:37,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:37,704 INFO L225 Difference]: With dead ends: 79 [2020-04-17 14:31:37,704 INFO L226 Difference]: Without dead ends: 73 [2020-04-17 14:31:37,704 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 14:31:37,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-04-17 14:31:37,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-04-17 14:31:37,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 14:31:37,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-04-17 14:31:37,707 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-04-17 14:31:37,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:37,707 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-04-17 14:31:37,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:31:37,707 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-04-17 14:31:37,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 14:31:37,707 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:37,708 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:37,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:37,910 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:37,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:37,910 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-04-17 14:31:37,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:37,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227371444] [2020-04-17 14:31:37,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:37,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:37,992 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:37,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227371444] [2020-04-17 14:31:37,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017706014] [2020-04-17 14:31:37,993 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:38,043 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-04-17 14:31:38,044 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:38,045 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 14:31:38,045 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:38,055 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:38,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:38,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-17 14:31:38,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712245443] [2020-04-17 14:31:38,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 14:31:38,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:38,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 14:31:38,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-04-17 14:31:38,057 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-04-17 14:31:38,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:38,429 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-04-17 14:31:38,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 14:31:38,430 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-04-17 14:31:38,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:38,431 INFO L225 Difference]: With dead ends: 95 [2020-04-17 14:31:38,431 INFO L226 Difference]: Without dead ends: 89 [2020-04-17 14:31:38,431 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 14:31:38,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-04-17 14:31:38,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-04-17 14:31:38,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-17 14:31:38,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-04-17 14:31:38,435 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-04-17 14:31:38,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:38,435 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-04-17 14:31:38,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 14:31:38,435 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-04-17 14:31:38,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 14:31:38,435 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:38,435 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:38,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:38,636 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:38,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:38,637 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-04-17 14:31:38,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:38,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964471222] [2020-04-17 14:31:38,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:38,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:38,744 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:38,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964471222] [2020-04-17 14:31:38,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582480925] [2020-04-17 14:31:38,745 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:38,793 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-04-17 14:31:38,793 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:38,794 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 14:31:38,795 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:38,816 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:38,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:38,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 14:31:38,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853372993] [2020-04-17 14:31:38,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:31:38,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:38,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:31:38,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:31:38,817 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-04-17 14:31:39,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:39,247 INFO L93 Difference]: Finished difference Result 74 states and 181 transitions. [2020-04-17 14:31:39,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 14:31:39,248 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 14:31:39,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:39,249 INFO L225 Difference]: With dead ends: 74 [2020-04-17 14:31:39,249 INFO L226 Difference]: Without dead ends: 66 [2020-04-17 14:31:39,249 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=796, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 14:31:39,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-04-17 14:31:39,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 49. [2020-04-17 14:31:39,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-04-17 14:31:39,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-04-17 14:31:39,252 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-04-17 14:31:39,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:39,252 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-04-17 14:31:39,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:31:39,253 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-04-17 14:31:39,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 14:31:39,253 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:39,253 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:39,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:39,456 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:39,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:39,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-04-17 14:31:39,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:39,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732790698] [2020-04-17 14:31:39,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:39,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:39,535 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:39,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732790698] [2020-04-17 14:31:39,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393431575] [2020-04-17 14:31:39,536 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:39,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:39,578 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 14:31:39,579 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:39,591 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:39,600 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:39,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:39,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 14:31:39,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875114583] [2020-04-17 14:31:39,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:31:39,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:39,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:31:39,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:31:39,602 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-04-17 14:31:40,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:40,042 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-04-17 14:31:40,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 14:31:40,043 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 14:31:40,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:40,044 INFO L225 Difference]: With dead ends: 84 [2020-04-17 14:31:40,044 INFO L226 Difference]: Without dead ends: 79 [2020-04-17 14:31:40,044 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 14:31:40,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-04-17 14:31:40,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-04-17 14:31:40,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 14:31:40,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-04-17 14:31:40,047 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-04-17 14:31:40,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:40,047 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-04-17 14:31:40,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:31:40,047 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-04-17 14:31:40,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 14:31:40,048 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:40,048 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:40,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:40,251 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:40,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:40,252 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-04-17 14:31:40,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:40,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148524053] [2020-04-17 14:31:40,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:40,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:40,334 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:40,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148524053] [2020-04-17 14:31:40,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563957870] [2020-04-17 14:31:40,335 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:40,382 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:31:40,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:40,383 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 14:31:40,384 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:40,397 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:40,406 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:40,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:40,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-17 14:31:40,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328363969] [2020-04-17 14:31:40,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 14:31:40,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:40,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 14:31:40,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-04-17 14:31:40,407 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-04-17 14:31:40,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:40,890 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-04-17 14:31:40,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 14:31:40,891 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-04-17 14:31:40,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:40,892 INFO L225 Difference]: With dead ends: 72 [2020-04-17 14:31:40,892 INFO L226 Difference]: Without dead ends: 67 [2020-04-17 14:31:40,892 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 14:31:40,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-04-17 14:31:40,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-04-17 14:31:40,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 14:31:40,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-04-17 14:31:40,894 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-04-17 14:31:40,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:40,895 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-04-17 14:31:40,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 14:31:40,895 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-04-17 14:31:40,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 14:31:40,895 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:40,895 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:41,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:41,096 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:41,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:41,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-04-17 14:31:41,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:41,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094547060] [2020-04-17 14:31:41,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:41,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:41,266 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:41,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094547060] [2020-04-17 14:31:41,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077475793] [2020-04-17 14:31:41,267 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:41,314 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-04-17 14:31:41,314 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:41,315 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 14:31:41,315 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:41,322 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:41,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:41,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-04-17 14:31:41,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374226210] [2020-04-17 14:31:41,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:31:41,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:41,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:31:41,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:31:41,323 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-04-17 14:31:41,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:41,525 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-04-17 14:31:41,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 14:31:41,526 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-04-17 14:31:41,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:41,527 INFO L225 Difference]: With dead ends: 78 [2020-04-17 14:31:41,527 INFO L226 Difference]: Without dead ends: 72 [2020-04-17 14:31:41,527 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:31:41,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-04-17 14:31:41,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-04-17 14:31:41,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 14:31:41,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-04-17 14:31:41,530 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-04-17 14:31:41,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:41,531 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-04-17 14:31:41,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:31:41,531 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-04-17 14:31:41,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 14:31:41,531 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:41,531 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:41,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:41,734 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:41,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:41,735 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-04-17 14:31:41,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:41,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124934770] [2020-04-17 14:31:41,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:41,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:41,876 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:41,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124934770] [2020-04-17 14:31:41,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368885977] [2020-04-17 14:31:41,877 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:41,923 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:31:41,923 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:41,924 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 14:31:41,924 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:41,940 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:41,945 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:41,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:41,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-17 14:31:41,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759652908] [2020-04-17 14:31:41,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 14:31:41,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:41,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 14:31:41,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 14:31:41,946 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-04-17 14:31:42,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:42,181 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-04-17 14:31:42,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 14:31:42,181 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-04-17 14:31:42,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:42,182 INFO L225 Difference]: With dead ends: 90 [2020-04-17 14:31:42,182 INFO L226 Difference]: Without dead ends: 84 [2020-04-17 14:31:42,183 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2020-04-17 14:31:42,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-04-17 14:31:42,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-04-17 14:31:42,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-17 14:31:42,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-04-17 14:31:42,186 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-04-17 14:31:42,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:42,186 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-04-17 14:31:42,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 14:31:42,186 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-04-17 14:31:42,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 14:31:42,187 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:42,187 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:42,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:42,390 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:42,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:42,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-04-17 14:31:42,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:42,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565099338] [2020-04-17 14:31:42,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:42,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:42,510 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:42,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565099338] [2020-04-17 14:31:42,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937795258] [2020-04-17 14:31:42,511 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:42,558 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-04-17 14:31:42,558 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:42,559 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 14:31:42,559 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:42,566 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:42,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:42,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-04-17 14:31:42,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513209685] [2020-04-17 14:31:42,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:31:42,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:42,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:31:42,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:31:42,567 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-04-17 14:31:42,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:42,841 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-04-17 14:31:42,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 14:31:42,842 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-04-17 14:31:42,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:42,843 INFO L225 Difference]: With dead ends: 91 [2020-04-17 14:31:42,843 INFO L226 Difference]: Without dead ends: 85 [2020-04-17 14:31:42,843 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-04-17 14:31:42,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-04-17 14:31:42,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-04-17 14:31:42,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-04-17 14:31:42,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-04-17 14:31:42,846 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-04-17 14:31:42,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:42,846 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-04-17 14:31:42,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:31:42,846 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-04-17 14:31:42,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 14:31:42,847 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:42,847 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:43,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:43,047 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:43,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:43,048 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-04-17 14:31:43,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:43,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68182180] [2020-04-17 14:31:43,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:43,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:43,172 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:43,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68182180] [2020-04-17 14:31:43,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350090247] [2020-04-17 14:31:43,173 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:43,218 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-04-17 14:31:43,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:43,219 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 14:31:43,220 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:43,232 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:43,239 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:43,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:43,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-17 14:31:43,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515206420] [2020-04-17 14:31:43,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 14:31:43,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:43,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 14:31:43,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-04-17 14:31:43,240 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-04-17 14:31:43,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:43,543 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-04-17 14:31:43,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 14:31:43,544 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-04-17 14:31:43,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:43,544 INFO L225 Difference]: With dead ends: 99 [2020-04-17 14:31:43,545 INFO L226 Difference]: Without dead ends: 93 [2020-04-17 14:31:43,545 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-04-17 14:31:43,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-04-17 14:31:43,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-04-17 14:31:43,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 14:31:43,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-04-17 14:31:43,548 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-04-17 14:31:43,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:43,548 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-04-17 14:31:43,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 14:31:43,548 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-04-17 14:31:43,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 14:31:43,548 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:43,549 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:43,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:43,749 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:43,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:43,750 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-04-17 14:31:43,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:43,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197491840] [2020-04-17 14:31:43,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:43,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:43,889 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:43,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197491840] [2020-04-17 14:31:43,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747030765] [2020-04-17 14:31:43,890 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:43,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:43,941 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 14:31:43,942 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:43,953 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:43,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:43,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-04-17 14:31:43,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301399647] [2020-04-17 14:31:43,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:31:43,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:43,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:31:43,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:31:43,954 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-04-17 14:31:44,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:44,269 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-04-17 14:31:44,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 14:31:44,269 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-04-17 14:31:44,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:44,270 INFO L225 Difference]: With dead ends: 99 [2020-04-17 14:31:44,270 INFO L226 Difference]: Without dead ends: 93 [2020-04-17 14:31:44,270 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-04-17 14:31:44,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-04-17 14:31:44,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-04-17 14:31:44,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-04-17 14:31:44,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-04-17 14:31:44,273 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-04-17 14:31:44,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:44,273 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-04-17 14:31:44,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:31:44,273 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-04-17 14:31:44,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 14:31:44,273 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:44,274 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:44,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:44,474 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:44,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:44,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-04-17 14:31:44,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:44,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007540514] [2020-04-17 14:31:44,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:44,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:44,585 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:44,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007540514] [2020-04-17 14:31:44,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747777440] [2020-04-17 14:31:44,586 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:44,632 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:31:44,632 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:44,633 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 14:31:44,633 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:44,648 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:44,656 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:44,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:44,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-17 14:31:44,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261195224] [2020-04-17 14:31:44,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 14:31:44,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:44,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 14:31:44,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-04-17 14:31:44,657 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-04-17 14:31:45,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:45,045 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-04-17 14:31:45,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 14:31:45,046 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-04-17 14:31:45,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:45,047 INFO L225 Difference]: With dead ends: 96 [2020-04-17 14:31:45,047 INFO L226 Difference]: Without dead ends: 90 [2020-04-17 14:31:45,048 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 14:31:45,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-04-17 14:31:45,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-04-17 14:31:45,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-04-17 14:31:45,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-04-17 14:31:45,050 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-04-17 14:31:45,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:45,050 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-04-17 14:31:45,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 14:31:45,051 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-04-17 14:31:45,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 14:31:45,051 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:45,051 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:45,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:45,252 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:45,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:45,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-04-17 14:31:45,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:45,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506388013] [2020-04-17 14:31:45,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:45,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:45,379 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:45,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506388013] [2020-04-17 14:31:45,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892472236] [2020-04-17 14:31:45,380 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:45,434 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-04-17 14:31:45,435 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:45,436 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 14:31:45,436 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:45,445 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:45,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:45,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-04-17 14:31:45,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154032472] [2020-04-17 14:31:45,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:31:45,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:45,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:31:45,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:31:45,446 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-04-17 14:31:45,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:45,806 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-04-17 14:31:45,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 14:31:45,807 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-04-17 14:31:45,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:45,808 INFO L225 Difference]: With dead ends: 97 [2020-04-17 14:31:45,808 INFO L226 Difference]: Without dead ends: 91 [2020-04-17 14:31:45,808 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 14:31:45,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-04-17 14:31:45,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-04-17 14:31:45,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-17 14:31:45,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-04-17 14:31:45,811 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-04-17 14:31:45,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:45,811 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-04-17 14:31:45,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:31:45,811 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-04-17 14:31:45,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 14:31:45,812 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:45,812 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:46,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:46,015 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:46,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:46,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-04-17 14:31:46,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:46,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538566859] [2020-04-17 14:31:46,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:46,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:46,111 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:46,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538566859] [2020-04-17 14:31:46,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049684868] [2020-04-17 14:31:46,112 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:46,162 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:31:46,163 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:46,164 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 14:31:46,164 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:46,177 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:46,184 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:46,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:46,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-17 14:31:46,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523235598] [2020-04-17 14:31:46,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 14:31:46,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:46,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 14:31:46,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-04-17 14:31:46,186 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-04-17 14:31:46,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:46,615 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-04-17 14:31:46,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 14:31:46,616 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-04-17 14:31:46,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:46,617 INFO L225 Difference]: With dead ends: 94 [2020-04-17 14:31:46,617 INFO L226 Difference]: Without dead ends: 88 [2020-04-17 14:31:46,617 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-04-17 14:31:46,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-04-17 14:31:46,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-04-17 14:31:46,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 14:31:46,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-04-17 14:31:46,620 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-04-17 14:31:46,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:46,621 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-04-17 14:31:46,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 14:31:46,621 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-04-17 14:31:46,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 14:31:46,621 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:46,621 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:46,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:46,824 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:46,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:46,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-04-17 14:31:46,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:46,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561145562] [2020-04-17 14:31:46,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:46,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:46,943 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:46,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561145562] [2020-04-17 14:31:46,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669673441] [2020-04-17 14:31:46,943 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:46,989 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-04-17 14:31:46,990 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:46,990 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 14:31:46,991 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:47,002 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:47,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:47,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-04-17 14:31:47,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810627430] [2020-04-17 14:31:47,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:31:47,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:47,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:31:47,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:31:47,004 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-04-17 14:31:47,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:47,388 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-04-17 14:31:47,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 14:31:47,389 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-04-17 14:31:47,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:47,390 INFO L225 Difference]: With dead ends: 95 [2020-04-17 14:31:47,390 INFO L226 Difference]: Without dead ends: 89 [2020-04-17 14:31:47,390 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 14:31:47,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-04-17 14:31:47,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-04-17 14:31:47,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-04-17 14:31:47,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-04-17 14:31:47,393 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-04-17 14:31:47,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:47,393 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-04-17 14:31:47,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:31:47,393 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-04-17 14:31:47,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 14:31:47,393 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:47,393 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:47,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:47,594 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:47,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:47,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-04-17 14:31:47,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:47,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668190261] [2020-04-17 14:31:47,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:47,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:47,697 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:47,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668190261] [2020-04-17 14:31:47,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837218867] [2020-04-17 14:31:47,697 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:47,745 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-04-17 14:31:47,745 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:47,746 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:31:47,747 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:47,782 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:47,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:47,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-17 14:31:47,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531268096] [2020-04-17 14:31:47,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 14:31:47,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:47,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 14:31:47,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-04-17 14:31:47,784 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-04-17 14:31:48,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:48,280 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-04-17 14:31:48,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 14:31:48,280 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-04-17 14:31:48,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:48,281 INFO L225 Difference]: With dead ends: 92 [2020-04-17 14:31:48,281 INFO L226 Difference]: Without dead ends: 86 [2020-04-17 14:31:48,282 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=371, Invalid=961, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 14:31:48,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-04-17 14:31:48,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-04-17 14:31:48,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 14:31:48,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-04-17 14:31:48,285 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-04-17 14:31:48,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:48,285 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-04-17 14:31:48,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 14:31:48,285 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-04-17 14:31:48,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 14:31:48,286 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:48,286 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:48,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:48,489 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:48,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:48,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-04-17 14:31:48,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:48,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464804322] [2020-04-17 14:31:48,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:48,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:48,577 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:48,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464804322] [2020-04-17 14:31:48,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350973136] [2020-04-17 14:31:48,577 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:48,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:48,623 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 14:31:48,624 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:48,633 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:48,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:48,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-04-17 14:31:48,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827868681] [2020-04-17 14:31:48,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:31:48,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:48,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:31:48,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:31:48,635 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-04-17 14:31:49,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:49,063 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-04-17 14:31:49,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 14:31:49,063 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-04-17 14:31:49,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:49,064 INFO L225 Difference]: With dead ends: 112 [2020-04-17 14:31:49,064 INFO L226 Difference]: Without dead ends: 106 [2020-04-17 14:31:49,065 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-04-17 14:31:49,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-04-17 14:31:49,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-04-17 14:31:49,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-04-17 14:31:49,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-04-17 14:31:49,068 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-04-17 14:31:49,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:49,068 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-04-17 14:31:49,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:31:49,068 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-04-17 14:31:49,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 14:31:49,069 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:49,069 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:49,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:49,271 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:49,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:49,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-04-17 14:31:49,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:49,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363155766] [2020-04-17 14:31:49,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:49,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:49,372 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:49,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363155766] [2020-04-17 14:31:49,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778030159] [2020-04-17 14:31:49,373 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:49,438 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:31:49,438 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:49,439 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 14:31:49,441 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:49,460 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:49,477 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:49,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:49,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-17 14:31:49,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85424627] [2020-04-17 14:31:49,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 14:31:49,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:49,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 14:31:49,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 14:31:49,479 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-04-17 14:31:50,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:50,117 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-04-17 14:31:50,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 14:31:50,118 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-04-17 14:31:50,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:50,119 INFO L225 Difference]: With dead ends: 93 [2020-04-17 14:31:50,119 INFO L226 Difference]: Without dead ends: 85 [2020-04-17 14:31:50,119 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=469, Invalid=1013, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 14:31:50,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-04-17 14:31:50,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-04-17 14:31:50,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-04-17 14:31:50,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-04-17 14:31:50,121 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-04-17 14:31:50,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:50,122 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-04-17 14:31:50,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 14:31:50,122 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-04-17 14:31:50,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 14:31:50,122 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:50,122 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:50,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:50,323 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:50,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:50,324 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-04-17 14:31:50,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:50,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167643017] [2020-04-17 14:31:50,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:50,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:50,462 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:50,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167643017] [2020-04-17 14:31:50,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327369171] [2020-04-17 14:31:50,463 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:50,509 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-04-17 14:31:50,509 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:50,510 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 14:31:50,511 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:50,521 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:50,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:50,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-04-17 14:31:50,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424500406] [2020-04-17 14:31:50,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 14:31:50,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:50,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 14:31:50,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-04-17 14:31:50,523 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-04-17 14:31:50,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:50,774 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-04-17 14:31:50,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 14:31:50,775 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-04-17 14:31:50,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:50,776 INFO L225 Difference]: With dead ends: 104 [2020-04-17 14:31:50,776 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 14:31:50,776 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-04-17 14:31:50,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 14:31:50,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-04-17 14:31:50,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 14:31:50,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-04-17 14:31:50,779 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-04-17 14:31:50,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:50,779 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-04-17 14:31:50,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 14:31:50,779 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-04-17 14:31:50,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 14:31:50,780 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:50,780 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:50,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:50,983 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:50,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:50,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-04-17 14:31:50,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:50,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208819900] [2020-04-17 14:31:50,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:50,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:51,114 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:51,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208819900] [2020-04-17 14:31:51,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348595405] [2020-04-17 14:31:51,115 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:51,159 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:31:51,160 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:51,160 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 14:31:51,161 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:51,200 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:51,209 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:51,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:51,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-17 14:31:51,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007916235] [2020-04-17 14:31:51,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:31:51,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:51,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:31:51,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:31:51,210 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-04-17 14:31:51,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:51,525 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-04-17 14:31:51,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 14:31:51,525 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-04-17 14:31:51,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:51,526 INFO L225 Difference]: With dead ends: 101 [2020-04-17 14:31:51,526 INFO L226 Difference]: Without dead ends: 95 [2020-04-17 14:31:51,527 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-04-17 14:31:51,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-04-17 14:31:51,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-04-17 14:31:51,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 14:31:51,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-04-17 14:31:51,529 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-04-17 14:31:51,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:51,529 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-04-17 14:31:51,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:31:51,529 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-04-17 14:31:51,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 14:31:51,529 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:51,530 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:51,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:51,730 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:51,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:51,731 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-04-17 14:31:51,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:51,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445162510] [2020-04-17 14:31:51,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:51,853 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:51,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445162510] [2020-04-17 14:31:51,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736732492] [2020-04-17 14:31:51,854 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:51,901 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-04-17 14:31:51,901 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:51,902 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 14:31:51,903 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:51,929 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:51,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:51,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-04-17 14:31:51,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108030657] [2020-04-17 14:31:51,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 14:31:51,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:51,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 14:31:51,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-04-17 14:31:51,930 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-04-17 14:31:52,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:52,228 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-04-17 14:31:52,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 14:31:52,229 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-04-17 14:31:52,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:52,230 INFO L225 Difference]: With dead ends: 98 [2020-04-17 14:31:52,230 INFO L226 Difference]: Without dead ends: 92 [2020-04-17 14:31:52,230 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-04-17 14:31:52,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-04-17 14:31:52,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-04-17 14:31:52,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 14:31:52,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-04-17 14:31:52,233 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-04-17 14:31:52,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:52,233 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-04-17 14:31:52,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 14:31:52,233 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-04-17 14:31:52,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 14:31:52,234 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:52,234 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:52,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:52,436 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:52,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:52,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-04-17 14:31:52,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:52,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671140811] [2020-04-17 14:31:52,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:52,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:52,561 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:52,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671140811] [2020-04-17 14:31:52,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026948551] [2020-04-17 14:31:52,562 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:52,608 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-04-17 14:31:52,608 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:52,609 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 14:31:52,609 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:52,628 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:52,636 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:52,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:52,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-17 14:31:52,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600675003] [2020-04-17 14:31:52,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:31:52,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:52,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:31:52,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:31:52,637 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-04-17 14:31:53,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:53,043 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-04-17 14:31:53,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 14:31:53,043 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-04-17 14:31:53,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:53,044 INFO L225 Difference]: With dead ends: 97 [2020-04-17 14:31:53,044 INFO L226 Difference]: Without dead ends: 91 [2020-04-17 14:31:53,045 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 14:31:53,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-04-17 14:31:53,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-04-17 14:31:53,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 14:31:53,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-04-17 14:31:53,048 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-04-17 14:31:53,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:53,048 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-04-17 14:31:53,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:31:53,048 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-04-17 14:31:53,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 14:31:53,049 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:53,049 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:53,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:53,252 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:53,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:53,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-04-17 14:31:53,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:53,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89956833] [2020-04-17 14:31:53,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:53,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:53,359 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:53,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89956833] [2020-04-17 14:31:53,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326191900] [2020-04-17 14:31:53,360 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:53,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:53,410 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 14:31:53,410 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:53,419 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:53,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:53,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-04-17 14:31:53,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748309389] [2020-04-17 14:31:53,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 14:31:53,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:53,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 14:31:53,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-04-17 14:31:53,420 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-04-17 14:31:53,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:53,741 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-04-17 14:31:53,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 14:31:53,741 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-04-17 14:31:53,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:53,742 INFO L225 Difference]: With dead ends: 94 [2020-04-17 14:31:53,743 INFO L226 Difference]: Without dead ends: 88 [2020-04-17 14:31:53,743 INFO L678 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 [2020-04-17 14:31:53,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-04-17 14:31:53,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-04-17 14:31:53,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 14:31:53,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-04-17 14:31:53,746 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-04-17 14:31:53,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:53,746 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-04-17 14:31:53,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 14:31:53,746 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-04-17 14:31:53,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 14:31:53,747 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:53,747 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:53,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:53,950 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:53,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:53,950 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-04-17 14:31:53,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:53,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144240367] [2020-04-17 14:31:53,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:53,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:54,080 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:54,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144240367] [2020-04-17 14:31:54,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615283894] [2020-04-17 14:31:54,082 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:54,130 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:31:54,131 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:54,132 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 14:31:54,132 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:54,148 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:54,158 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:54,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:54,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-17 14:31:54,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193705766] [2020-04-17 14:31:54,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:31:54,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:54,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:31:54,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:31:54,160 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-04-17 14:31:54,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:54,604 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-04-17 14:31:54,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 14:31:54,604 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-04-17 14:31:54,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:54,605 INFO L225 Difference]: With dead ends: 93 [2020-04-17 14:31:54,605 INFO L226 Difference]: Without dead ends: 87 [2020-04-17 14:31:54,606 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 14:31:54,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-04-17 14:31:54,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-04-17 14:31:54,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 14:31:54,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-04-17 14:31:54,608 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-04-17 14:31:54,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:54,608 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-04-17 14:31:54,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:31:54,608 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-04-17 14:31:54,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 14:31:54,609 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:54,609 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:54,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:54,809 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:54,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:54,810 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-04-17 14:31:54,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:54,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105469078] [2020-04-17 14:31:54,811 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:54,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:54,916 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:54,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105469078] [2020-04-17 14:31:54,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077283157] [2020-04-17 14:31:54,917 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:54,970 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-04-17 14:31:54,970 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:54,971 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 14:31:54,972 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:54,984 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:54,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:54,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-04-17 14:31:54,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694661088] [2020-04-17 14:31:54,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 14:31:54,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:54,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 14:31:54,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-04-17 14:31:54,985 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-04-17 14:31:55,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:55,362 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-04-17 14:31:55,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 14:31:55,363 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-04-17 14:31:55,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:55,364 INFO L225 Difference]: With dead ends: 90 [2020-04-17 14:31:55,364 INFO L226 Difference]: Without dead ends: 84 [2020-04-17 14:31:55,364 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-04-17 14:31:55,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-04-17 14:31:55,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-04-17 14:31:55,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 14:31:55,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-04-17 14:31:55,367 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-04-17 14:31:55,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:55,367 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-04-17 14:31:55,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 14:31:55,367 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-04-17 14:31:55,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 14:31:55,367 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:55,368 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:55,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:55,568 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:55,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:55,569 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-04-17 14:31:55,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:55,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059960919] [2020-04-17 14:31:55,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:55,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:55,669 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:55,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059960919] [2020-04-17 14:31:55,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179169547] [2020-04-17 14:31:55,670 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:55,714 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:31:55,714 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:55,715 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 14:31:55,715 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:55,730 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:55,740 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:55,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:55,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-17 14:31:55,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043044560] [2020-04-17 14:31:55,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:31:55,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:55,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:31:55,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:31:55,742 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-04-17 14:31:56,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:56,249 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-04-17 14:31:56,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 14:31:56,249 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-04-17 14:31:56,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:56,250 INFO L225 Difference]: With dead ends: 89 [2020-04-17 14:31:56,250 INFO L226 Difference]: Without dead ends: 83 [2020-04-17 14:31:56,251 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-04-17 14:31:56,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-04-17 14:31:56,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-04-17 14:31:56,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 14:31:56,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-04-17 14:31:56,253 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-04-17 14:31:56,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:56,253 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-04-17 14:31:56,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:31:56,253 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-04-17 14:31:56,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 14:31:56,254 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:56,254 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:56,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:56,454 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:56,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:56,455 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-04-17 14:31:56,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:56,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686884889] [2020-04-17 14:31:56,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:56,555 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:56,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686884889] [2020-04-17 14:31:56,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897150289] [2020-04-17 14:31:56,555 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:56,618 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-04-17 14:31:56,618 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:56,619 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 14:31:56,620 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:56,641 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:56,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:56,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-04-17 14:31:56,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383455675] [2020-04-17 14:31:56,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 14:31:56,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:56,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 14:31:56,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-04-17 14:31:56,642 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-04-17 14:31:57,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:57,048 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-04-17 14:31:57,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 14:31:57,049 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-04-17 14:31:57,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:57,050 INFO L225 Difference]: With dead ends: 86 [2020-04-17 14:31:57,050 INFO L226 Difference]: Without dead ends: 80 [2020-04-17 14:31:57,050 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 14:31:57,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-04-17 14:31:57,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-04-17 14:31:57,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 14:31:57,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-04-17 14:31:57,053 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-04-17 14:31:57,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:57,054 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-04-17 14:31:57,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 14:31:57,054 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-04-17 14:31:57,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 14:31:57,054 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:57,054 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:57,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:57,258 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:57,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:57,258 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-04-17 14:31:57,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:57,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114333820] [2020-04-17 14:31:57,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:57,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:57,356 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:57,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114333820] [2020-04-17 14:31:57,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723890571] [2020-04-17 14:31:57,356 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:57,406 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-04-17 14:31:57,407 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:57,407 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:31:57,408 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:57,463 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:57,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:57,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-17 14:31:57,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851042793] [2020-04-17 14:31:57,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:31:57,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:57,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:31:57,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:31:57,465 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-04-17 14:31:57,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:57,977 INFO L93 Difference]: Finished difference Result 83 states and 201 transitions. [2020-04-17 14:31:57,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 14:31:57,977 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-04-17 14:31:57,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:57,978 INFO L225 Difference]: With dead ends: 83 [2020-04-17 14:31:57,978 INFO L226 Difference]: Without dead ends: 77 [2020-04-17 14:31:57,978 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=381, Invalid=1025, Unknown=0, NotChecked=0, Total=1406 [2020-04-17 14:31:57,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-17 14:31:57,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2020-04-17 14:31:57,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 14:31:57,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-04-17 14:31:57,980 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-04-17 14:31:57,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:57,981 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-04-17 14:31:57,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:31:57,981 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-04-17 14:31:57,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 14:31:57,981 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:57,981 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:58,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:58,182 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:58,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:58,183 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-04-17 14:31:58,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:58,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857180561] [2020-04-17 14:31:58,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:58,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:58,276 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:58,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857180561] [2020-04-17 14:31:58,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654151801] [2020-04-17 14:31:58,276 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:58,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:58,320 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 14:31:58,321 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:58,333 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:58,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:58,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-04-17 14:31:58,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493077001] [2020-04-17 14:31:58,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 14:31:58,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:58,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 14:31:58,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-04-17 14:31:58,334 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-04-17 14:31:58,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:58,784 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-04-17 14:31:58,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 14:31:58,784 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-04-17 14:31:58,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:58,785 INFO L225 Difference]: With dead ends: 101 [2020-04-17 14:31:58,785 INFO L226 Difference]: Without dead ends: 95 [2020-04-17 14:31:58,786 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 14:31:58,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-04-17 14:31:58,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-04-17 14:31:58,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-04-17 14:31:58,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-04-17 14:31:58,788 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-04-17 14:31:58,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:58,789 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-04-17 14:31:58,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 14:31:58,789 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-04-17 14:31:58,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 14:31:58,789 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:58,790 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:58,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:58,993 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:58,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:58,993 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-04-17 14:31:58,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:58,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047098231] [2020-04-17 14:31:58,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:58,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:59,087 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:59,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047098231] [2020-04-17 14:31:59,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842803249] [2020-04-17 14:31:59,088 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:59,131 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:31:59,131 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:59,132 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 14:31:59,133 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:59,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:59,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-17 14:31:59,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24838608] [2020-04-17 14:31:59,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:31:59,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:59,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:31:59,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:31:59,160 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-04-17 14:31:59,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:59,693 INFO L93 Difference]: Finished difference Result 80 states and 197 transitions. [2020-04-17 14:31:59,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 14:31:59,694 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-04-17 14:31:59,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:59,695 INFO L225 Difference]: With dead ends: 80 [2020-04-17 14:31:59,695 INFO L226 Difference]: Without dead ends: 72 [2020-04-17 14:31:59,695 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=447, Invalid=1113, Unknown=0, NotChecked=0, Total=1560 [2020-04-17 14:31:59,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-04-17 14:31:59,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-04-17 14:31:59,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-04-17 14:31:59,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-04-17 14:31:59,697 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-04-17 14:31:59,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:59,697 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-04-17 14:31:59,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:31:59,698 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-04-17 14:31:59,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 14:31:59,698 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:59,698 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:59,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:59,899 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:59,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:59,900 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-04-17 14:31:59,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:59,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935733858] [2020-04-17 14:31:59,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:59,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:00,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935733858] [2020-04-17 14:32:00,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181000031] [2020-04-17 14:32:00,006 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:00,055 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-04-17 14:32:00,055 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:00,056 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 14:32:00,056 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:00,070 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:00,081 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:00,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:00,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-17 14:32:00,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293661615] [2020-04-17 14:32:00,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:32:00,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:00,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:32:00,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:32:00,082 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-04-17 14:32:00,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:00,652 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-04-17 14:32:00,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 14:32:00,653 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-04-17 14:32:00,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:00,654 INFO L225 Difference]: With dead ends: 92 [2020-04-17 14:32:00,654 INFO L226 Difference]: Without dead ends: 87 [2020-04-17 14:32:00,654 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-04-17 14:32:00,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-04-17 14:32:00,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-04-17 14:32:00,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-04-17 14:32:00,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-04-17 14:32:00,657 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-04-17 14:32:00,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:00,657 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-04-17 14:32:00,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:32:00,657 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-04-17 14:32:00,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 14:32:00,658 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:00,658 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:00,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:00,859 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:00,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:00,859 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-04-17 14:32:00,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:00,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474950848] [2020-04-17 14:32:00,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:00,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:00,975 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:00,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474950848] [2020-04-17 14:32:00,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710505978] [2020-04-17 14:32:00,976 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:01,023 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:32:01,024 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:01,025 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 14:32:01,025 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:01,039 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:01,050 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:01,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:01,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 14:32:01,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116481019] [2020-04-17 14:32:01,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:32:01,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:01,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:32:01,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:32:01,051 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-04-17 14:32:01,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:01,656 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-04-17 14:32:01,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 14:32:01,657 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 14:32:01,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:01,658 INFO L225 Difference]: With dead ends: 78 [2020-04-17 14:32:01,658 INFO L226 Difference]: Without dead ends: 73 [2020-04-17 14:32:01,658 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-04-17 14:32:01,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-04-17 14:32:01,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-04-17 14:32:01,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-04-17 14:32:01,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-04-17 14:32:01,661 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-04-17 14:32:01,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:01,661 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-04-17 14:32:01,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:32:01,662 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-04-17 14:32:01,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 14:32:01,662 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:01,662 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:01,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:01,865 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:01,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:01,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-04-17 14:32:01,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:01,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267133251] [2020-04-17 14:32:01,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:02,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267133251] [2020-04-17 14:32:02,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88010818] [2020-04-17 14:32:02,014 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:02,063 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-04-17 14:32:02,063 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:02,065 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 14:32:02,065 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:02,071 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:02,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:02,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-04-17 14:32:02,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661095779] [2020-04-17 14:32:02,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:32:02,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:02,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:32:02,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:32:02,072 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-04-17 14:32:02,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:02,333 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-04-17 14:32:02,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 14:32:02,333 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-04-17 14:32:02,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:02,334 INFO L225 Difference]: With dead ends: 84 [2020-04-17 14:32:02,334 INFO L226 Difference]: Without dead ends: 78 [2020-04-17 14:32:02,335 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-04-17 14:32:02,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-04-17 14:32:02,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-04-17 14:32:02,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 14:32:02,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-04-17 14:32:02,337 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-04-17 14:32:02,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:02,337 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-04-17 14:32:02,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:32:02,337 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-04-17 14:32:02,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 14:32:02,338 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:02,338 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:02,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:02,538 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:02,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:02,539 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-04-17 14:32:02,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:02,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938014630] [2020-04-17 14:32:02,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:02,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:02,679 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:02,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938014630] [2020-04-17 14:32:02,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185000306] [2020-04-17 14:32:02,680 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:02,730 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-04-17 14:32:02,731 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:02,732 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 14:32:02,733 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:02,745 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:02,751 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:02,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:02,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 14:32:02,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688565222] [2020-04-17 14:32:02,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:32:02,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:02,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:32:02,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:32:02,752 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-04-17 14:32:03,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:03,059 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-04-17 14:32:03,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 14:32:03,060 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 14:32:03,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:03,061 INFO L225 Difference]: With dead ends: 98 [2020-04-17 14:32:03,061 INFO L226 Difference]: Without dead ends: 92 [2020-04-17 14:32:03,062 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-04-17 14:32:03,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-04-17 14:32:03,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-04-17 14:32:03,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-04-17 14:32:03,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-04-17 14:32:03,064 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-04-17 14:32:03,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:03,064 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-04-17 14:32:03,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:32:03,065 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-04-17 14:32:03,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 14:32:03,065 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:03,065 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:03,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:03,266 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:03,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:03,266 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-04-17 14:32:03,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:03,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299201720] [2020-04-17 14:32:03,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:03,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:03,411 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:03,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299201720] [2020-04-17 14:32:03,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408256858] [2020-04-17 14:32:03,411 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:03,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:03,457 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 14:32:03,458 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:03,465 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:03,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:03,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-04-17 14:32:03,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538836008] [2020-04-17 14:32:03,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:32:03,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:03,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:32:03,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:32:03,467 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-04-17 14:32:03,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:03,812 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-04-17 14:32:03,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 14:32:03,813 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-04-17 14:32:03,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:03,814 INFO L225 Difference]: With dead ends: 99 [2020-04-17 14:32:03,814 INFO L226 Difference]: Without dead ends: 93 [2020-04-17 14:32:03,814 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 14:32:03,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-04-17 14:32:03,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-04-17 14:32:03,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-17 14:32:03,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-04-17 14:32:03,817 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-04-17 14:32:03,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:03,817 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-04-17 14:32:03,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:32:03,817 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-04-17 14:32:03,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 14:32:03,818 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:03,818 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:04,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:04,018 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:04,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:04,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-04-17 14:32:04,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:04,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580684390] [2020-04-17 14:32:04,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:04,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:04,188 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:04,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580684390] [2020-04-17 14:32:04,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161028486] [2020-04-17 14:32:04,189 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:04,234 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:32:04,235 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:04,236 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 14:32:04,236 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:04,249 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:04,258 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:04,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:04,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 14:32:04,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231906295] [2020-04-17 14:32:04,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:32:04,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:04,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:32:04,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:32:04,260 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-04-17 14:32:04,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:04,710 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-04-17 14:32:04,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 14:32:04,710 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 14:32:04,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:04,712 INFO L225 Difference]: With dead ends: 109 [2020-04-17 14:32:04,712 INFO L226 Difference]: Without dead ends: 103 [2020-04-17 14:32:04,712 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-04-17 14:32:04,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-04-17 14:32:04,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-04-17 14:32:04,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 14:32:04,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-04-17 14:32:04,715 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-04-17 14:32:04,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:04,716 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-04-17 14:32:04,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:32:04,716 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-04-17 14:32:04,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 14:32:04,716 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:04,717 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:04,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:04,921 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:04,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:04,922 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-04-17 14:32:04,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:04,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616448728] [2020-04-17 14:32:04,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:04,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:05,150 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:05,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616448728] [2020-04-17 14:32:05,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463547545] [2020-04-17 14:32:05,151 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:05,245 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-04-17 14:32:05,245 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:05,246 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 14:32:05,247 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:05,274 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:05,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:05,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-04-17 14:32:05,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304111397] [2020-04-17 14:32:05,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:32:05,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:05,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:32:05,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:32:05,277 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-04-17 14:32:05,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:05,708 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-04-17 14:32:05,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 14:32:05,708 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-04-17 14:32:05,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:05,709 INFO L225 Difference]: With dead ends: 109 [2020-04-17 14:32:05,709 INFO L226 Difference]: Without dead ends: 103 [2020-04-17 14:32:05,710 INFO L678 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 [2020-04-17 14:32:05,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-04-17 14:32:05,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-04-17 14:32:05,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-04-17 14:32:05,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-04-17 14:32:05,712 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-04-17 14:32:05,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:05,712 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-04-17 14:32:05,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:32:05,713 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-04-17 14:32:05,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 14:32:05,713 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:05,713 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:05,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:05,916 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:05,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:05,917 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-04-17 14:32:05,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:05,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77258087] [2020-04-17 14:32:05,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:05,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:06,048 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:06,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77258087] [2020-04-17 14:32:06,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743412792] [2020-04-17 14:32:06,049 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:06,099 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:32:06,100 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:06,101 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 14:32:06,102 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:06,115 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:06,124 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:06,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:06,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 14:32:06,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097871861] [2020-04-17 14:32:06,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:32:06,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:06,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:32:06,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:32:06,125 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-04-17 14:32:06,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:06,566 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-04-17 14:32:06,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 14:32:06,566 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 14:32:06,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:06,567 INFO L225 Difference]: With dead ends: 106 [2020-04-17 14:32:06,567 INFO L226 Difference]: Without dead ends: 100 [2020-04-17 14:32:06,567 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 14:32:06,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-04-17 14:32:06,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-04-17 14:32:06,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 14:32:06,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-04-17 14:32:06,569 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-04-17 14:32:06,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:06,569 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-04-17 14:32:06,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:32:06,569 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-04-17 14:32:06,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 14:32:06,570 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:06,570 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:06,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:06,773 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:06,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:06,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-04-17 14:32:06,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:06,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774218612] [2020-04-17 14:32:06,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:06,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:06,891 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:06,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774218612] [2020-04-17 14:32:06,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634614765] [2020-04-17 14:32:06,892 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:06,942 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-04-17 14:32:06,942 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:06,943 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 14:32:06,944 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:06,962 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:06,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:06,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-04-17 14:32:06,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543118168] [2020-04-17 14:32:06,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:32:06,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:06,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:32:06,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:32:06,964 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-04-17 14:32:07,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:07,366 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-04-17 14:32:07,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 14:32:07,366 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-04-17 14:32:07,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:07,367 INFO L225 Difference]: With dead ends: 107 [2020-04-17 14:32:07,367 INFO L226 Difference]: Without dead ends: 101 [2020-04-17 14:32:07,368 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-04-17 14:32:07,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-04-17 14:32:07,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-04-17 14:32:07,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-04-17 14:32:07,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-04-17 14:32:07,370 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-04-17 14:32:07,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:07,371 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-04-17 14:32:07,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:32:07,371 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-04-17 14:32:07,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 14:32:07,371 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:07,372 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:07,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:07,575 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:07,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:07,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-04-17 14:32:07,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:07,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338154852] [2020-04-17 14:32:07,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:07,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:07,707 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:07,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338154852] [2020-04-17 14:32:07,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984598210] [2020-04-17 14:32:07,708 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:07,758 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-04-17 14:32:07,759 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:07,759 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 14:32:07,760 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:07,775 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:07,784 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:07,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:07,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 14:32:07,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445690229] [2020-04-17 14:32:07,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:32:07,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:07,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:32:07,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:32:07,785 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-04-17 14:32:08,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:08,284 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-04-17 14:32:08,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 14:32:08,284 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 14:32:08,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:08,285 INFO L225 Difference]: With dead ends: 104 [2020-04-17 14:32:08,285 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 14:32:08,286 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 14:32:08,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 14:32:08,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-04-17 14:32:08,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-17 14:32:08,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-04-17 14:32:08,289 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-04-17 14:32:08,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:08,289 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-04-17 14:32:08,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:32:08,290 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-04-17 14:32:08,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 14:32:08,290 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:08,290 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:08,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:08,493 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:08,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:08,494 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-04-17 14:32:08,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:08,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051484849] [2020-04-17 14:32:08,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:08,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:08,612 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:08,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051484849] [2020-04-17 14:32:08,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077720674] [2020-04-17 14:32:08,612 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:08,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:08,658 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 14:32:08,659 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:08,671 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:08,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:08,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-04-17 14:32:08,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174409203] [2020-04-17 14:32:08,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:32:08,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:08,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:32:08,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:32:08,672 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-04-17 14:32:09,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:09,106 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-04-17 14:32:09,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 14:32:09,106 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-04-17 14:32:09,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:09,107 INFO L225 Difference]: With dead ends: 105 [2020-04-17 14:32:09,107 INFO L226 Difference]: Without dead ends: 99 [2020-04-17 14:32:09,108 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-04-17 14:32:09,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-04-17 14:32:09,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-04-17 14:32:09,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 14:32:09,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-04-17 14:32:09,111 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-04-17 14:32:09,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:09,112 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-04-17 14:32:09,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:32:09,112 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-04-17 14:32:09,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 14:32:09,112 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:09,112 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:09,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:09,316 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:09,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:09,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-04-17 14:32:09,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:09,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236337213] [2020-04-17 14:32:09,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:09,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:09,438 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:09,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236337213] [2020-04-17 14:32:09,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648381836] [2020-04-17 14:32:09,439 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:09,483 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:32:09,483 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:09,488 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 14:32:09,489 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:09,517 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:09,526 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:09,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:09,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 14:32:09,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410348244] [2020-04-17 14:32:09,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:32:09,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:09,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:32:09,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:32:09,528 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-04-17 14:32:10,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:10,069 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-04-17 14:32:10,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 14:32:10,069 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 14:32:10,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:10,070 INFO L225 Difference]: With dead ends: 102 [2020-04-17 14:32:10,070 INFO L226 Difference]: Without dead ends: 96 [2020-04-17 14:32:10,070 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-04-17 14:32:10,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-04-17 14:32:10,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-04-17 14:32:10,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 14:32:10,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-04-17 14:32:10,073 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-04-17 14:32:10,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:10,075 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-04-17 14:32:10,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:32:10,075 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-04-17 14:32:10,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 14:32:10,076 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:10,076 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:10,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:10,279 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:10,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:10,280 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-04-17 14:32:10,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:10,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913489597] [2020-04-17 14:32:10,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:10,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:10,396 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:10,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913489597] [2020-04-17 14:32:10,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018520581] [2020-04-17 14:32:10,396 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:10,445 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-04-17 14:32:10,445 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:10,446 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:32:10,446 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:10,456 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:10,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:10,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-04-17 14:32:10,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488819623] [2020-04-17 14:32:10,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:32:10,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:10,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:32:10,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:32:10,457 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-04-17 14:32:10,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:10,942 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-04-17 14:32:10,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 14:32:10,943 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-04-17 14:32:10,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:10,944 INFO L225 Difference]: With dead ends: 103 [2020-04-17 14:32:10,944 INFO L226 Difference]: Without dead ends: 97 [2020-04-17 14:32:10,944 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-04-17 14:32:10,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-04-17 14:32:10,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-04-17 14:32:10,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-04-17 14:32:10,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-04-17 14:32:10,946 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-04-17 14:32:10,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:10,947 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-04-17 14:32:10,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:32:10,947 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-04-17 14:32:10,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 14:32:10,947 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:10,947 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:11,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:11,150 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:11,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:11,151 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-04-17 14:32:11,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:11,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392223908] [2020-04-17 14:32:11,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:11,327 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:11,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392223908] [2020-04-17 14:32:11,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710654944] [2020-04-17 14:32:11,327 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:11,383 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:32:11,383 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:11,384 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 14:32:11,385 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:11,404 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:11,415 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:11,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:11,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 14:32:11,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422092615] [2020-04-17 14:32:11,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:32:11,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:11,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:32:11,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:32:11,417 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-04-17 14:32:12,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:12,039 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-04-17 14:32:12,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 14:32:12,039 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 14:32:12,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:12,040 INFO L225 Difference]: With dead ends: 100 [2020-04-17 14:32:12,040 INFO L226 Difference]: Without dead ends: 94 [2020-04-17 14:32:12,040 INFO L678 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 [2020-04-17 14:32:12,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-04-17 14:32:12,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-04-17 14:32:12,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-04-17 14:32:12,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-04-17 14:32:12,043 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-04-17 14:32:12,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:12,043 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-04-17 14:32:12,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:32:12,043 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-04-17 14:32:12,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 14:32:12,043 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:12,043 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:12,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:12,244 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:12,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:12,245 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-04-17 14:32:12,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:12,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584904553] [2020-04-17 14:32:12,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:12,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:12,351 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:12,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584904553] [2020-04-17 14:32:12,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824508887] [2020-04-17 14:32:12,352 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:12,404 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-04-17 14:32:12,405 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:12,406 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 14:32:12,407 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:12,427 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:12,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:12,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-04-17 14:32:12,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146839193] [2020-04-17 14:32:12,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:32:12,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:12,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:32:12,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:32:12,429 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-04-17 14:32:13,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:13,113 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-04-17 14:32:13,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 14:32:13,114 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-04-17 14:32:13,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:13,115 INFO L225 Difference]: With dead ends: 120 [2020-04-17 14:32:13,115 INFO L226 Difference]: Without dead ends: 114 [2020-04-17 14:32:13,116 INFO L678 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 [2020-04-17 14:32:13,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-04-17 14:32:13,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-04-17 14:32:13,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-17 14:32:13,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-04-17 14:32:13,118 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-04-17 14:32:13,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:13,119 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-04-17 14:32:13,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:32:13,119 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-04-17 14:32:13,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 14:32:13,120 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:13,120 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:13,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:13,321 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:13,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:13,321 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-04-17 14:32:13,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:13,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518447071] [2020-04-17 14:32:13,322 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:13,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:13,487 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:13,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518447071] [2020-04-17 14:32:13,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993110384] [2020-04-17 14:32:13,488 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:13,539 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-04-17 14:32:13,540 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:13,541 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:32:13,541 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:13,575 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:13,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:13,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 14:32:13,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046034465] [2020-04-17 14:32:13,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:32:13,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:13,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:32:13,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:32:13,576 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-04-17 14:32:14,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:14,197 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-04-17 14:32:14,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 14:32:14,198 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 14:32:14,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:14,198 INFO L225 Difference]: With dead ends: 101 [2020-04-17 14:32:14,199 INFO L226 Difference]: Without dead ends: 93 [2020-04-17 14:32:14,199 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=575, Invalid=1405, Unknown=0, NotChecked=0, Total=1980 [2020-04-17 14:32:14,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-04-17 14:32:14,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-04-17 14:32:14,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-04-17 14:32:14,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-04-17 14:32:14,201 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-04-17 14:32:14,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:14,201 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-04-17 14:32:14,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:32:14,201 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-04-17 14:32:14,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 14:32:14,202 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:14,202 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:14,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:14,403 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:14,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:14,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-04-17 14:32:14,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:14,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754774324] [2020-04-17 14:32:14,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:14,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:14,559 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:14,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754774324] [2020-04-17 14:32:14,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268466263] [2020-04-17 14:32:14,560 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:14,607 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:32:14,608 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:14,615 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:14,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:14,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-04-17 14:32:14,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550914197] [2020-04-17 14:32:14,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:32:14,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:14,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:32:14,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:32:14,617 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-04-17 14:32:14,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:14,918 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-04-17 14:32:14,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 14:32:14,919 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-04-17 14:32:14,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:14,919 INFO L225 Difference]: With dead ends: 114 [2020-04-17 14:32:14,919 INFO L226 Difference]: Without dead ends: 108 [2020-04-17 14:32:14,920 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 14:32:14,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-04-17 14:32:14,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-04-17 14:32:14,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 14:32:14,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-04-17 14:32:14,922 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-04-17 14:32:14,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:14,922 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-04-17 14:32:14,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:32:14,922 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-04-17 14:32:14,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 14:32:14,923 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:14,923 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:15,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:15,126 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:15,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:15,127 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-04-17 14:32:15,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:15,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866931668] [2020-04-17 14:32:15,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:15,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:15,279 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:15,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866931668] [2020-04-17 14:32:15,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774213076] [2020-04-17 14:32:15,279 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:15,326 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:32:15,326 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:15,326 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:32:15,327 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:15,340 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:15,347 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:15,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:15,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 14:32:15,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086457814] [2020-04-17 14:32:15,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 14:32:15,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:15,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 14:32:15,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:32:15,348 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-04-17 14:32:15,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:15,695 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-04-17 14:32:15,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 14:32:15,696 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 14:32:15,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:15,696 INFO L225 Difference]: With dead ends: 111 [2020-04-17 14:32:15,696 INFO L226 Difference]: Without dead ends: 105 [2020-04-17 14:32:15,697 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 14:32:15,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-04-17 14:32:15,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-04-17 14:32:15,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 14:32:15,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-04-17 14:32:15,700 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-04-17 14:32:15,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:15,700 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-04-17 14:32:15,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 14:32:15,701 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-04-17 14:32:15,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 14:32:15,701 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:15,701 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:15,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:15,904 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:15,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:15,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-04-17 14:32:15,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:15,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093888749] [2020-04-17 14:32:15,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:15,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:16,130 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:16,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093888749] [2020-04-17 14:32:16,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705056885] [2020-04-17 14:32:16,131 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:16,211 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-04-17 14:32:16,211 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:16,212 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:32:16,213 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:16,238 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:16,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:16,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-04-17 14:32:16,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092528570] [2020-04-17 14:32:16,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:32:16,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:16,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:32:16,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:32:16,240 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-04-17 14:32:16,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:16,624 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-04-17 14:32:16,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 14:32:16,624 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-04-17 14:32:16,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:16,625 INFO L225 Difference]: With dead ends: 108 [2020-04-17 14:32:16,625 INFO L226 Difference]: Without dead ends: 102 [2020-04-17 14:32:16,625 INFO L678 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 [2020-04-17 14:32:16,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-04-17 14:32:16,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-04-17 14:32:16,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 14:32:16,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-04-17 14:32:16,627 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-04-17 14:32:16,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:16,627 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-04-17 14:32:16,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:32:16,628 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-04-17 14:32:16,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 14:32:16,628 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:16,628 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:16,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:16,832 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:16,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:16,832 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-04-17 14:32:16,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:16,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751164133] [2020-04-17 14:32:16,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:16,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:16,979 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:16,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751164133] [2020-04-17 14:32:16,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103390938] [2020-04-17 14:32:16,980 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:17,025 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:32:17,025 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:17,026 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:32:17,026 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:17,041 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:17,048 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:17,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:17,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 14:32:17,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220164153] [2020-04-17 14:32:17,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 14:32:17,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:17,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 14:32:17,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:32:17,049 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-04-17 14:32:17,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:17,494 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-04-17 14:32:17,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 14:32:17,495 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 14:32:17,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:17,495 INFO L225 Difference]: With dead ends: 107 [2020-04-17 14:32:17,496 INFO L226 Difference]: Without dead ends: 101 [2020-04-17 14:32:17,496 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-04-17 14:32:17,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-04-17 14:32:17,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-04-17 14:32:17,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 14:32:17,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-04-17 14:32:17,498 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-04-17 14:32:17,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:17,498 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-04-17 14:32:17,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 14:32:17,499 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-04-17 14:32:17,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 14:32:17,499 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:17,499 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:17,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:17,702 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:17,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:17,702 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-04-17 14:32:17,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:17,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584017585] [2020-04-17 14:32:17,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:17,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:17,844 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:17,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584017585] [2020-04-17 14:32:17,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74499140] [2020-04-17 14:32:17,845 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:17,894 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-04-17 14:32:17,895 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:17,896 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:32:17,896 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:17,905 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:17,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:17,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-04-17 14:32:17,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974104703] [2020-04-17 14:32:17,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:32:17,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:17,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:32:17,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:32:17,907 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-04-17 14:32:18,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:18,277 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-04-17 14:32:18,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 14:32:18,278 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-04-17 14:32:18,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:18,278 INFO L225 Difference]: With dead ends: 104 [2020-04-17 14:32:18,278 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 14:32:18,279 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 14:32:18,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 14:32:18,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-04-17 14:32:18,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 14:32:18,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-04-17 14:32:18,283 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-04-17 14:32:18,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:18,283 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-04-17 14:32:18,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:32:18,283 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-04-17 14:32:18,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 14:32:18,284 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:18,284 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:18,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:18,487 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:18,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:18,487 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-04-17 14:32:18,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:18,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346368886] [2020-04-17 14:32:18,488 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:18,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:18,626 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:18,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346368886] [2020-04-17 14:32:18,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659431147] [2020-04-17 14:32:18,627 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:18,677 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-04-17 14:32:18,678 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:18,679 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:32:18,680 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:18,694 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:18,702 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:18,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:18,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 14:32:18,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20464887] [2020-04-17 14:32:18,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 14:32:18,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:18,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 14:32:18,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:32:18,704 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-04-17 14:32:19,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:19,223 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-04-17 14:32:19,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 14:32:19,223 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 14:32:19,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:19,224 INFO L225 Difference]: With dead ends: 103 [2020-04-17 14:32:19,224 INFO L226 Difference]: Without dead ends: 97 [2020-04-17 14:32:19,225 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-04-17 14:32:19,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-04-17 14:32:19,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-04-17 14:32:19,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 14:32:19,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-04-17 14:32:19,228 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-04-17 14:32:19,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:19,228 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-04-17 14:32:19,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 14:32:19,228 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-04-17 14:32:19,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 14:32:19,228 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:19,229 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:19,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:19,432 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:19,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:19,432 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-04-17 14:32:19,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:19,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263394674] [2020-04-17 14:32:19,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:19,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:19,563 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:19,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263394674] [2020-04-17 14:32:19,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729114546] [2020-04-17 14:32:19,564 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:19,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:19,615 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:32:19,615 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:19,625 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:19,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:19,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-04-17 14:32:19,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359516580] [2020-04-17 14:32:19,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:32:19,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:19,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:32:19,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:32:19,626 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-04-17 14:32:20,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:20,059 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-04-17 14:32:20,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 14:32:20,059 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-04-17 14:32:20,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:20,060 INFO L225 Difference]: With dead ends: 100 [2020-04-17 14:32:20,060 INFO L226 Difference]: Without dead ends: 94 [2020-04-17 14:32:20,061 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 14:32:20,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-04-17 14:32:20,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-04-17 14:32:20,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 14:32:20,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-04-17 14:32:20,063 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-04-17 14:32:20,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:20,064 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-04-17 14:32:20,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:32:20,064 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-04-17 14:32:20,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 14:32:20,065 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:20,065 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:20,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:20,268 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:20,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:20,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-04-17 14:32:20,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:20,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310762737] [2020-04-17 14:32:20,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:20,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:20,422 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:20,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310762737] [2020-04-17 14:32:20,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974607264] [2020-04-17 14:32:20,423 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:20,469 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:32:20,469 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:20,470 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:32:20,470 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:20,485 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,493 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:20,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:20,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 14:32:20,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174975607] [2020-04-17 14:32:20,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 14:32:20,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:20,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 14:32:20,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:32:20,495 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-04-17 14:32:21,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:21,058 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-04-17 14:32:21,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 14:32:21,059 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 14:32:21,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:21,060 INFO L225 Difference]: With dead ends: 99 [2020-04-17 14:32:21,060 INFO L226 Difference]: Without dead ends: 93 [2020-04-17 14:32:21,061 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-04-17 14:32:21,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-04-17 14:32:21,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-04-17 14:32:21,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 14:32:21,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-04-17 14:32:21,063 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-04-17 14:32:21,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:21,063 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-04-17 14:32:21,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 14:32:21,063 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-04-17 14:32:21,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 14:32:21,064 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:21,064 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:21,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:21,264 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:21,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:21,265 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-04-17 14:32:21,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:21,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150979309] [2020-04-17 14:32:21,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:21,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:21,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150979309] [2020-04-17 14:32:21,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285706199] [2020-04-17 14:32:21,389 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:21,441 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-04-17 14:32:21,441 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:21,442 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:32:21,443 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:21,456 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:21,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:21,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-04-17 14:32:21,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825148472] [2020-04-17 14:32:21,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:32:21,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:21,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:32:21,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:32:21,457 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-04-17 14:32:21,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:21,922 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-04-17 14:32:21,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 14:32:21,923 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-04-17 14:32:21,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:21,923 INFO L225 Difference]: With dead ends: 96 [2020-04-17 14:32:21,924 INFO L226 Difference]: Without dead ends: 90 [2020-04-17 14:32:21,924 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-04-17 14:32:21,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-04-17 14:32:21,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-04-17 14:32:21,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 14:32:21,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-04-17 14:32:21,927 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-04-17 14:32:21,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:21,927 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-04-17 14:32:21,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:32:21,927 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-04-17 14:32:21,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 14:32:21,928 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:21,928 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:22,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:22,131 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:22,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:22,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-04-17 14:32:22,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:22,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868725116] [2020-04-17 14:32:22,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:22,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:22,290 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:22,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868725116] [2020-04-17 14:32:22,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433922967] [2020-04-17 14:32:22,291 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:22,339 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:32:22,340 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:22,341 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:32:22,341 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:22,355 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:22,364 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:22,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:22,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 14:32:22,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169026930] [2020-04-17 14:32:22,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 14:32:22,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:22,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 14:32:22,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:32:22,366 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-04-17 14:32:23,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:23,015 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-04-17 14:32:23,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 14:32:23,015 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 14:32:23,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:23,016 INFO L225 Difference]: With dead ends: 95 [2020-04-17 14:32:23,016 INFO L226 Difference]: Without dead ends: 89 [2020-04-17 14:32:23,016 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-04-17 14:32:23,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-04-17 14:32:23,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-04-17 14:32:23,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 14:32:23,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-04-17 14:32:23,018 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-04-17 14:32:23,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:23,019 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-04-17 14:32:23,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 14:32:23,019 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-04-17 14:32:23,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 14:32:23,019 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:23,019 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:23,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:23,223 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:23,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:23,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-04-17 14:32:23,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:23,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437118429] [2020-04-17 14:32:23,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:23,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:23,396 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:23,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437118429] [2020-04-17 14:32:23,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576866480] [2020-04-17 14:32:23,397 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:23,484 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-04-17 14:32:23,484 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:23,485 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:32:23,486 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:23,506 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:23,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:23,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-04-17 14:32:23,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029066978] [2020-04-17 14:32:23,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:32:23,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:23,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:32:23,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:32:23,508 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-04-17 14:32:24,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:24,142 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-04-17 14:32:24,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 14:32:24,142 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-04-17 14:32:24,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:24,143 INFO L225 Difference]: With dead ends: 92 [2020-04-17 14:32:24,143 INFO L226 Difference]: Without dead ends: 86 [2020-04-17 14:32:24,143 INFO L678 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 [2020-04-17 14:32:24,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-04-17 14:32:24,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-04-17 14:32:24,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 14:32:24,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-04-17 14:32:24,146 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-04-17 14:32:24,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:24,146 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-04-17 14:32:24,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:32:24,146 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-04-17 14:32:24,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 14:32:24,146 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:24,147 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:24,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:24,350 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:24,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:24,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-04-17 14:32:24,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:24,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671406082] [2020-04-17 14:32:24,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:24,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:24,471 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:24,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671406082] [2020-04-17 14:32:24,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208192006] [2020-04-17 14:32:24,472 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:24,524 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-04-17 14:32:24,524 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:24,525 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:32:24,526 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:24,557 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:24,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:24,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 14:32:24,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11050160] [2020-04-17 14:32:24,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 14:32:24,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:24,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 14:32:24,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:32:24,558 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-04-17 14:32:25,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:25,170 INFO L93 Difference]: Finished difference Result 89 states and 217 transitions. [2020-04-17 14:32:25,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 14:32:25,171 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 14:32:25,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:25,171 INFO L225 Difference]: With dead ends: 89 [2020-04-17 14:32:25,171 INFO L226 Difference]: Without dead ends: 83 [2020-04-17 14:32:25,172 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=510, Invalid=1382, Unknown=0, NotChecked=0, Total=1892 [2020-04-17 14:32:25,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-04-17 14:32:25,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74. [2020-04-17 14:32:25,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 14:32:25,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-04-17 14:32:25,174 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-04-17 14:32:25,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:25,174 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-04-17 14:32:25,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 14:32:25,174 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-04-17 14:32:25,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 14:32:25,175 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:25,175 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:25,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:25,376 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:25,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:25,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-04-17 14:32:25,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:25,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454615917] [2020-04-17 14:32:25,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:25,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:25,542 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:25,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454615917] [2020-04-17 14:32:25,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699743021] [2020-04-17 14:32:25,543 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:25,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:25,619 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:32:25,621 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:25,643 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:25,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:25,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-04-17 14:32:25,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890748491] [2020-04-17 14:32:25,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:32:25,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:25,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:32:25,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:32:25,645 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-04-17 14:32:26,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:26,274 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-04-17 14:32:26,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 14:32:26,274 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-04-17 14:32:26,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:26,275 INFO L225 Difference]: With dead ends: 107 [2020-04-17 14:32:26,275 INFO L226 Difference]: Without dead ends: 101 [2020-04-17 14:32:26,276 INFO L678 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 [2020-04-17 14:32:26,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-04-17 14:32:26,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-04-17 14:32:26,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-04-17 14:32:26,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-04-17 14:32:26,278 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-04-17 14:32:26,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:26,279 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-04-17 14:32:26,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:32:26,279 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-04-17 14:32:26,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 14:32:26,280 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:26,280 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:26,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:26,483 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:26,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:26,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-04-17 14:32:26,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:26,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496032802] [2020-04-17 14:32:26,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:26,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:26,660 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:26,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496032802] [2020-04-17 14:32:26,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556464384] [2020-04-17 14:32:26,661 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:26,737 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:32:26,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:26,739 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 14:32:26,740 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:26,791 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:26,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:26,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 14:32:26,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135299523] [2020-04-17 14:32:26,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 14:32:26,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:26,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 14:32:26,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:32:26,794 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-04-17 14:32:27,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:27,538 INFO L93 Difference]: Finished difference Result 86 states and 213 transitions. [2020-04-17 14:32:27,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 14:32:27,539 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 14:32:27,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:27,540 INFO L225 Difference]: With dead ends: 86 [2020-04-17 14:32:27,540 INFO L226 Difference]: Without dead ends: 78 [2020-04-17 14:32:27,540 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=587, Invalid=1483, Unknown=0, NotChecked=0, Total=2070 [2020-04-17 14:32:27,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-04-17 14:32:27,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-04-17 14:32:27,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-17 14:32:27,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-04-17 14:32:27,542 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-04-17 14:32:27,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:27,542 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-04-17 14:32:27,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 14:32:27,543 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-04-17 14:32:27,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 14:32:27,543 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:27,543 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:27,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:27,744 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:27,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:27,744 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-04-17 14:32:27,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:27,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808724747] [2020-04-17 14:32:27,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:27,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:27,854 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:27,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808724747] [2020-04-17 14:32:27,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701336347] [2020-04-17 14:32:27,855 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:27,904 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-04-17 14:32:27,904 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:27,905 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:32:27,906 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:27,922 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:27,933 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:27,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:27,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 14:32:27,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065276024] [2020-04-17 14:32:27,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 14:32:27,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:27,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 14:32:27,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:32:27,934 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-04-17 14:32:28,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:28,587 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-04-17 14:32:28,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 14:32:28,588 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 14:32:28,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:28,588 INFO L225 Difference]: With dead ends: 100 [2020-04-17 14:32:28,589 INFO L226 Difference]: Without dead ends: 95 [2020-04-17 14:32:28,589 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-04-17 14:32:28,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-04-17 14:32:28,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-04-17 14:32:28,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-17 14:32:28,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-04-17 14:32:28,591 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-04-17 14:32:28,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:28,591 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-04-17 14:32:28,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 14:32:28,592 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-04-17 14:32:28,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 14:32:28,592 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:28,592 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:28,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:28,793 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:28,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:28,793 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-04-17 14:32:28,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:28,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134905567] [2020-04-17 14:32:28,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:28,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:28,929 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:28,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134905567] [2020-04-17 14:32:28,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940347511] [2020-04-17 14:32:28,930 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:28,975 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:32:28,975 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:28,976 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 14:32:28,976 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:28,990 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:29,002 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:29,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:29,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 14:32:29,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588776423] [2020-04-17 14:32:29,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 14:32:29,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:29,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 14:32:29,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:32:29,003 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-04-17 14:32:29,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:29,712 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-04-17 14:32:29,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 14:32:29,712 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 14:32:29,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:29,713 INFO L225 Difference]: With dead ends: 84 [2020-04-17 14:32:29,713 INFO L226 Difference]: Without dead ends: 79 [2020-04-17 14:32:29,713 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-04-17 14:32:29,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-04-17 14:32:29,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-04-17 14:32:29,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 14:32:29,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-04-17 14:32:29,715 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-04-17 14:32:29,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:29,716 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-04-17 14:32:29,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 14:32:29,716 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-04-17 14:32:29,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 14:32:29,716 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:29,716 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:29,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:29,917 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:29,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:29,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-04-17 14:32:29,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:29,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238010214] [2020-04-17 14:32:29,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:29,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:30,093 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:30,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238010214] [2020-04-17 14:32:30,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20374500] [2020-04-17 14:32:30,094 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:30,148 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-04-17 14:32:30,148 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:30,149 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 14:32:30,150 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:30,177 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:30,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:30,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 14:32:30,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528375333] [2020-04-17 14:32:30,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 14:32:30,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:30,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 14:32:30,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:32:30,178 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-04-17 14:32:30,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:30,479 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-04-17 14:32:30,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 14:32:30,479 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 14:32:30,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:30,480 INFO L225 Difference]: With dead ends: 90 [2020-04-17 14:32:30,480 INFO L226 Difference]: Without dead ends: 84 [2020-04-17 14:32:30,481 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 14:32:30,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-04-17 14:32:30,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-04-17 14:32:30,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-17 14:32:30,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-04-17 14:32:30,482 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-04-17 14:32:30,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:30,483 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-04-17 14:32:30,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 14:32:30,483 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-04-17 14:32:30,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 14:32:30,483 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:30,483 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:30,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:30,685 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:30,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:30,685 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-04-17 14:32:30,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:30,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517924761] [2020-04-17 14:32:30,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:30,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:30,868 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:30,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517924761] [2020-04-17 14:32:30,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942033178] [2020-04-17 14:32:30,869 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:30,916 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-04-17 14:32:30,916 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:30,917 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 14:32:30,918 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:30,936 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:30,943 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:30,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:30,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 14:32:30,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990015743] [2020-04-17 14:32:30,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 14:32:30,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:30,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 14:32:30,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:32:30,944 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-04-17 14:32:31,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:31,277 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-04-17 14:32:31,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 14:32:31,283 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 14:32:31,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:31,284 INFO L225 Difference]: With dead ends: 106 [2020-04-17 14:32:31,284 INFO L226 Difference]: Without dead ends: 100 [2020-04-17 14:32:31,284 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 14:32:31,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-04-17 14:32:31,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-04-17 14:32:31,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 14:32:31,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-04-17 14:32:31,287 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-04-17 14:32:31,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:31,287 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-04-17 14:32:31,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 14:32:31,287 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-04-17 14:32:31,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 14:32:31,287 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:31,287 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:31,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:31,491 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:31,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:31,491 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-04-17 14:32:31,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:31,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585446508] [2020-04-17 14:32:31,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:31,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:31,717 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:31,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585446508] [2020-04-17 14:32:31,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513723685] [2020-04-17 14:32:31,718 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:31,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:31,791 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 14:32:31,792 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:31,813 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:31,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:31,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 14:32:31,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665462857] [2020-04-17 14:32:31,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 14:32:31,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:31,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 14:32:31,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:32:31,816 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-04-17 14:32:32,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:32,191 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-04-17 14:32:32,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 14:32:32,192 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 14:32:32,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:32,192 INFO L225 Difference]: With dead ends: 107 [2020-04-17 14:32:32,192 INFO L226 Difference]: Without dead ends: 101 [2020-04-17 14:32:32,193 INFO L678 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 [2020-04-17 14:32:32,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-04-17 14:32:32,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-04-17 14:32:32,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-04-17 14:32:32,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-04-17 14:32:32,197 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-04-17 14:32:32,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:32,197 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-04-17 14:32:32,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 14:32:32,198 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-04-17 14:32:32,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 14:32:32,198 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:32,198 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:32,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:32,403 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:32,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:32,403 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-04-17 14:32:32,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:32,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008981107] [2020-04-17 14:32:32,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:32,570 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:32,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008981107] [2020-04-17 14:32:32,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898327194] [2020-04-17 14:32:32,571 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:32,620 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:32:32,621 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:32,622 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 14:32:32,622 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:32,648 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:32,656 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:32,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:32,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 14:32:32,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379082541] [2020-04-17 14:32:32,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 14:32:32,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:32,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 14:32:32,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:32:32,657 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-04-17 14:32:33,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:33,074 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-04-17 14:32:33,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 14:32:33,075 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 14:32:33,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:33,075 INFO L225 Difference]: With dead ends: 119 [2020-04-17 14:32:33,076 INFO L226 Difference]: Without dead ends: 113 [2020-04-17 14:32:33,076 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 14:32:33,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-04-17 14:32:33,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-04-17 14:32:33,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-17 14:32:33,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-04-17 14:32:33,079 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-04-17 14:32:33,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:33,079 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-04-17 14:32:33,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 14:32:33,079 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-04-17 14:32:33,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 14:32:33,080 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:33,080 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:33,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:33,283 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:33,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:33,284 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-04-17 14:32:33,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:33,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185194844] [2020-04-17 14:32:33,284 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:33,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:33,442 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:33,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185194844] [2020-04-17 14:32:33,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531433217] [2020-04-17 14:32:33,443 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:33,493 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-04-17 14:32:33,493 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:33,494 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 14:32:33,495 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:33,503 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:33,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:33,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 14:32:33,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078412705] [2020-04-17 14:32:33,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 14:32:33,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:33,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 14:32:33,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:32:33,505 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-04-17 14:32:33,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:33,905 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-04-17 14:32:33,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 14:32:33,905 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 14:32:33,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:33,906 INFO L225 Difference]: With dead ends: 119 [2020-04-17 14:32:33,906 INFO L226 Difference]: Without dead ends: 113 [2020-04-17 14:32:33,906 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-04-17 14:32:33,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-04-17 14:32:33,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-04-17 14:32:33,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 14:32:33,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-04-17 14:32:33,909 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-04-17 14:32:33,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:33,909 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-04-17 14:32:33,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 14:32:33,910 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-04-17 14:32:33,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 14:32:33,910 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:33,910 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:34,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:34,114 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:34,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:34,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-04-17 14:32:34,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:34,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751742905] [2020-04-17 14:32:34,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:34,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:34,325 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:34,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751742905] [2020-04-17 14:32:34,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89493353] [2020-04-17 14:32:34,326 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:34,407 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:32:34,407 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:34,408 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 14:32:34,409 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:34,451 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:34,461 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:34,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:34,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 14:32:34,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220026589] [2020-04-17 14:32:34,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 14:32:34,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:34,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 14:32:34,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:32:34,463 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-04-17 14:32:34,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:34,894 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-04-17 14:32:34,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 14:32:34,894 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 14:32:34,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:34,895 INFO L225 Difference]: With dead ends: 116 [2020-04-17 14:32:34,895 INFO L226 Difference]: Without dead ends: 110 [2020-04-17 14:32:34,895 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-04-17 14:32:34,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-04-17 14:32:34,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-04-17 14:32:34,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 14:32:34,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-04-17 14:32:34,898 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-04-17 14:32:34,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:34,898 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-04-17 14:32:34,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 14:32:34,899 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-04-17 14:32:34,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 14:32:34,899 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:34,900 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:35,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:35,100 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:35,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:35,101 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-04-17 14:32:35,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:35,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696506407] [2020-04-17 14:32:35,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:35,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:35,267 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:35,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696506407] [2020-04-17 14:32:35,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797244150] [2020-04-17 14:32:35,267 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:35,320 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-04-17 14:32:35,321 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:35,322 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 14:32:35,323 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:35,332 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:35,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:35,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 14:32:35,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383066955] [2020-04-17 14:32:35,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 14:32:35,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:35,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 14:32:35,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:32:35,334 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-04-17 14:32:35,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:35,786 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-04-17 14:32:35,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 14:32:35,786 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 14:32:35,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:35,787 INFO L225 Difference]: With dead ends: 117 [2020-04-17 14:32:35,787 INFO L226 Difference]: Without dead ends: 111 [2020-04-17 14:32:35,787 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-04-17 14:32:35,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-04-17 14:32:35,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-04-17 14:32:35,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-04-17 14:32:35,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-04-17 14:32:35,790 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-04-17 14:32:35,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:35,790 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-04-17 14:32:35,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 14:32:35,790 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-04-17 14:32:35,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 14:32:35,791 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:35,791 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:35,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:35,992 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:35,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:35,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-04-17 14:32:35,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:35,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528835192] [2020-04-17 14:32:35,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:35,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:36,148 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:36,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528835192] [2020-04-17 14:32:36,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95254128] [2020-04-17 14:32:36,148 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:36,201 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-04-17 14:32:36,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:36,202 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 14:32:36,203 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:36,243 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:36,252 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:36,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:36,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 14:32:36,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761888541] [2020-04-17 14:32:36,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 14:32:36,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:36,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 14:32:36,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:32:36,254 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-04-17 14:32:36,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:36,782 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-04-17 14:32:36,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 14:32:36,782 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 14:32:36,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:36,783 INFO L225 Difference]: With dead ends: 114 [2020-04-17 14:32:36,783 INFO L226 Difference]: Without dead ends: 108 [2020-04-17 14:32:36,784 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-04-17 14:32:36,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-04-17 14:32:36,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-04-17 14:32:36,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-04-17 14:32:36,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-04-17 14:32:36,786 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-04-17 14:32:36,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:36,786 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-04-17 14:32:36,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 14:32:36,786 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-04-17 14:32:36,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 14:32:36,787 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:36,787 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:36,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:36,989 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:36,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:36,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-04-17 14:32:36,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:36,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085407830] [2020-04-17 14:32:36,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:37,137 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:37,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085407830] [2020-04-17 14:32:37,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843988046] [2020-04-17 14:32:37,138 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:37,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:37,185 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 14:32:37,185 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:37,196 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:37,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:37,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 14:32:37,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046513132] [2020-04-17 14:32:37,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 14:32:37,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:37,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 14:32:37,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:32:37,198 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-04-17 14:32:37,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:37,690 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-04-17 14:32:37,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 14:32:37,690 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 14:32:37,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:37,691 INFO L225 Difference]: With dead ends: 115 [2020-04-17 14:32:37,691 INFO L226 Difference]: Without dead ends: 109 [2020-04-17 14:32:37,692 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-04-17 14:32:37,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-04-17 14:32:37,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-04-17 14:32:37,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-04-17 14:32:37,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-04-17 14:32:37,694 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-04-17 14:32:37,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:37,694 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-04-17 14:32:37,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 14:32:37,694 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-04-17 14:32:37,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 14:32:37,695 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:37,695 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:37,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:37,898 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:37,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:37,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-04-17 14:32:37,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:37,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529823989] [2020-04-17 14:32:37,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:38,042 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:38,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529823989] [2020-04-17 14:32:38,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823480716] [2020-04-17 14:32:38,043 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:38,089 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:32:38,089 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:38,090 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 14:32:38,090 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:38,104 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:38,113 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:38,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:38,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 14:32:38,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325954353] [2020-04-17 14:32:38,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 14:32:38,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:38,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 14:32:38,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:32:38,114 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-04-17 14:32:38,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:38,729 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-04-17 14:32:38,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 14:32:38,729 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 14:32:38,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:38,730 INFO L225 Difference]: With dead ends: 112 [2020-04-17 14:32:38,730 INFO L226 Difference]: Without dead ends: 106 [2020-04-17 14:32:38,730 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-04-17 14:32:38,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-04-17 14:32:38,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-04-17 14:32:38,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-04-17 14:32:38,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-04-17 14:32:38,732 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-04-17 14:32:38,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:38,732 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-04-17 14:32:38,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 14:32:38,732 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-04-17 14:32:38,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 14:32:38,733 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:38,733 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:38,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:38,934 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:38,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:38,934 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-04-17 14:32:38,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:38,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737721856] [2020-04-17 14:32:38,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:38,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:39,066 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:39,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737721856] [2020-04-17 14:32:39,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262809492] [2020-04-17 14:32:39,067 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:39,125 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-04-17 14:32:39,125 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:39,126 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:32:39,127 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:39,139 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:39,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:39,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 14:32:39,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597757574] [2020-04-17 14:32:39,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 14:32:39,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:39,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 14:32:39,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:32:39,140 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-04-17 14:32:39,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:39,664 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-04-17 14:32:39,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 14:32:39,664 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 14:32:39,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:39,665 INFO L225 Difference]: With dead ends: 113 [2020-04-17 14:32:39,665 INFO L226 Difference]: Without dead ends: 107 [2020-04-17 14:32:39,665 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-04-17 14:32:39,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-04-17 14:32:39,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-04-17 14:32:39,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 14:32:39,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-04-17 14:32:39,668 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-04-17 14:32:39,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:39,668 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-04-17 14:32:39,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 14:32:39,668 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-04-17 14:32:39,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 14:32:39,668 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:39,668 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:39,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:39,869 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:39,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:39,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-04-17 14:32:39,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:39,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132606567] [2020-04-17 14:32:39,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:39,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:40,011 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:40,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132606567] [2020-04-17 14:32:40,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315449281] [2020-04-17 14:32:40,011 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:40,059 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:32:40,059 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:40,060 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 14:32:40,061 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:40,074 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:40,084 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:40,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:40,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 14:32:40,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001659388] [2020-04-17 14:32:40,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 14:32:40,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:40,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 14:32:40,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:32:40,086 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-04-17 14:32:40,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:40,762 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-04-17 14:32:40,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 14:32:40,762 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 14:32:40,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:40,763 INFO L225 Difference]: With dead ends: 110 [2020-04-17 14:32:40,763 INFO L226 Difference]: Without dead ends: 104 [2020-04-17 14:32:40,763 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-04-17 14:32:40,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-04-17 14:32:40,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-04-17 14:32:40,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 14:32:40,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-04-17 14:32:40,766 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-04-17 14:32:40,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:40,766 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-04-17 14:32:40,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 14:32:40,766 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-04-17 14:32:40,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 14:32:40,766 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:40,767 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:40,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:40,967 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:40,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:40,968 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-04-17 14:32:40,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:40,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654492631] [2020-04-17 14:32:40,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:40,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:41,098 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:41,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654492631] [2020-04-17 14:32:41,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643887093] [2020-04-17 14:32:41,098 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:41,147 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-04-17 14:32:41,147 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:41,148 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 14:32:41,149 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:41,168 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:41,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:41,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 14:32:41,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916122508] [2020-04-17 14:32:41,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 14:32:41,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:41,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 14:32:41,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:32:41,169 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-04-17 14:32:41,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:41,911 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-04-17 14:32:41,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-04-17 14:32:41,912 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 14:32:41,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:41,912 INFO L225 Difference]: With dead ends: 111 [2020-04-17 14:32:41,912 INFO L226 Difference]: Without dead ends: 105 [2020-04-17 14:32:41,913 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-04-17 14:32:41,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-04-17 14:32:41,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-04-17 14:32:41,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-04-17 14:32:41,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-04-17 14:32:41,915 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-04-17 14:32:41,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:41,915 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-04-17 14:32:41,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 14:32:41,915 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-04-17 14:32:41,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 14:32:41,915 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:41,915 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:42,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:42,116 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:42,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:42,117 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-04-17 14:32:42,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:42,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007102958] [2020-04-17 14:32:42,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:42,243 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:42,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007102958] [2020-04-17 14:32:42,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459717511] [2020-04-17 14:32:42,243 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:42,292 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-04-17 14:32:42,293 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:42,293 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:32:42,294 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:42,328 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:42,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:42,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 14:32:42,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251038654] [2020-04-17 14:32:42,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 14:32:42,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:42,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 14:32:42,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:32:42,330 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-04-17 14:32:43,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:43,030 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-04-17 14:32:43,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-17 14:32:43,030 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 14:32:43,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:43,031 INFO L225 Difference]: With dead ends: 108 [2020-04-17 14:32:43,031 INFO L226 Difference]: Without dead ends: 102 [2020-04-17 14:32:43,031 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=646, Invalid=1706, Unknown=0, NotChecked=0, Total=2352 [2020-04-17 14:32:43,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-04-17 14:32:43,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-04-17 14:32:43,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-17 14:32:43,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-04-17 14:32:43,034 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-04-17 14:32:43,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:43,034 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-04-17 14:32:43,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 14:32:43,034 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-04-17 14:32:43,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 14:32:43,034 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:43,035 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:43,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:43,235 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:43,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:43,236 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-04-17 14:32:43,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:43,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638761219] [2020-04-17 14:32:43,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:43,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:43,377 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:43,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638761219] [2020-04-17 14:32:43,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617011532] [2020-04-17 14:32:43,378 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:43,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:43,427 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 14:32:43,428 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:43,455 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:43,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:43,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 14:32:43,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089386687] [2020-04-17 14:32:43,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 14:32:43,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:43,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 14:32:43,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:32:43,456 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-04-17 14:32:44,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:44,200 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-04-17 14:32:44,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 14:32:44,201 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 14:32:44,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:44,202 INFO L225 Difference]: With dead ends: 128 [2020-04-17 14:32:44,202 INFO L226 Difference]: Without dead ends: 122 [2020-04-17 14:32:44,203 INFO L678 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 [2020-04-17 14:32:44,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-04-17 14:32:44,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-04-17 14:32:44,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 14:32:44,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-04-17 14:32:44,206 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-04-17 14:32:44,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:44,206 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-04-17 14:32:44,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 14:32:44,207 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-04-17 14:32:44,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 14:32:44,207 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:44,207 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:44,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:44,412 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:44,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:44,412 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-04-17 14:32:44,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:44,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543360350] [2020-04-17 14:32:44,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:44,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:44,626 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:44,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543360350] [2020-04-17 14:32:44,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062259646] [2020-04-17 14:32:44,627 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:44,677 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:32:44,677 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:44,678 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:32:44,679 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:44,712 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:44,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:44,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 14:32:44,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867440233] [2020-04-17 14:32:44,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 14:32:44,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:44,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 14:32:44,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:32:44,713 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-04-17 14:32:45,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:45,438 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-04-17 14:32:45,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-17 14:32:45,439 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 14:32:45,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:45,439 INFO L225 Difference]: With dead ends: 109 [2020-04-17 14:32:45,439 INFO L226 Difference]: Without dead ends: 101 [2020-04-17 14:32:45,440 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=733, Invalid=1817, Unknown=0, NotChecked=0, Total=2550 [2020-04-17 14:32:45,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-04-17 14:32:45,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-04-17 14:32:45,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-04-17 14:32:45,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-04-17 14:32:45,442 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-04-17 14:32:45,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:45,442 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-04-17 14:32:45,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 14:32:45,442 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-04-17 14:32:45,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 14:32:45,443 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:45,443 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:45,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:45,644 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:45,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:45,644 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-04-17 14:32:45,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:45,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896261018] [2020-04-17 14:32:45,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:45,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:45,823 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:45,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896261018] [2020-04-17 14:32:45,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448992834] [2020-04-17 14:32:45,824 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:45,879 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-04-17 14:32:45,879 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:45,880 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:32:45,881 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:45,888 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:45,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:45,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 14:32:45,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282591701] [2020-04-17 14:32:45,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 14:32:45,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:45,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 14:32:45,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:32:45,890 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-04-17 14:32:46,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:46,245 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-04-17 14:32:46,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 14:32:46,246 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 14:32:46,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:46,246 INFO L225 Difference]: With dead ends: 124 [2020-04-17 14:32:46,247 INFO L226 Difference]: Without dead ends: 118 [2020-04-17 14:32:46,247 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 14:32:46,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-04-17 14:32:46,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-04-17 14:32:46,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 14:32:46,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 14:32:46,249 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-04-17 14:32:46,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:46,249 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 14:32:46,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 14:32:46,250 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 14:32:46,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 14:32:46,250 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:46,250 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:46,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:46,451 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:46,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:46,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-04-17 14:32:46,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:46,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582157155] [2020-04-17 14:32:46,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:46,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:46,656 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:46,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582157155] [2020-04-17 14:32:46,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543440280] [2020-04-17 14:32:46,657 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:46,704 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:32:46,705 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:46,706 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:32:46,707 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:46,721 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:46,739 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:46,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:46,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 14:32:46,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969079030] [2020-04-17 14:32:46,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 14:32:46,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:46,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 14:32:46,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:32:46,741 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-04-17 14:32:47,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:47,172 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-04-17 14:32:47,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 14:32:47,173 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 14:32:47,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:47,173 INFO L225 Difference]: With dead ends: 121 [2020-04-17 14:32:47,173 INFO L226 Difference]: Without dead ends: 115 [2020-04-17 14:32:47,174 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-04-17 14:32:47,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-04-17 14:32:47,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-04-17 14:32:47,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 14:32:47,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 14:32:47,176 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-04-17 14:32:47,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:47,176 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 14:32:47,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 14:32:47,177 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 14:32:47,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 14:32:47,182 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:47,182 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:47,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:47,383 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:47,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:47,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-04-17 14:32:47,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:47,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011078985] [2020-04-17 14:32:47,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:47,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:47,560 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:47,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011078985] [2020-04-17 14:32:47,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944413104] [2020-04-17 14:32:47,561 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:47,614 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-04-17 14:32:47,615 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:47,616 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:32:47,617 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:47,624 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:47,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:47,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 14:32:47,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851562567] [2020-04-17 14:32:47,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 14:32:47,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:47,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 14:32:47,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:32:47,625 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-04-17 14:32:48,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:48,033 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-04-17 14:32:48,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 14:32:48,034 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 14:32:48,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:48,034 INFO L225 Difference]: With dead ends: 118 [2020-04-17 14:32:48,035 INFO L226 Difference]: Without dead ends: 112 [2020-04-17 14:32:48,035 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 14:32:48,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-04-17 14:32:48,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-04-17 14:32:48,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 14:32:48,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 14:32:48,037 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-04-17 14:32:48,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:48,037 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 14:32:48,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 14:32:48,038 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 14:32:48,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 14:32:48,038 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:48,038 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:48,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:48,239 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:48,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:48,240 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-04-17 14:32:48,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:48,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832546959] [2020-04-17 14:32:48,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:48,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:48,413 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:48,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832546959] [2020-04-17 14:32:48,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883962630] [2020-04-17 14:32:48,414 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:48,465 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-04-17 14:32:48,466 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:48,466 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:32:48,467 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:48,482 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:48,490 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:48,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:48,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 14:32:48,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681245805] [2020-04-17 14:32:48,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 14:32:48,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:48,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 14:32:48,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:32:48,491 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-04-17 14:32:48,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:48,966 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-04-17 14:32:48,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 14:32:48,966 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 14:32:48,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:48,967 INFO L225 Difference]: With dead ends: 117 [2020-04-17 14:32:48,967 INFO L226 Difference]: Without dead ends: 111 [2020-04-17 14:32:48,967 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-04-17 14:32:48,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-04-17 14:32:48,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-04-17 14:32:48,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 14:32:48,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 14:32:48,970 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-04-17 14:32:48,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:48,970 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 14:32:48,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 14:32:48,970 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 14:32:48,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 14:32:48,970 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:48,970 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:49,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:49,171 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:49,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:49,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-04-17 14:32:49,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:49,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587501529] [2020-04-17 14:32:49,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:49,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:49,337 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:49,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587501529] [2020-04-17 14:32:49,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327067227] [2020-04-17 14:32:49,338 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:49,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:49,387 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:32:49,387 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:49,395 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:49,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:49,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 14:32:49,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519260157] [2020-04-17 14:32:49,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 14:32:49,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:49,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 14:32:49,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:32:49,396 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-04-17 14:32:49,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:49,835 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-04-17 14:32:49,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 14:32:49,836 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 14:32:49,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:49,836 INFO L225 Difference]: With dead ends: 114 [2020-04-17 14:32:49,836 INFO L226 Difference]: Without dead ends: 108 [2020-04-17 14:32:49,837 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-04-17 14:32:49,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-04-17 14:32:49,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-04-17 14:32:49,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 14:32:49,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 14:32:49,838 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-04-17 14:32:49,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:49,839 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 14:32:49,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 14:32:49,839 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 14:32:49,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 14:32:49,839 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:49,839 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:50,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:50,042 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:50,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:50,043 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-04-17 14:32:50,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:50,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294099435] [2020-04-17 14:32:50,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:50,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:50,206 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:50,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294099435] [2020-04-17 14:32:50,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105821344] [2020-04-17 14:32:50,207 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:50,254 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:32:50,254 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:50,255 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:32:50,256 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:50,270 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:50,279 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:50,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:50,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 14:32:50,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85212753] [2020-04-17 14:32:50,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 14:32:50,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:50,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 14:32:50,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:32:50,280 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-04-17 14:32:50,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:50,848 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-04-17 14:32:50,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 14:32:50,849 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 14:32:50,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:50,849 INFO L225 Difference]: With dead ends: 113 [2020-04-17 14:32:50,850 INFO L226 Difference]: Without dead ends: 107 [2020-04-17 14:32:50,850 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-04-17 14:32:50,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-04-17 14:32:50,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-04-17 14:32:50,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 14:32:50,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 14:32:50,852 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-04-17 14:32:50,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:50,852 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 14:32:50,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 14:32:50,853 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 14:32:50,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 14:32:50,853 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:50,854 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:51,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:51,057 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:51,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:51,057 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-04-17 14:32:51,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:51,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539642850] [2020-04-17 14:32:51,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:51,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:51,236 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:51,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539642850] [2020-04-17 14:32:51,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881800745] [2020-04-17 14:32:51,237 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:51,290 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-04-17 14:32:51,290 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:51,292 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:32:51,292 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:51,312 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:51,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:51,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 14:32:51,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043072190] [2020-04-17 14:32:51,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 14:32:51,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:51,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 14:32:51,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:32:51,314 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-04-17 14:32:51,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:51,809 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-04-17 14:32:51,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 14:32:51,809 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 14:32:51,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:51,810 INFO L225 Difference]: With dead ends: 110 [2020-04-17 14:32:51,810 INFO L226 Difference]: Without dead ends: 104 [2020-04-17 14:32:51,811 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-04-17 14:32:51,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-04-17 14:32:51,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-04-17 14:32:51,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 14:32:51,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 14:32:51,813 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-04-17 14:32:51,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:51,813 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 14:32:51,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 14:32:51,813 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 14:32:51,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 14:32:51,814 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:51,814 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:52,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:52,015 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:52,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:52,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-04-17 14:32:52,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:52,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474045516] [2020-04-17 14:32:52,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:52,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:52,173 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:52,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474045516] [2020-04-17 14:32:52,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030343263] [2020-04-17 14:32:52,174 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:52,222 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:32:52,222 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:52,223 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:32:52,223 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:52,247 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:52,256 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:52,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:52,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 14:32:52,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090560577] [2020-04-17 14:32:52,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 14:32:52,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:52,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 14:32:52,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:32:52,258 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-04-17 14:32:52,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:52,859 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-04-17 14:32:52,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 14:32:52,860 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 14:32:52,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:52,860 INFO L225 Difference]: With dead ends: 109 [2020-04-17 14:32:52,861 INFO L226 Difference]: Without dead ends: 103 [2020-04-17 14:32:52,861 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-04-17 14:32:52,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-04-17 14:32:52,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-04-17 14:32:52,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 14:32:52,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 14:32:52,863 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-04-17 14:32:52,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:52,863 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 14:32:52,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 14:32:52,864 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 14:32:52,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 14:32:52,864 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:52,864 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:53,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:53,065 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:53,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:53,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-04-17 14:32:53,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:53,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190961845] [2020-04-17 14:32:53,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:53,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:53,215 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:53,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190961845] [2020-04-17 14:32:53,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998578523] [2020-04-17 14:32:53,216 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:53,264 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-04-17 14:32:53,264 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:53,265 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:32:53,265 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:53,277 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:53,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:53,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 14:32:53,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857164531] [2020-04-17 14:32:53,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 14:32:53,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:53,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 14:32:53,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:32:53,278 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-04-17 14:32:53,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:53,797 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-04-17 14:32:53,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 14:32:53,798 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 14:32:53,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:53,798 INFO L225 Difference]: With dead ends: 106 [2020-04-17 14:32:53,798 INFO L226 Difference]: Without dead ends: 100 [2020-04-17 14:32:53,799 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-04-17 14:32:53,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-04-17 14:32:53,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-04-17 14:32:53,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 14:32:53,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 14:32:53,801 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-04-17 14:32:53,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:53,801 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 14:32:53,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 14:32:53,801 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 14:32:53,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 14:32:53,802 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:53,802 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:54,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:54,003 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:54,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:54,003 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-04-17 14:32:54,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:54,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138944372] [2020-04-17 14:32:54,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:54,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:54,154 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:54,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138944372] [2020-04-17 14:32:54,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403731933] [2020-04-17 14:32:54,155 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:54,210 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-04-17 14:32:54,210 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:54,211 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:32:54,211 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:54,225 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:54,238 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:54,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:54,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 14:32:54,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549643115] [2020-04-17 14:32:54,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 14:32:54,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:54,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 14:32:54,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:32:54,240 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-04-17 14:32:54,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:54,931 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-04-17 14:32:54,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 14:32:54,932 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 14:32:54,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:54,932 INFO L225 Difference]: With dead ends: 105 [2020-04-17 14:32:54,933 INFO L226 Difference]: Without dead ends: 99 [2020-04-17 14:32:54,933 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-04-17 14:32:54,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-04-17 14:32:54,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-04-17 14:32:54,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 14:32:54,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 14:32:54,935 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-04-17 14:32:54,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:54,935 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 14:32:54,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 14:32:54,936 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 14:32:54,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 14:32:54,936 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:54,936 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:55,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:55,137 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:55,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:55,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-04-17 14:32:55,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:55,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216585318] [2020-04-17 14:32:55,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:55,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:55,277 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:55,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216585318] [2020-04-17 14:32:55,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731929479] [2020-04-17 14:32:55,278 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:55,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:55,328 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:32:55,328 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:55,338 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:55,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:55,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 14:32:55,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637263606] [2020-04-17 14:32:55,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 14:32:55,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:55,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 14:32:55,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:32:55,339 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-04-17 14:32:55,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:55,899 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-04-17 14:32:55,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 14:32:55,899 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 14:32:55,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:55,900 INFO L225 Difference]: With dead ends: 102 [2020-04-17 14:32:55,900 INFO L226 Difference]: Without dead ends: 96 [2020-04-17 14:32:55,900 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-04-17 14:32:55,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-04-17 14:32:55,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-04-17 14:32:55,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 14:32:55,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 14:32:55,902 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-04-17 14:32:55,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:55,903 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 14:32:55,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 14:32:55,903 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 14:32:55,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 14:32:55,903 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:55,903 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:56,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:56,104 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:56,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:56,105 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-04-17 14:32:56,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:56,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711432637] [2020-04-17 14:32:56,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:56,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:56,250 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:56,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711432637] [2020-04-17 14:32:56,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657743720] [2020-04-17 14:32:56,251 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:56,297 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:32:56,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:56,298 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:32:56,298 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:56,325 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:56,335 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:56,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:56,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 14:32:56,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525225096] [2020-04-17 14:32:56,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 14:32:56,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:56,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 14:32:56,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:32:56,336 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-04-17 14:32:57,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:57,099 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-04-17 14:32:57,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-17 14:32:57,100 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 14:32:57,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:57,100 INFO L225 Difference]: With dead ends: 101 [2020-04-17 14:32:57,101 INFO L226 Difference]: Without dead ends: 95 [2020-04-17 14:32:57,101 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-04-17 14:32:57,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-04-17 14:32:57,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-04-17 14:32:57,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 14:32:57,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 14:32:57,103 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-04-17 14:32:57,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:57,103 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 14:32:57,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 14:32:57,104 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 14:32:57,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 14:32:57,104 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:57,104 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:57,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:57,305 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:57,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:57,306 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-04-17 14:32:57,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:57,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685564606] [2020-04-17 14:32:57,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:57,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:57,446 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:57,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685564606] [2020-04-17 14:32:57,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252713046] [2020-04-17 14:32:57,446 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:57,497 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-04-17 14:32:57,498 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:57,498 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:32:57,499 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:57,511 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:57,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:57,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 14:32:57,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128747067] [2020-04-17 14:32:57,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 14:32:57,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:57,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 14:32:57,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:32:57,512 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-04-17 14:32:58,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:58,117 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-04-17 14:32:58,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-04-17 14:32:58,117 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 14:32:58,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:58,118 INFO L225 Difference]: With dead ends: 98 [2020-04-17 14:32:58,118 INFO L226 Difference]: Without dead ends: 92 [2020-04-17 14:32:58,119 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-04-17 14:32:58,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-04-17 14:32:58,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-04-17 14:32:58,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 14:32:58,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 14:32:58,121 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-04-17 14:32:58,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:58,121 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 14:32:58,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 14:32:58,121 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 14:32:58,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 14:32:58,121 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:58,121 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:58,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:58,322 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:58,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:58,323 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-04-17 14:32:58,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:58,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782331924] [2020-04-17 14:32:58,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:58,462 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:58,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782331924] [2020-04-17 14:32:58,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127425909] [2020-04-17 14:32:58,463 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:58,510 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:32:58,510 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:58,512 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:32:58,512 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:58,528 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:58,539 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:58,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:58,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 14:32:58,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066085249] [2020-04-17 14:32:58,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 14:32:58,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:58,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 14:32:58,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:32:58,540 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-04-17 14:32:59,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:59,358 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-04-17 14:32:59,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-17 14:32:59,359 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 14:32:59,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:59,359 INFO L225 Difference]: With dead ends: 97 [2020-04-17 14:32:59,359 INFO L226 Difference]: Without dead ends: 91 [2020-04-17 14:32:59,360 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-04-17 14:32:59,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-04-17 14:32:59,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-04-17 14:32:59,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 14:32:59,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 14:32:59,362 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-04-17 14:32:59,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:59,362 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 14:32:59,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 14:32:59,362 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 14:32:59,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 14:32:59,363 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:59,363 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:59,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:59,564 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:59,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:59,564 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-04-17 14:32:59,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:59,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538690956] [2020-04-17 14:32:59,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:59,707 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:59,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538690956] [2020-04-17 14:32:59,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666704425] [2020-04-17 14:32:59,707 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:59,759 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-04-17 14:32:59,759 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:59,760 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:32:59,760 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:59,772 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:59,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:59,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 14:32:59,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774237540] [2020-04-17 14:32:59,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 14:32:59,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:59,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 14:32:59,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:32:59,773 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-04-17 14:33:00,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:00,424 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-04-17 14:33:00,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 14:33:00,424 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 14:33:00,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:00,425 INFO L225 Difference]: With dead ends: 113 [2020-04-17 14:33:00,425 INFO L226 Difference]: Without dead ends: 107 [2020-04-17 14:33:00,425 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-04-17 14:33:00,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-04-17 14:33:00,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-04-17 14:33:00,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-04-17 14:33:00,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-04-17 14:33:00,428 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-04-17 14:33:00,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:00,428 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-04-17 14:33:00,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 14:33:00,428 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-04-17 14:33:00,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 14:33:00,428 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:00,428 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:00,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:00,629 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:00,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:00,630 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-04-17 14:33:00,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:00,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505639529] [2020-04-17 14:33:00,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:00,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:00,764 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:00,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505639529] [2020-04-17 14:33:00,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842808064] [2020-04-17 14:33:00,765 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:00,816 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-04-17 14:33:00,817 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:00,818 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:33:00,818 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:00,833 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:00,844 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:00,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:00,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 14:33:00,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25861957] [2020-04-17 14:33:00,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 14:33:00,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:00,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 14:33:00,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:33:00,845 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-04-17 14:33:01,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:01,694 INFO L93 Difference]: Finished difference Result 94 states and 233 transitions. [2020-04-17 14:33:01,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-04-17 14:33:01,694 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 14:33:01,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:01,695 INFO L225 Difference]: With dead ends: 94 [2020-04-17 14:33:01,695 INFO L226 Difference]: Without dead ends: 86 [2020-04-17 14:33:01,695 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862 [2020-04-17 14:33:01,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-04-17 14:33:01,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2020-04-17 14:33:01,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-04-17 14:33:01,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-04-17 14:33:01,697 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-04-17 14:33:01,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:01,697 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-04-17 14:33:01,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 14:33:01,697 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-04-17 14:33:01,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 14:33:01,698 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:01,698 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:01,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:01,898 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:01,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:01,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-04-17 14:33:01,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:01,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324047151] [2020-04-17 14:33:01,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:01,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:02,059 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:02,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324047151] [2020-04-17 14:33:02,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259485441] [2020-04-17 14:33:02,059 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:02,108 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:33:02,109 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:02,123 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:02,135 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:02,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:02,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 14:33:02,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962309749] [2020-04-17 14:33:02,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 14:33:02,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:02,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 14:33:02,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:33:02,136 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-04-17 14:33:02,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:02,925 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-04-17 14:33:02,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 14:33:02,925 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 14:33:02,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:02,926 INFO L225 Difference]: With dead ends: 108 [2020-04-17 14:33:02,926 INFO L226 Difference]: Without dead ends: 103 [2020-04-17 14:33:02,927 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-04-17 14:33:02,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-04-17 14:33:02,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-04-17 14:33:02,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 14:33:02,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-04-17 14:33:02,929 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-04-17 14:33:02,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:02,929 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-04-17 14:33:02,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 14:33:02,929 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-04-17 14:33:02,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 14:33:02,929 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:02,929 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:03,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:03,130 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:03,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:03,131 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-04-17 14:33:03,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:03,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764689715] [2020-04-17 14:33:03,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:03,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:03,284 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:03,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764689715] [2020-04-17 14:33:03,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699271700] [2020-04-17 14:33:03,285 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:03,330 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:33:03,330 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:03,331 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:33:03,332 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:03,346 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:03,360 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:03,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:03,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 14:33:03,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222124375] [2020-04-17 14:33:03,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:33:03,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:03,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:33:03,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:33:03,361 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-04-17 14:33:04,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:04,203 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-04-17 14:33:04,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 14:33:04,204 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 14:33:04,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:04,204 INFO L225 Difference]: With dead ends: 90 [2020-04-17 14:33:04,204 INFO L226 Difference]: Without dead ends: 85 [2020-04-17 14:33:04,205 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-04-17 14:33:04,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-04-17 14:33:04,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-04-17 14:33:04,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 14:33:04,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-04-17 14:33:04,207 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-04-17 14:33:04,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:04,207 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-04-17 14:33:04,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:33:04,207 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-04-17 14:33:04,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 14:33:04,208 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:04,208 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:04,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:04,409 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:04,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:04,410 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-04-17 14:33:04,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:04,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924114514] [2020-04-17 14:33:04,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:04,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:04,616 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:04,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924114514] [2020-04-17 14:33:04,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164267411] [2020-04-17 14:33:04,616 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:04,670 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-17 14:33:04,670 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:04,671 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:33:04,671 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:04,677 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:04,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:04,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 14:33:04,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571242429] [2020-04-17 14:33:04,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 14:33:04,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:04,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 14:33:04,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:33:04,678 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-04-17 14:33:05,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:05,033 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-04-17 14:33:05,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 14:33:05,033 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 14:33:05,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:05,034 INFO L225 Difference]: With dead ends: 96 [2020-04-17 14:33:05,034 INFO L226 Difference]: Without dead ends: 90 [2020-04-17 14:33:05,034 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-04-17 14:33:05,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-04-17 14:33:05,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-04-17 14:33:05,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-04-17 14:33:05,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-04-17 14:33:05,041 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-04-17 14:33:05,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:05,041 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-04-17 14:33:05,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 14:33:05,041 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-04-17 14:33:05,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 14:33:05,041 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:05,042 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:05,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:05,242 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:05,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:05,243 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-04-17 14:33:05,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:05,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527222136] [2020-04-17 14:33:05,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:05,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:05,439 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:05,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527222136] [2020-04-17 14:33:05,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552450233] [2020-04-17 14:33:05,440 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:05,491 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:33:05,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:05,492 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:33:05,493 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:05,506 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:05,512 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:05,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:05,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 14:33:05,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081803580] [2020-04-17 14:33:05,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:33:05,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:05,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:33:05,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:33:05,514 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-04-17 14:33:05,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:05,891 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-04-17 14:33:05,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 14:33:05,892 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 14:33:05,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:05,892 INFO L225 Difference]: With dead ends: 114 [2020-04-17 14:33:05,892 INFO L226 Difference]: Without dead ends: 108 [2020-04-17 14:33:05,893 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-04-17 14:33:05,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-04-17 14:33:05,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-04-17 14:33:05,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 14:33:05,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-04-17 14:33:05,895 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-04-17 14:33:05,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:05,895 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-04-17 14:33:05,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:33:05,895 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-04-17 14:33:05,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 14:33:05,896 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:05,896 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:06,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:06,097 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:06,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:06,097 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-04-17 14:33:06,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:06,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904566218] [2020-04-17 14:33:06,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:06,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:06,314 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:06,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904566218] [2020-04-17 14:33:06,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182965941] [2020-04-17 14:33:06,315 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:06,367 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-04-17 14:33:06,367 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:06,368 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:33:06,368 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:06,379 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:06,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:06,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 14:33:06,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576070506] [2020-04-17 14:33:06,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 14:33:06,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:06,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 14:33:06,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:33:06,380 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-04-17 14:33:06,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:06,811 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-04-17 14:33:06,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 14:33:06,812 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 14:33:06,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:06,812 INFO L225 Difference]: With dead ends: 115 [2020-04-17 14:33:06,812 INFO L226 Difference]: Without dead ends: 109 [2020-04-17 14:33:06,813 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-04-17 14:33:06,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-04-17 14:33:06,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-04-17 14:33:06,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-04-17 14:33:06,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-04-17 14:33:06,815 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-04-17 14:33:06,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:06,815 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-04-17 14:33:06,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 14:33:06,815 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-04-17 14:33:06,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 14:33:06,816 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:06,816 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:07,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:07,017 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:07,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:07,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-04-17 14:33:07,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:07,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880360377] [2020-04-17 14:33:07,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:07,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:07,221 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:07,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880360377] [2020-04-17 14:33:07,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790739336] [2020-04-17 14:33:07,221 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:07,279 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-04-17 14:33:07,279 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:07,280 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:33:07,281 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:07,296 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:07,303 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:07,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:07,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 14:33:07,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128345112] [2020-04-17 14:33:07,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:33:07,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:07,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:33:07,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:33:07,304 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-04-17 14:33:07,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:07,728 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-04-17 14:33:07,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 14:33:07,728 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 14:33:07,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:07,729 INFO L225 Difference]: With dead ends: 129 [2020-04-17 14:33:07,729 INFO L226 Difference]: Without dead ends: 123 [2020-04-17 14:33:07,730 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-04-17 14:33:07,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-04-17 14:33:07,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-04-17 14:33:07,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-04-17 14:33:07,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-04-17 14:33:07,732 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-04-17 14:33:07,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:07,733 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-04-17 14:33:07,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:33:07,733 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-04-17 14:33:07,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 14:33:07,733 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:07,733 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:07,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:07,937 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:07,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:07,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-04-17 14:33:07,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:07,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783406539] [2020-04-17 14:33:07,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:08,124 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:08,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783406539] [2020-04-17 14:33:08,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522409920] [2020-04-17 14:33:08,125 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:08,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:08,174 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:33:08,174 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:08,182 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:08,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:08,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 14:33:08,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637803819] [2020-04-17 14:33:08,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 14:33:08,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:08,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 14:33:08,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:33:08,183 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-04-17 14:33:08,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:08,661 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-04-17 14:33:08,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 14:33:08,662 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 14:33:08,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:08,662 INFO L225 Difference]: With dead ends: 129 [2020-04-17 14:33:08,662 INFO L226 Difference]: Without dead ends: 123 [2020-04-17 14:33:08,663 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-04-17 14:33:08,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-04-17 14:33:08,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-04-17 14:33:08,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-04-17 14:33:08,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-04-17 14:33:08,665 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-04-17 14:33:08,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:08,665 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-04-17 14:33:08,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 14:33:08,665 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-04-17 14:33:08,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 14:33:08,666 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:08,666 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:08,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:08,867 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:08,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:08,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-04-17 14:33:08,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:08,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030107270] [2020-04-17 14:33:08,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:08,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:09,050 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:09,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030107270] [2020-04-17 14:33:09,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802815798] [2020-04-17 14:33:09,051 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:09,099 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:33:09,099 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:09,100 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:33:09,101 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:09,115 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:09,123 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:09,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:09,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 14:33:09,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557969198] [2020-04-17 14:33:09,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:33:09,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:09,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:33:09,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:33:09,124 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-04-17 14:33:09,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:09,667 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-04-17 14:33:09,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 14:33:09,668 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 14:33:09,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:09,668 INFO L225 Difference]: With dead ends: 126 [2020-04-17 14:33:09,669 INFO L226 Difference]: Without dead ends: 120 [2020-04-17 14:33:09,669 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-04-17 14:33:09,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-04-17 14:33:09,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-04-17 14:33:09,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-04-17 14:33:09,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-04-17 14:33:09,672 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-04-17 14:33:09,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:09,672 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-04-17 14:33:09,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:33:09,672 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-04-17 14:33:09,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 14:33:09,673 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:09,673 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:09,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:09,875 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:09,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:09,875 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-04-17 14:33:09,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:09,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036174622] [2020-04-17 14:33:09,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:09,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:10,051 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:10,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036174622] [2020-04-17 14:33:10,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354993720] [2020-04-17 14:33:10,052 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:10,107 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-17 14:33:10,107 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:10,108 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:33:10,109 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:10,119 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:10,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:10,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 14:33:10,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742445414] [2020-04-17 14:33:10,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 14:33:10,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:10,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 14:33:10,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:33:10,120 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-04-17 14:33:10,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:10,635 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-04-17 14:33:10,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 14:33:10,635 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 14:33:10,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:10,636 INFO L225 Difference]: With dead ends: 127 [2020-04-17 14:33:10,636 INFO L226 Difference]: Without dead ends: 121 [2020-04-17 14:33:10,637 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-04-17 14:33:10,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-04-17 14:33:10,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-04-17 14:33:10,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 14:33:10,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-04-17 14:33:10,639 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-04-17 14:33:10,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:10,639 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-04-17 14:33:10,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 14:33:10,639 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-04-17 14:33:10,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 14:33:10,640 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:10,640 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:10,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:10,841 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:10,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:10,841 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-04-17 14:33:10,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:10,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967635385] [2020-04-17 14:33:10,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:10,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:11,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967635385] [2020-04-17 14:33:11,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747389828] [2020-04-17 14:33:11,019 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:11,067 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:33:11,067 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:11,068 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:33:11,069 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:11,084 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:11,092 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:11,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:11,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 14:33:11,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797058546] [2020-04-17 14:33:11,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:33:11,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:11,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:33:11,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:33:11,093 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-04-17 14:33:11,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:11,694 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-04-17 14:33:11,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 14:33:11,694 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 14:33:11,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:11,695 INFO L225 Difference]: With dead ends: 124 [2020-04-17 14:33:11,695 INFO L226 Difference]: Without dead ends: 118 [2020-04-17 14:33:11,695 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-04-17 14:33:11,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-04-17 14:33:11,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-04-17 14:33:11,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 14:33:11,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-04-17 14:33:11,698 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-04-17 14:33:11,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:11,698 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-04-17 14:33:11,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:33:11,698 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-04-17 14:33:11,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 14:33:11,699 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:11,699 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:11,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:11,900 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:11,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:11,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-04-17 14:33:11,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:11,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173639309] [2020-04-17 14:33:11,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:11,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:12,064 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:12,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173639309] [2020-04-17 14:33:12,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598516927] [2020-04-17 14:33:12,064 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:12,117 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-04-17 14:33:12,118 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:12,119 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:33:12,119 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:12,159 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:12,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:12,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 14:33:12,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473110813] [2020-04-17 14:33:12,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 14:33:12,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:12,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 14:33:12,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:33:12,160 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-04-17 14:33:12,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:12,704 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-04-17 14:33:12,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 14:33:12,705 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 14:33:12,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:12,705 INFO L225 Difference]: With dead ends: 125 [2020-04-17 14:33:12,706 INFO L226 Difference]: Without dead ends: 119 [2020-04-17 14:33:12,706 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-04-17 14:33:12,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-04-17 14:33:12,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-04-17 14:33:12,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-04-17 14:33:12,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-04-17 14:33:12,708 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-04-17 14:33:12,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:12,709 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-04-17 14:33:12,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 14:33:12,709 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-04-17 14:33:12,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 14:33:12,709 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:12,709 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:12,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:12,910 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:12,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:12,911 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-04-17 14:33:12,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:12,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497812128] [2020-04-17 14:33:12,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:12,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:13,075 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:13,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497812128] [2020-04-17 14:33:13,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497187756] [2020-04-17 14:33:13,076 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:13,125 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-04-17 14:33:13,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:13,126 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:33:13,127 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:13,146 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:13,155 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:13,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:13,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 14:33:13,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385692445] [2020-04-17 14:33:13,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:33:13,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:13,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:33:13,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:33:13,156 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-04-17 14:33:13,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:13,835 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-04-17 14:33:13,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 14:33:13,835 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 14:33:13,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:13,836 INFO L225 Difference]: With dead ends: 122 [2020-04-17 14:33:13,836 INFO L226 Difference]: Without dead ends: 116 [2020-04-17 14:33:13,836 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-04-17 14:33:13,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-04-17 14:33:13,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-04-17 14:33:13,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-17 14:33:13,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-04-17 14:33:13,839 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-04-17 14:33:13,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:13,840 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-04-17 14:33:13,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:33:13,840 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-04-17 14:33:13,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 14:33:13,840 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:13,840 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:14,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:14,042 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:14,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:14,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-04-17 14:33:14,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:14,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918322485] [2020-04-17 14:33:14,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:14,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:14,207 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:14,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918322485] [2020-04-17 14:33:14,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912832685] [2020-04-17 14:33:14,208 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:14,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:14,256 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:33:14,257 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:14,267 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:14,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:14,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 14:33:14,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028349513] [2020-04-17 14:33:14,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 14:33:14,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:14,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 14:33:14,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:33:14,273 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-04-17 14:33:14,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:14,850 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-04-17 14:33:14,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-04-17 14:33:14,851 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 14:33:14,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:14,851 INFO L225 Difference]: With dead ends: 123 [2020-04-17 14:33:14,851 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 14:33:14,852 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-04-17 14:33:14,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 14:33:14,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-04-17 14:33:14,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-04-17 14:33:14,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-04-17 14:33:14,854 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-04-17 14:33:14,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:14,854 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-04-17 14:33:14,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 14:33:14,855 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-04-17 14:33:14,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 14:33:14,855 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:14,855 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:15,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:15,056 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:15,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:15,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-04-17 14:33:15,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:15,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714472862] [2020-04-17 14:33:15,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:15,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:15,257 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:15,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714472862] [2020-04-17 14:33:15,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580189459] [2020-04-17 14:33:15,258 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:15,307 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:33:15,307 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:15,308 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:33:15,308 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:15,325 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:15,335 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:15,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:15,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 14:33:15,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613509636] [2020-04-17 14:33:15,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:33:15,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:15,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:33:15,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:33:15,337 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-04-17 14:33:16,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:16,061 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-04-17 14:33:16,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-17 14:33:16,062 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 14:33:16,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:16,063 INFO L225 Difference]: With dead ends: 120 [2020-04-17 14:33:16,063 INFO L226 Difference]: Without dead ends: 114 [2020-04-17 14:33:16,063 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-04-17 14:33:16,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-04-17 14:33:16,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-04-17 14:33:16,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-04-17 14:33:16,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-04-17 14:33:16,065 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-04-17 14:33:16,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:16,066 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-04-17 14:33:16,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:33:16,066 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-04-17 14:33:16,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 14:33:16,066 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:16,066 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:16,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:16,267 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:16,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:16,267 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-04-17 14:33:16,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:16,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086055971] [2020-04-17 14:33:16,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:16,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:16,428 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:16,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086055971] [2020-04-17 14:33:16,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459551539] [2020-04-17 14:33:16,429 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:16,486 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-17 14:33:16,486 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:16,487 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:33:16,488 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:16,499 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:16,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:16,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 14:33:16,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110703190] [2020-04-17 14:33:16,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 14:33:16,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:16,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 14:33:16,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:33:16,500 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-04-17 14:33:17,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:17,129 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-04-17 14:33:17,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 14:33:17,130 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 14:33:17,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:17,130 INFO L225 Difference]: With dead ends: 121 [2020-04-17 14:33:17,130 INFO L226 Difference]: Without dead ends: 115 [2020-04-17 14:33:17,131 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-04-17 14:33:17,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-04-17 14:33:17,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-04-17 14:33:17,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 14:33:17,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 14:33:17,133 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-04-17 14:33:17,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:17,133 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 14:33:17,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 14:33:17,133 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 14:33:17,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 14:33:17,134 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:17,134 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:17,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:17,335 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:17,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:17,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-04-17 14:33:17,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:17,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045162077] [2020-04-17 14:33:17,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:17,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:17,487 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:17,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045162077] [2020-04-17 14:33:17,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408162996] [2020-04-17 14:33:17,488 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:17,538 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:33:17,538 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:17,539 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:33:17,540 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:17,554 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:17,565 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:17,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:17,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 14:33:17,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951228283] [2020-04-17 14:33:17,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:33:17,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:17,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:33:17,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:33:17,566 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-04-17 14:33:18,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:18,376 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-04-17 14:33:18,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-17 14:33:18,377 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 14:33:18,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:18,377 INFO L225 Difference]: With dead ends: 118 [2020-04-17 14:33:18,377 INFO L226 Difference]: Without dead ends: 112 [2020-04-17 14:33:18,378 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-04-17 14:33:18,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-04-17 14:33:18,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-04-17 14:33:18,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 14:33:18,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 14:33:18,380 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-04-17 14:33:18,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:18,380 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 14:33:18,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:33:18,380 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 14:33:18,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 14:33:18,380 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:18,381 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:18,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:18,581 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:18,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:18,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-04-17 14:33:18,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:18,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033517370] [2020-04-17 14:33:18,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:18,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:18,731 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:18,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033517370] [2020-04-17 14:33:18,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526207370] [2020-04-17 14:33:18,732 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:18,786 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-04-17 14:33:18,786 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:18,788 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:33:18,788 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:18,819 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:18,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:18,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 14:33:18,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685795505] [2020-04-17 14:33:18,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 14:33:18,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:18,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 14:33:18,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:33:18,821 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-04-17 14:33:19,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:19,490 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-04-17 14:33:19,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-04-17 14:33:19,491 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 14:33:19,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:19,491 INFO L225 Difference]: With dead ends: 119 [2020-04-17 14:33:19,492 INFO L226 Difference]: Without dead ends: 113 [2020-04-17 14:33:19,492 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-04-17 14:33:19,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-04-17 14:33:19,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-04-17 14:33:19,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-04-17 14:33:19,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-04-17 14:33:19,495 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-04-17 14:33:19,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:19,495 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-04-17 14:33:19,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 14:33:19,495 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-04-17 14:33:19,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 14:33:19,496 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:19,496 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:19,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:19,699 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:19,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:19,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-04-17 14:33:19,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:19,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532791160] [2020-04-17 14:33:19,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:19,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:19,846 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:19,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532791160] [2020-04-17 14:33:19,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649268025] [2020-04-17 14:33:19,847 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:19,901 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-04-17 14:33:19,901 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:19,902 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:33:19,902 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:19,923 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:19,933 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:19,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:19,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 14:33:19,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498151345] [2020-04-17 14:33:19,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:33:19,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:19,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:33:19,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:33:19,940 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-04-17 14:33:20,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:20,794 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-04-17 14:33:20,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-04-17 14:33:20,794 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 14:33:20,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:20,795 INFO L225 Difference]: With dead ends: 116 [2020-04-17 14:33:20,795 INFO L226 Difference]: Without dead ends: 110 [2020-04-17 14:33:20,795 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-04-17 14:33:20,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-04-17 14:33:20,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-04-17 14:33:20,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 14:33:20,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-04-17 14:33:20,798 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-04-17 14:33:20,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:20,798 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-04-17 14:33:20,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:33:20,798 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-04-17 14:33:20,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 14:33:20,798 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:20,799 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:20,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:20,999 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:21,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:21,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-04-17 14:33:21,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:21,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297562365] [2020-04-17 14:33:21,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:21,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:21,152 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:21,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297562365] [2020-04-17 14:33:21,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194398038] [2020-04-17 14:33:21,152 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:21,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:21,199 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:33:21,199 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:21,211 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:21,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:21,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 14:33:21,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825328115] [2020-04-17 14:33:21,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 14:33:21,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:21,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 14:33:21,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:33:21,212 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-04-17 14:33:21,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:21,930 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-04-17 14:33:21,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-17 14:33:21,931 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 14:33:21,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:21,931 INFO L225 Difference]: With dead ends: 136 [2020-04-17 14:33:21,931 INFO L226 Difference]: Without dead ends: 130 [2020-04-17 14:33:21,935 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-04-17 14:33:21,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-04-17 14:33:21,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-04-17 14:33:21,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-04-17 14:33:21,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-04-17 14:33:21,937 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-04-17 14:33:21,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:21,937 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-04-17 14:33:21,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 14:33:21,937 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-04-17 14:33:21,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 14:33:21,937 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:21,937 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:22,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:22,138 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:22,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:22,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-04-17 14:33:22,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:22,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127283389] [2020-04-17 14:33:22,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:22,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:22,313 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:22,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127283389] [2020-04-17 14:33:22,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104961005] [2020-04-17 14:33:22,314 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:22,363 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:33:22,363 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:22,364 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:33:22,364 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:22,379 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:22,391 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:22,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:22,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 14:33:22,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870137529] [2020-04-17 14:33:22,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:33:22,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:22,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:33:22,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:33:22,392 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-04-17 14:33:23,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:23,276 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-04-17 14:33:23,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-04-17 14:33:23,276 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 14:33:23,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:23,277 INFO L225 Difference]: With dead ends: 117 [2020-04-17 14:33:23,277 INFO L226 Difference]: Without dead ends: 109 [2020-04-17 14:33:23,277 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-04-17 14:33:23,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-04-17 14:33:23,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-04-17 14:33:23,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-04-17 14:33:23,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-04-17 14:33:23,279 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-04-17 14:33:23,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:23,280 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-04-17 14:33:23,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:33:23,280 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-04-17 14:33:23,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 14:33:23,280 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:23,280 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:23,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:23,481 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:23,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:23,482 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-04-17 14:33:23,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:23,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175798079] [2020-04-17 14:33:23,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:23,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:23,710 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:23,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175798079] [2020-04-17 14:33:23,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158900679] [2020-04-17 14:33:23,710 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:23,764 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-17 14:33:23,764 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:23,765 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:23,766 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:23,772 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:23,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:23,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 14:33:23,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43147611] [2020-04-17 14:33:23,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:33:23,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:23,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:33:23,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:33:23,773 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-04-17 14:33:24,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:24,175 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-04-17 14:33:24,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 14:33:24,176 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 14:33:24,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:24,176 INFO L225 Difference]: With dead ends: 134 [2020-04-17 14:33:24,177 INFO L226 Difference]: Without dead ends: 128 [2020-04-17 14:33:24,177 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-04-17 14:33:24,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-04-17 14:33:24,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-04-17 14:33:24,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 14:33:24,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 14:33:24,179 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 14:33:24,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:24,179 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 14:33:24,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:33:24,180 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 14:33:24,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 14:33:24,180 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:24,180 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:24,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:24,381 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:24,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:24,382 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-04-17 14:33:24,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:24,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081019945] [2020-04-17 14:33:24,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:24,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:24,604 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:24,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081019945] [2020-04-17 14:33:24,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413953187] [2020-04-17 14:33:24,605 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:24,654 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:33:24,654 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:24,655 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:24,656 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:24,672 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:24,680 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:24,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:24,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 14:33:24,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828946471] [2020-04-17 14:33:24,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:33:24,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:24,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:33:24,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:33:24,681 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 14:33:25,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:25,161 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-04-17 14:33:25,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 14:33:25,162 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 14:33:25,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:25,163 INFO L225 Difference]: With dead ends: 131 [2020-04-17 14:33:25,163 INFO L226 Difference]: Without dead ends: 125 [2020-04-17 14:33:25,163 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-04-17 14:33:25,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-04-17 14:33:25,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-04-17 14:33:25,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 14:33:25,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 14:33:25,165 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 14:33:25,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:25,166 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 14:33:25,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:33:25,166 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 14:33:25,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 14:33:25,166 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:25,166 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:25,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:25,367 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:25,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:25,368 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-04-17 14:33:25,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:25,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285435518] [2020-04-17 14:33:25,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:25,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:25,579 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:25,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285435518] [2020-04-17 14:33:25,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260855827] [2020-04-17 14:33:25,580 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:25,635 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-04-17 14:33:25,635 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:25,636 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:25,636 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:25,668 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:25,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:25,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 14:33:25,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679747862] [2020-04-17 14:33:25,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:33:25,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:25,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:33:25,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:33:25,669 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 14:33:26,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:26,116 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-04-17 14:33:26,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 14:33:26,117 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 14:33:26,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:26,118 INFO L225 Difference]: With dead ends: 128 [2020-04-17 14:33:26,118 INFO L226 Difference]: Without dead ends: 122 [2020-04-17 14:33:26,118 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-04-17 14:33:26,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-04-17 14:33:26,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-04-17 14:33:26,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 14:33:26,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 14:33:26,120 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 14:33:26,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:26,121 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 14:33:26,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:33:26,121 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 14:33:26,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 14:33:26,121 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:26,121 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:26,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:26,322 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:26,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:26,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-04-17 14:33:26,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:26,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937307716] [2020-04-17 14:33:26,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:26,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:26,544 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:26,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937307716] [2020-04-17 14:33:26,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509916320] [2020-04-17 14:33:26,545 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:26,610 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-04-17 14:33:26,610 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:26,611 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:26,611 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:26,627 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:26,636 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:26,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:26,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 14:33:26,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931308376] [2020-04-17 14:33:26,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:33:26,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:26,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:33:26,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:33:26,637 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 14:33:27,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:27,178 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-04-17 14:33:27,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 14:33:27,178 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 14:33:27,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:27,179 INFO L225 Difference]: With dead ends: 127 [2020-04-17 14:33:27,179 INFO L226 Difference]: Without dead ends: 121 [2020-04-17 14:33:27,179 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-04-17 14:33:27,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-04-17 14:33:27,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-04-17 14:33:27,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 14:33:27,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 14:33:27,182 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 14:33:27,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:27,182 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 14:33:27,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:33:27,182 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 14:33:27,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 14:33:27,183 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:27,183 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:27,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:27,383 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:27,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:27,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-04-17 14:33:27,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:27,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766843283] [2020-04-17 14:33:27,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:27,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:27,586 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:27,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766843283] [2020-04-17 14:33:27,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100931494] [2020-04-17 14:33:27,586 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:27,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:27,635 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:27,635 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:27,643 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:27,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:27,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 14:33:27,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872621678] [2020-04-17 14:33:27,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:33:27,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:27,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:33:27,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:33:27,645 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 14:33:28,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:28,132 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-04-17 14:33:28,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 14:33:28,133 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 14:33:28,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:28,133 INFO L225 Difference]: With dead ends: 124 [2020-04-17 14:33:28,133 INFO L226 Difference]: Without dead ends: 118 [2020-04-17 14:33:28,134 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-04-17 14:33:28,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-04-17 14:33:28,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-04-17 14:33:28,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 14:33:28,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 14:33:28,136 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 14:33:28,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:28,136 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 14:33:28,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:33:28,136 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 14:33:28,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 14:33:28,137 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:28,137 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:28,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:28,338 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:28,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:28,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-04-17 14:33:28,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:28,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802886809] [2020-04-17 14:33:28,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:28,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:28,529 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:28,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802886809] [2020-04-17 14:33:28,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628964868] [2020-04-17 14:33:28,530 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:28,579 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:33:28,579 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:28,580 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:28,581 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:28,596 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:28,607 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:28,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:28,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 14:33:28,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882854297] [2020-04-17 14:33:28,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:33:28,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:28,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:33:28,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:33:28,608 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 14:33:29,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:29,233 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-04-17 14:33:29,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 14:33:29,233 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 14:33:29,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:29,234 INFO L225 Difference]: With dead ends: 123 [2020-04-17 14:33:29,234 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 14:33:29,234 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-04-17 14:33:29,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 14:33:29,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-04-17 14:33:29,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 14:33:29,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 14:33:29,237 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 14:33:29,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:29,237 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 14:33:29,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:33:29,238 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 14:33:29,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 14:33:29,238 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:29,238 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:29,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:29,441 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:29,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:29,442 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-04-17 14:33:29,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:29,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452873558] [2020-04-17 14:33:29,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:29,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:29,635 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:29,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452873558] [2020-04-17 14:33:29,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672426781] [2020-04-17 14:33:29,636 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:29,690 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-17 14:33:29,690 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:29,691 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:29,692 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:29,708 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:29,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:29,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 14:33:29,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394211968] [2020-04-17 14:33:29,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:33:29,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:29,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:33:29,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:33:29,709 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 14:33:30,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:30,263 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-04-17 14:33:30,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 14:33:30,263 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 14:33:30,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:30,264 INFO L225 Difference]: With dead ends: 120 [2020-04-17 14:33:30,264 INFO L226 Difference]: Without dead ends: 114 [2020-04-17 14:33:30,264 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-04-17 14:33:30,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-04-17 14:33:30,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-04-17 14:33:30,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 14:33:30,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 14:33:30,267 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 14:33:30,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:30,267 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 14:33:30,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:33:30,267 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 14:33:30,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 14:33:30,267 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:30,267 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:30,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:30,468 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:30,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:30,469 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-04-17 14:33:30,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:30,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003605080] [2020-04-17 14:33:30,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:30,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:30,653 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:30,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003605080] [2020-04-17 14:33:30,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540501357] [2020-04-17 14:33:30,654 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:30,703 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:33:30,704 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:30,705 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:30,705 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:30,735 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:30,745 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:30,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:30,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 14:33:30,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714192384] [2020-04-17 14:33:30,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:33:30,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:30,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:33:30,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:33:30,746 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 14:33:31,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:31,449 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-04-17 14:33:31,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 14:33:31,449 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 14:33:31,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:31,450 INFO L225 Difference]: With dead ends: 119 [2020-04-17 14:33:31,450 INFO L226 Difference]: Without dead ends: 113 [2020-04-17 14:33:31,450 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-04-17 14:33:31,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-04-17 14:33:31,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-04-17 14:33:31,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 14:33:31,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 14:33:31,452 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 14:33:31,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:31,452 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 14:33:31,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:33:31,453 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 14:33:31,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 14:33:31,453 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:31,453 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:31,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:31,654 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:31,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:31,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-04-17 14:33:31,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:31,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580686393] [2020-04-17 14:33:31,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:31,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:31,841 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:31,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580686393] [2020-04-17 14:33:31,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634600442] [2020-04-17 14:33:31,841 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:31,891 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-04-17 14:33:31,892 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:31,893 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:31,894 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:31,909 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:31,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:31,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 14:33:31,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870901796] [2020-04-17 14:33:31,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:33:31,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:31,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:33:31,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:33:31,911 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 14:33:32,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:32,491 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-04-17 14:33:32,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 14:33:32,491 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 14:33:32,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:32,492 INFO L225 Difference]: With dead ends: 116 [2020-04-17 14:33:32,492 INFO L226 Difference]: Without dead ends: 110 [2020-04-17 14:33:32,493 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-04-17 14:33:32,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-04-17 14:33:32,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-04-17 14:33:32,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 14:33:32,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 14:33:32,495 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 14:33:32,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:32,495 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 14:33:32,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:33:32,495 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 14:33:32,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 14:33:32,496 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:32,496 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:32,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:32,697 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:32,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:32,697 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-04-17 14:33:32,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:32,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86427186] [2020-04-17 14:33:32,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:32,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:32,884 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:32,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86427186] [2020-04-17 14:33:32,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282123942] [2020-04-17 14:33:32,885 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:32,937 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-04-17 14:33:32,937 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:32,939 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:32,939 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:32,955 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:32,965 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:32,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:32,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 14:33:32,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057431630] [2020-04-17 14:33:32,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:33:32,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:32,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:33:32,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:33:32,966 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 14:33:33,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:33,725 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-04-17 14:33:33,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-17 14:33:33,726 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 14:33:33,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:33,727 INFO L225 Difference]: With dead ends: 115 [2020-04-17 14:33:33,727 INFO L226 Difference]: Without dead ends: 109 [2020-04-17 14:33:33,727 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-04-17 14:33:33,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-04-17 14:33:33,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-04-17 14:33:33,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 14:33:33,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 14:33:33,730 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 14:33:33,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:33,730 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 14:33:33,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:33:33,731 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 14:33:33,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 14:33:33,731 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:33,731 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:33,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:33,932 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:33,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:33,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-04-17 14:33:33,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:33,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747486121] [2020-04-17 14:33:33,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:33,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:34,117 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:34,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747486121] [2020-04-17 14:33:34,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463278400] [2020-04-17 14:33:34,118 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:34,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:34,167 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:34,168 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:34,180 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:34,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:34,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 14:33:34,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142856824] [2020-04-17 14:33:34,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:33:34,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:34,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:33:34,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:33:34,182 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 14:33:34,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:34,808 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-04-17 14:33:34,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-04-17 14:33:34,809 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 14:33:34,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:34,809 INFO L225 Difference]: With dead ends: 112 [2020-04-17 14:33:34,810 INFO L226 Difference]: Without dead ends: 106 [2020-04-17 14:33:34,810 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-04-17 14:33:34,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-04-17 14:33:34,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-04-17 14:33:34,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 14:33:34,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 14:33:34,812 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 14:33:34,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:34,812 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 14:33:34,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:33:34,813 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 14:33:34,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 14:33:34,813 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:34,813 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:35,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:35,014 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:35,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:35,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-04-17 14:33:35,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:35,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461521235] [2020-04-17 14:33:35,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:35,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:35,193 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:35,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461521235] [2020-04-17 14:33:35,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045353134] [2020-04-17 14:33:35,194 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:35,242 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:33:35,243 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:35,243 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:35,244 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:35,259 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:35,281 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:35,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:35,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 14:33:35,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675564474] [2020-04-17 14:33:35,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:33:35,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:35,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:33:35,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:33:35,282 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 14:33:36,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:36,113 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-04-17 14:33:36,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-17 14:33:36,113 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 14:33:36,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:36,114 INFO L225 Difference]: With dead ends: 111 [2020-04-17 14:33:36,114 INFO L226 Difference]: Without dead ends: 105 [2020-04-17 14:33:36,114 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-04-17 14:33:36,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-04-17 14:33:36,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-04-17 14:33:36,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 14:33:36,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 14:33:36,117 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 14:33:36,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:36,117 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 14:33:36,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:33:36,117 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 14:33:36,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 14:33:36,117 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:36,117 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:36,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:36,318 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:36,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:36,319 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-04-17 14:33:36,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:36,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371942086] [2020-04-17 14:33:36,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:36,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:36,481 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:36,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371942086] [2020-04-17 14:33:36,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795174808] [2020-04-17 14:33:36,482 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:36,535 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-17 14:33:36,535 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:36,536 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:36,537 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:36,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:36,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 14:33:36,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174242898] [2020-04-17 14:33:36,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:33:36,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:36,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:33:36,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:33:36,550 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 14:33:37,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:37,216 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-04-17 14:33:37,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 14:33:37,217 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 14:33:37,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:37,217 INFO L225 Difference]: With dead ends: 108 [2020-04-17 14:33:37,217 INFO L226 Difference]: Without dead ends: 102 [2020-04-17 14:33:37,218 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-04-17 14:33:37,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-04-17 14:33:37,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-04-17 14:33:37,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 14:33:37,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 14:33:37,220 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 14:33:37,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:37,220 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 14:33:37,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:33:37,220 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 14:33:37,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 14:33:37,221 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:37,221 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:37,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:37,424 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:37,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:37,424 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-04-17 14:33:37,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:37,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234250307] [2020-04-17 14:33:37,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:37,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:37,597 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:37,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234250307] [2020-04-17 14:33:37,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707980318] [2020-04-17 14:33:37,598 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:37,644 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:33:37,645 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:37,646 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:37,646 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:37,661 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:37,672 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:37,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:37,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 14:33:37,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281547812] [2020-04-17 14:33:37,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:33:37,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:37,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:33:37,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:33:37,674 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 14:33:38,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:38,573 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-04-17 14:33:38,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-04-17 14:33:38,574 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 14:33:38,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:38,574 INFO L225 Difference]: With dead ends: 107 [2020-04-17 14:33:38,575 INFO L226 Difference]: Without dead ends: 101 [2020-04-17 14:33:38,575 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-04-17 14:33:38,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-04-17 14:33:38,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-04-17 14:33:38,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 14:33:38,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 14:33:38,578 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 14:33:38,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:38,578 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 14:33:38,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:33:38,579 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 14:33:38,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 14:33:38,579 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:38,579 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:38,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:38,782 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:38,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:38,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-04-17 14:33:38,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:38,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743967779] [2020-04-17 14:33:38,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:38,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:38,942 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:38,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743967779] [2020-04-17 14:33:38,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105791449] [2020-04-17 14:33:38,942 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:38,996 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-04-17 14:33:38,996 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:38,997 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:38,997 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:39,009 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:39,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:39,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 14:33:39,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410727476] [2020-04-17 14:33:39,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:33:39,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:39,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:33:39,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:33:39,011 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 14:33:39,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:39,723 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-04-17 14:33:39,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-04-17 14:33:39,724 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 14:33:39,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:39,724 INFO L225 Difference]: With dead ends: 104 [2020-04-17 14:33:39,724 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 14:33:39,725 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-04-17 14:33:39,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 14:33:39,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-04-17 14:33:39,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 14:33:39,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 14:33:39,727 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 14:33:39,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:39,727 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 14:33:39,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:33:39,727 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 14:33:39,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 14:33:39,728 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:39,728 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:39,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:39,928 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:39,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:39,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-04-17 14:33:39,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:39,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847318095] [2020-04-17 14:33:39,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:39,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:40,091 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:40,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847318095] [2020-04-17 14:33:40,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084167964] [2020-04-17 14:33:40,092 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:40,151 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-04-17 14:33:40,152 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:40,153 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:40,153 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:40,181 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:40,194 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:40,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:40,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 14:33:40,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174184745] [2020-04-17 14:33:40,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:33:40,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:40,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:33:40,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:33:40,196 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 14:33:41,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:41,142 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-04-17 14:33:41,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-04-17 14:33:41,142 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 14:33:41,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:41,143 INFO L225 Difference]: With dead ends: 103 [2020-04-17 14:33:41,143 INFO L226 Difference]: Without dead ends: 97 [2020-04-17 14:33:41,143 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-04-17 14:33:41,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-04-17 14:33:41,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-04-17 14:33:41,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 14:33:41,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 14:33:41,146 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 14:33:41,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:41,146 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 14:33:41,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:33:41,146 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 14:33:41,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 14:33:41,146 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:41,147 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:41,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:41,347 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:41,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:41,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-04-17 14:33:41,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:41,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524418705] [2020-04-17 14:33:41,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:41,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:41,511 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:41,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524418705] [2020-04-17 14:33:41,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696704355] [2020-04-17 14:33:41,512 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:41,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:41,566 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:41,566 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:41,579 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:41,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:41,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 14:33:41,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187643725] [2020-04-17 14:33:41,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:33:41,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:41,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:33:41,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:33:41,580 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 14:33:42,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:42,331 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-04-17 14:33:42,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-17 14:33:42,332 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 14:33:42,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:42,332 INFO L225 Difference]: With dead ends: 119 [2020-04-17 14:33:42,333 INFO L226 Difference]: Without dead ends: 113 [2020-04-17 14:33:42,333 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-04-17 14:33:42,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-04-17 14:33:42,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-04-17 14:33:42,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-04-17 14:33:42,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-04-17 14:33:42,335 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-04-17 14:33:42,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:42,336 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-04-17 14:33:42,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:33:42,336 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-04-17 14:33:42,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 14:33:42,336 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:42,337 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:42,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:42,539 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:42,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:42,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-04-17 14:33:42,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:42,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549061755] [2020-04-17 14:33:42,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:42,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:42,695 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:42,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549061755] [2020-04-17 14:33:42,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379865311] [2020-04-17 14:33:42,696 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:42,744 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:33:42,744 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:42,745 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:42,745 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:42,760 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:42,774 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:42,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:42,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 14:33:42,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379325695] [2020-04-17 14:33:42,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:33:42,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:42,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:33:42,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:33:42,775 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-04-17 14:33:43,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:43,763 INFO L93 Difference]: Finished difference Result 100 states and 249 transitions. [2020-04-17 14:33:43,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-04-17 14:33:43,764 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 14:33:43,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:43,764 INFO L225 Difference]: With dead ends: 100 [2020-04-17 14:33:43,764 INFO L226 Difference]: Without dead ends: 92 [2020-04-17 14:33:43,765 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-04-17 14:33:43,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-04-17 14:33:43,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-04-17 14:33:43,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-04-17 14:33:43,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-04-17 14:33:43,767 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-04-17 14:33:43,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:43,767 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-04-17 14:33:43,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:33:43,768 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-04-17 14:33:43,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 14:33:43,768 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:43,768 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:43,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:43,971 INFO L427 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:43,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:43,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-04-17 14:33:43,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:43,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428998720] [2020-04-17 14:33:43,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:43,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:44,127 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:44,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428998720] [2020-04-17 14:33:44,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137693545] [2020-04-17 14:33:44,128 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:44,188 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-17 14:33:44,188 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:44,189 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:44,189 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:44,204 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:44,216 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:44,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:44,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 14:33:44,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450978977] [2020-04-17 14:33:44,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:33:44,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:44,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:33:44,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:33:44,218 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-04-17 14:33:45,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:45,154 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-04-17 14:33:45,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-17 14:33:45,154 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 14:33:45,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:45,155 INFO L225 Difference]: With dead ends: 116 [2020-04-17 14:33:45,155 INFO L226 Difference]: Without dead ends: 111 [2020-04-17 14:33:45,155 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-04-17 14:33:45,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-04-17 14:33:45,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-04-17 14:33:45,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-04-17 14:33:45,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-04-17 14:33:45,158 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-04-17 14:33:45,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:45,158 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-04-17 14:33:45,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:33:45,158 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-04-17 14:33:45,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:33:45,159 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:45,159 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:45,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:45,360 INFO L427 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:45,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:45,361 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-04-17 14:33:45,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:45,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378956562] [2020-04-17 14:33:45,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:45,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:45,526 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:45,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378956562] [2020-04-17 14:33:45,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157100159] [2020-04-17 14:33:45,527 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:45,575 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:33:45,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:45,577 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:33:45,577 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:45,594 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:45,615 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:45,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:45,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 14:33:45,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685699523] [2020-04-17 14:33:45,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:33:45,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:45,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:33:45,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:33:45,616 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-04-17 14:33:46,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:46,592 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-04-17 14:33:46,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-17 14:33:46,592 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 14:33:46,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:46,593 INFO L225 Difference]: With dead ends: 96 [2020-04-17 14:33:46,593 INFO L226 Difference]: Without dead ends: 91 [2020-04-17 14:33:46,593 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-04-17 14:33:46,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-04-17 14:33:46,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-04-17 14:33:46,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-17 14:33:46,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-04-17 14:33:46,595 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-04-17 14:33:46,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:46,596 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-04-17 14:33:46,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:33:46,596 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-04-17 14:33:46,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:33:46,596 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:46,596 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:46,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:46,797 INFO L427 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:46,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:46,798 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-04-17 14:33:46,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:46,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549059944] [2020-04-17 14:33:46,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:46,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:47,028 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:47,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549059944] [2020-04-17 14:33:47,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131966894] [2020-04-17 14:33:47,029 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:47,083 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-04-17 14:33:47,083 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:47,084 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:33:47,085 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:47,090 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:47,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:47,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 14:33:47,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072389927] [2020-04-17 14:33:47,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:33:47,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:47,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:33:47,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:33:47,091 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-04-17 14:33:47,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:47,463 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-04-17 14:33:47,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 14:33:47,463 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 14:33:47,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:47,464 INFO L225 Difference]: With dead ends: 102 [2020-04-17 14:33:47,464 INFO L226 Difference]: Without dead ends: 96 [2020-04-17 14:33:47,464 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-04-17 14:33:47,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-04-17 14:33:47,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-04-17 14:33:47,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 14:33:47,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-04-17 14:33:47,467 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-04-17 14:33:47,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:47,467 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-04-17 14:33:47,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:33:47,467 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-04-17 14:33:47,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:33:47,467 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:47,467 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:47,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:47,668 INFO L427 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:47,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:47,669 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-04-17 14:33:47,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:47,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608929431] [2020-04-17 14:33:47,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:47,963 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:47,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608929431] [2020-04-17 14:33:47,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28990878] [2020-04-17 14:33:47,964 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:48,020 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-04-17 14:33:48,020 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:48,021 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:33:48,021 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:48,039 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:48,045 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:48,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:48,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 14:33:48,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23505942] [2020-04-17 14:33:48,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:33:48,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:48,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:33:48,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:33:48,046 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-04-17 14:33:48,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:48,489 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-04-17 14:33:48,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 14:33:48,490 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 14:33:48,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:48,490 INFO L225 Difference]: With dead ends: 122 [2020-04-17 14:33:48,490 INFO L226 Difference]: Without dead ends: 116 [2020-04-17 14:33:48,491 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-04-17 14:33:48,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-04-17 14:33:48,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-04-17 14:33:48,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-04-17 14:33:48,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-04-17 14:33:48,494 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-04-17 14:33:48,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:48,494 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-04-17 14:33:48,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:33:48,495 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-04-17 14:33:48,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:33:48,495 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:48,495 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:48,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:48,698 INFO L427 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:48,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:48,699 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-04-17 14:33:48,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:48,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938071984] [2020-04-17 14:33:48,699 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:48,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:48,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938071984] [2020-04-17 14:33:48,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300059570] [2020-04-17 14:33:48,937 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:48,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:48,993 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:33:48,994 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:49,001 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:49,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:49,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 14:33:49,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299812448] [2020-04-17 14:33:49,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:33:49,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:49,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:33:49,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:33:49,002 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-04-17 14:33:49,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:49,434 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-04-17 14:33:49,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 14:33:49,434 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 14:33:49,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:49,435 INFO L225 Difference]: With dead ends: 123 [2020-04-17 14:33:49,435 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 14:33:49,436 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980 [2020-04-17 14:33:49,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 14:33:49,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-04-17 14:33:49,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 14:33:49,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-04-17 14:33:49,439 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-04-17 14:33:49,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:49,439 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-04-17 14:33:49,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:33:49,440 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-04-17 14:33:49,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:33:49,440 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:49,440 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:49,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:49,641 INFO L427 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:49,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:49,641 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-04-17 14:33:49,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:49,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469566020] [2020-04-17 14:33:49,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:49,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:49,867 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:49,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469566020] [2020-04-17 14:33:49,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113738549] [2020-04-17 14:33:49,868 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:49,926 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:33:49,926 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:49,927 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:33:49,927 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:49,942 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:49,951 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:49,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:49,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 14:33:49,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528340324] [2020-04-17 14:33:49,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:33:49,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:49,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:33:49,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:33:49,952 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-04-17 14:33:50,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:50,452 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-04-17 14:33:50,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 14:33:50,452 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 14:33:50,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:50,453 INFO L225 Difference]: With dead ends: 139 [2020-04-17 14:33:50,453 INFO L226 Difference]: Without dead ends: 133 [2020-04-17 14:33:50,454 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2020-04-17 14:33:50,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-04-17 14:33:50,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-04-17 14:33:50,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 14:33:50,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-04-17 14:33:50,457 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-04-17 14:33:50,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:50,457 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-04-17 14:33:50,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:33:50,457 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-04-17 14:33:50,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:33:50,457 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:50,457 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:50,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:50,660 INFO L427 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:50,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:50,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-04-17 14:33:50,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:50,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322146946] [2020-04-17 14:33:50,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:50,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:50,878 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:50,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322146946] [2020-04-17 14:33:50,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493751474] [2020-04-17 14:33:50,879 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:50,939 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-04-17 14:33:50,939 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:50,940 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:33:50,941 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:50,950 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:50,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:50,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 14:33:50,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586128283] [2020-04-17 14:33:50,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:33:50,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:50,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:33:50,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:33:50,951 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-04-17 14:33:51,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:51,489 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-04-17 14:33:51,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 14:33:51,490 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 14:33:51,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:51,490 INFO L225 Difference]: With dead ends: 139 [2020-04-17 14:33:51,490 INFO L226 Difference]: Without dead ends: 133 [2020-04-17 14:33:51,491 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=618, Invalid=1638, Unknown=0, NotChecked=0, Total=2256 [2020-04-17 14:33:51,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-04-17 14:33:51,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-04-17 14:33:51,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-04-17 14:33:51,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-04-17 14:33:51,493 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-04-17 14:33:51,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:51,493 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-04-17 14:33:51,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:33:51,493 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-04-17 14:33:51,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:33:51,494 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:51,494 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:51,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:51,695 INFO L427 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:51,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:51,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-04-17 14:33:51,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:51,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633062686] [2020-04-17 14:33:51,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:51,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:51,909 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:51,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633062686] [2020-04-17 14:33:51,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67012556] [2020-04-17 14:33:51,909 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:51,965 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:33:51,965 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:51,966 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:33:51,967 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:51,983 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:51,991 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:51,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:51,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 14:33:51,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186385113] [2020-04-17 14:33:51,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:33:51,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:51,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:33:51,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:33:51,992 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-04-17 14:33:52,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:52,589 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-04-17 14:33:52,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 14:33:52,590 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 14:33:52,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:52,590 INFO L225 Difference]: With dead ends: 136 [2020-04-17 14:33:52,590 INFO L226 Difference]: Without dead ends: 130 [2020-04-17 14:33:52,591 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2020-04-17 14:33:52,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-04-17 14:33:52,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-04-17 14:33:52,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-17 14:33:52,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-04-17 14:33:52,593 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-04-17 14:33:52,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:52,593 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-04-17 14:33:52,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:33:52,593 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-04-17 14:33:52,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:33:52,594 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:52,594 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:52,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:52,795 INFO L427 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:52,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:52,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-04-17 14:33:52,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:52,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818270199] [2020-04-17 14:33:52,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:52,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:53,000 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:53,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818270199] [2020-04-17 14:33:53,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41245468] [2020-04-17 14:33:53,000 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:53,054 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-04-17 14:33:53,054 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:53,055 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:33:53,056 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:53,065 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:53,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:53,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 14:33:53,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869348877] [2020-04-17 14:33:53,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:33:53,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:53,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:33:53,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:33:53,066 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-04-17 14:33:53,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:53,639 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-04-17 14:33:53,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 14:33:53,640 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 14:33:53,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:53,640 INFO L225 Difference]: With dead ends: 137 [2020-04-17 14:33:53,640 INFO L226 Difference]: Without dead ends: 131 [2020-04-17 14:33:53,641 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2020-04-17 14:33:53,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-04-17 14:33:53,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-04-17 14:33:53,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-04-17 14:33:53,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-04-17 14:33:53,643 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-04-17 14:33:53,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:53,644 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-04-17 14:33:53,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:33:53,644 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-04-17 14:33:53,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:33:53,644 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:53,644 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:53,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:53,845 INFO L427 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:53,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:53,845 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-04-17 14:33:53,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:53,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207394892] [2020-04-17 14:33:53,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:53,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:54,052 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:54,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207394892] [2020-04-17 14:33:54,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157523183] [2020-04-17 14:33:54,053 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:54,108 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-04-17 14:33:54,108 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:54,109 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:33:54,109 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:54,125 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:54,134 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:54,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:54,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 14:33:54,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292588860] [2020-04-17 14:33:54,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:33:54,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:54,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:33:54,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:33:54,135 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states. [2020-04-17 14:33:54,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:54,813 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2020-04-17 14:33:54,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 14:33:54,813 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 14:33:54,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:54,814 INFO L225 Difference]: With dead ends: 134 [2020-04-17 14:33:54,814 INFO L226 Difference]: Without dead ends: 128 [2020-04-17 14:33:54,814 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-04-17 14:33:54,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-04-17 14:33:54,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-04-17 14:33:54,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-04-17 14:33:54,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions. [2020-04-17 14:33:54,817 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27 [2020-04-17 14:33:54,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:54,817 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 195 transitions. [2020-04-17 14:33:54,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:33:54,818 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions. [2020-04-17 14:33:54,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:33:54,818 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:54,818 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:55,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:55,021 INFO L427 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:55,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:55,022 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times [2020-04-17 14:33:55,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:55,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85568946] [2020-04-17 14:33:55,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:55,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:55,239 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:55,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85568946] [2020-04-17 14:33:55,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042422490] [2020-04-17 14:33:55,239 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:55,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:55,290 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:33:55,290 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:55,299 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:55,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:55,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 14:33:55,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682789335] [2020-04-17 14:33:55,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:33:55,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:55,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:33:55,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:33:55,300 INFO L87 Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states. [2020-04-17 14:33:55,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:55,903 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-04-17 14:33:55,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-04-17 14:33:55,903 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 14:33:55,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:55,904 INFO L225 Difference]: With dead ends: 135 [2020-04-17 14:33:55,904 INFO L226 Difference]: Without dead ends: 129 [2020-04-17 14:33:55,904 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=706, Invalid=1946, Unknown=0, NotChecked=0, Total=2652 [2020-04-17 14:33:55,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-04-17 14:33:55,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-04-17 14:33:55,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 14:33:55,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-04-17 14:33:55,906 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27 [2020-04-17 14:33:55,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:55,907 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-04-17 14:33:55,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:33:55,907 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-04-17 14:33:55,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:33:55,907 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:55,907 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:56,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:56,108 INFO L427 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:56,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:56,108 INFO L82 PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times [2020-04-17 14:33:56,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:56,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301651159] [2020-04-17 14:33:56,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:56,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:56,312 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:56,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301651159] [2020-04-17 14:33:56,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377966125] [2020-04-17 14:33:56,313 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:56,364 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:33:56,365 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:56,366 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:33:56,367 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:56,383 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:56,392 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:56,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:56,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 14:33:56,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669810353] [2020-04-17 14:33:56,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:33:56,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:56,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:33:56,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:33:56,393 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states. [2020-04-17 14:33:57,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:57,122 INFO L93 Difference]: Finished difference Result 132 states and 305 transitions. [2020-04-17 14:33:57,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-17 14:33:57,123 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 14:33:57,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:57,123 INFO L225 Difference]: With dead ends: 132 [2020-04-17 14:33:57,123 INFO L226 Difference]: Without dead ends: 126 [2020-04-17 14:33:57,124 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=712, Invalid=2044, Unknown=0, NotChecked=0, Total=2756 [2020-04-17 14:33:57,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-04-17 14:33:57,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2020-04-17 14:33:57,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 14:33:57,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 201 transitions. [2020-04-17 14:33:57,126 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 201 transitions. Word has length 27 [2020-04-17 14:33:57,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:57,126 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 201 transitions. [2020-04-17 14:33:57,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:33:57,126 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 201 transitions. [2020-04-17 14:33:57,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:33:57,127 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:57,127 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:57,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:57,327 INFO L427 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:57,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:57,328 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 207 times [2020-04-17 14:33:57,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:57,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572073241] [2020-04-17 14:33:57,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:57,521 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:57,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572073241] [2020-04-17 14:33:57,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875040644] [2020-04-17 14:33:57,521 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:57,577 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-04-17 14:33:57,578 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:57,579 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:33:57,580 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:57,590 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:57,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:57,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 14:33:57,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066233798] [2020-04-17 14:33:57,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:33:57,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:57,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:33:57,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:33:57,591 INFO L87 Difference]: Start difference. First operand 80 states and 201 transitions. Second operand 23 states. [2020-04-17 14:33:58,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:58,255 INFO L93 Difference]: Finished difference Result 133 states and 309 transitions. [2020-04-17 14:33:58,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 14:33:58,255 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 14:33:58,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:58,256 INFO L225 Difference]: With dead ends: 133 [2020-04-17 14:33:58,256 INFO L226 Difference]: Without dead ends: 127 [2020-04-17 14:33:58,256 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=774, Invalid=2088, Unknown=0, NotChecked=0, Total=2862 [2020-04-17 14:33:58,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-04-17 14:33:58,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-04-17 14:33:58,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-04-17 14:33:58,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-04-17 14:33:58,259 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 27 [2020-04-17 14:33:58,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:58,259 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-04-17 14:33:58,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:33:58,259 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-04-17 14:33:58,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:33:58,260 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:58,260 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:58,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:58,461 INFO L427 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:58,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:58,461 INFO L82 PathProgramCache]: Analyzing trace with hash 496892893, now seen corresponding path program 208 times [2020-04-17 14:33:58,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:58,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690381135] [2020-04-17 14:33:58,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:58,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:58,653 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:58,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690381135] [2020-04-17 14:33:58,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484015536] [2020-04-17 14:33:58,654 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:58,706 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:33:58,706 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:58,708 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:33:58,708 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:58,723 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:58,733 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:58,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:58,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 14:33:58,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929542388] [2020-04-17 14:33:58,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:33:58,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:58,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:33:58,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:33:58,734 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 24 states. [2020-04-17 14:33:59,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:59,524 INFO L93 Difference]: Finished difference Result 130 states and 303 transitions. [2020-04-17 14:33:59,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-17 14:33:59,524 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 14:33:59,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:59,525 INFO L225 Difference]: With dead ends: 130 [2020-04-17 14:33:59,525 INFO L226 Difference]: Without dead ends: 124 [2020-04-17 14:33:59,526 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2020-04-17 14:33:59,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-04-17 14:33:59,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2020-04-17 14:33:59,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 14:33:59,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-04-17 14:33:59,528 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 27 [2020-04-17 14:33:59,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:59,528 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-04-17 14:33:59,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:33:59,528 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-04-17 14:33:59,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:33:59,529 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:59,529 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:59,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:59,729 INFO L427 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:59,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:59,730 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 209 times [2020-04-17 14:33:59,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:59,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347142798] [2020-04-17 14:33:59,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:59,912 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:59,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347142798] [2020-04-17 14:33:59,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452832803] [2020-04-17 14:33:59,912 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:59,965 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-04-17 14:33:59,965 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:59,966 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:33:59,966 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:59,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:59,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 14:33:59,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564141692] [2020-04-17 14:33:59,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:33:59,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:59,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:33:59,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:33:59,984 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 23 states. [2020-04-17 14:34:00,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:00,697 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-04-17 14:34:00,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-04-17 14:34:00,697 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 14:34:00,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:00,698 INFO L225 Difference]: With dead ends: 131 [2020-04-17 14:34:00,698 INFO L226 Difference]: Without dead ends: 125 [2020-04-17 14:34:00,698 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=858, Invalid=2222, Unknown=0, NotChecked=0, Total=3080 [2020-04-17 14:34:00,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-04-17 14:34:00,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-04-17 14:34:00,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-04-17 14:34:00,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-04-17 14:34:00,701 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 27 [2020-04-17 14:34:00,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:00,702 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-04-17 14:34:00,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:34:00,702 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-04-17 14:34:00,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:34:00,702 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:00,702 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:00,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:00,906 INFO L427 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:00,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:00,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 210 times [2020-04-17 14:34:00,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:00,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556110279] [2020-04-17 14:34:00,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:00,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:01,099 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:01,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556110279] [2020-04-17 14:34:01,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598738006] [2020-04-17 14:34:01,100 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:01,156 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-04-17 14:34:01,156 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:01,157 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:34:01,158 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:01,177 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:01,187 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:01,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:01,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 14:34:01,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720104078] [2020-04-17 14:34:01,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:34:01,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:01,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:34:01,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:34:01,189 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 24 states. [2020-04-17 14:34:02,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:02,058 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-04-17 14:34:02,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-04-17 14:34:02,058 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 14:34:02,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:02,059 INFO L225 Difference]: With dead ends: 128 [2020-04-17 14:34:02,059 INFO L226 Difference]: Without dead ends: 122 [2020-04-17 14:34:02,059 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=866, Invalid=2326, Unknown=0, NotChecked=0, Total=3192 [2020-04-17 14:34:02,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-04-17 14:34:02,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-04-17 14:34:02,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-04-17 14:34:02,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-04-17 14:34:02,061 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 27 [2020-04-17 14:34:02,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:02,062 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-04-17 14:34:02,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:34:02,062 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-04-17 14:34:02,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:34:02,062 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:02,062 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:02,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:02,263 INFO L427 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:02,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:02,264 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 211 times [2020-04-17 14:34:02,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:02,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728947753] [2020-04-17 14:34:02,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:02,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:02,440 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:02,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728947753] [2020-04-17 14:34:02,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693283996] [2020-04-17 14:34:02,441 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:02,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:02,490 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:34:02,490 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:02,502 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:02,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:02,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 14:34:02,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325328623] [2020-04-17 14:34:02,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:34:02,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:02,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:34:02,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:34:02,504 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 23 states. [2020-04-17 14:34:03,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:03,252 INFO L93 Difference]: Finished difference Result 129 states and 305 transitions. [2020-04-17 14:34:03,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-17 14:34:03,252 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 14:34:03,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:03,253 INFO L225 Difference]: With dead ends: 129 [2020-04-17 14:34:03,253 INFO L226 Difference]: Without dead ends: 123 [2020-04-17 14:34:03,253 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=958, Invalid=2348, Unknown=0, NotChecked=0, Total=3306 [2020-04-17 14:34:03,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-04-17 14:34:03,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-04-17 14:34:03,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 14:34:03,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 14:34:03,256 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 27 [2020-04-17 14:34:03,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:03,256 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 14:34:03,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:34:03,256 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 14:34:03,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:34:03,257 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:03,257 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:03,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:03,458 INFO L427 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:03,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:03,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1726955231, now seen corresponding path program 212 times [2020-04-17 14:34:03,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:03,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878816721] [2020-04-17 14:34:03,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:03,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:03,638 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:03,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878816721] [2020-04-17 14:34:03,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820814552] [2020-04-17 14:34:03,639 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:03,686 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:34:03,686 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:03,687 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:34:03,687 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:03,728 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:03,739 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:03,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:03,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 14:34:03,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457630900] [2020-04-17 14:34:03,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:34:03,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:03,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:34:03,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:34:03,740 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 24 states. [2020-04-17 14:34:04,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:04,668 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-04-17 14:34:04,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-04-17 14:34:04,669 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 14:34:04,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:04,669 INFO L225 Difference]: With dead ends: 126 [2020-04-17 14:34:04,669 INFO L226 Difference]: Without dead ends: 120 [2020-04-17 14:34:04,670 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=967, Invalid=2455, Unknown=0, NotChecked=0, Total=3422 [2020-04-17 14:34:04,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-04-17 14:34:04,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-04-17 14:34:04,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 14:34:04,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 14:34:04,672 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 27 [2020-04-17 14:34:04,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:04,672 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 14:34:04,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:34:04,673 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 14:34:04,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:34:04,673 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:04,673 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:04,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:04,874 INFO L427 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:04,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:04,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 213 times [2020-04-17 14:34:04,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:04,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817426851] [2020-04-17 14:34:04,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:04,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:05,048 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:05,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817426851] [2020-04-17 14:34:05,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651925541] [2020-04-17 14:34:05,049 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:05,104 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-04-17 14:34:05,104 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:05,105 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:34:05,106 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:05,119 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:05,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:05,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 14:34:05,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039316596] [2020-04-17 14:34:05,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:34:05,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:05,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:34:05,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:34:05,121 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 23 states. [2020-04-17 14:34:05,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:05,894 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2020-04-17 14:34:05,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-04-17 14:34:05,894 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 14:34:05,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:05,895 INFO L225 Difference]: With dead ends: 127 [2020-04-17 14:34:05,895 INFO L226 Difference]: Without dead ends: 121 [2020-04-17 14:34:05,895 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1074, Invalid=2466, Unknown=0, NotChecked=0, Total=3540 [2020-04-17 14:34:05,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-04-17 14:34:05,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2020-04-17 14:34:05,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-04-17 14:34:05,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-04-17 14:34:05,898 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 27 [2020-04-17 14:34:05,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:05,898 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-04-17 14:34:05,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:34:05,898 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-04-17 14:34:05,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:34:05,899 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:05,899 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:06,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:06,102 INFO L427 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:06,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:06,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1239872381, now seen corresponding path program 214 times [2020-04-17 14:34:06,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:06,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259382474] [2020-04-17 14:34:06,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:06,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:06,272 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:06,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259382474] [2020-04-17 14:34:06,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103286887] [2020-04-17 14:34:06,273 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:06,328 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:34:06,328 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:06,329 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:34:06,330 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:06,347 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:06,359 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:06,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:06,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 14:34:06,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785158672] [2020-04-17 14:34:06,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:34:06,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:06,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:34:06,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:34:06,360 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-04-17 14:34:07,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:07,387 INFO L93 Difference]: Finished difference Result 124 states and 297 transitions. [2020-04-17 14:34:07,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-04-17 14:34:07,388 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 14:34:07,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:07,388 INFO L225 Difference]: With dead ends: 124 [2020-04-17 14:34:07,388 INFO L226 Difference]: Without dead ends: 118 [2020-04-17 14:34:07,389 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1084, Invalid=2576, Unknown=0, NotChecked=0, Total=3660 [2020-04-17 14:34:07,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-04-17 14:34:07,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2020-04-17 14:34:07,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-04-17 14:34:07,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-04-17 14:34:07,391 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 27 [2020-04-17 14:34:07,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:07,392 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-04-17 14:34:07,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:34:07,392 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-04-17 14:34:07,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:34:07,392 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:07,392 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:07,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:07,593 INFO L427 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:07,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:07,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 215 times [2020-04-17 14:34:07,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:07,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506626113] [2020-04-17 14:34:07,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:07,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:07,765 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:07,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506626113] [2020-04-17 14:34:07,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496041352] [2020-04-17 14:34:07,765 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:07,819 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-04-17 14:34:07,819 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:07,820 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:34:07,820 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:07,834 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:07,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:07,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 14:34:07,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557573933] [2020-04-17 14:34:07,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:34:07,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:07,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:34:07,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:34:07,835 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 23 states. [2020-04-17 14:34:08,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:08,645 INFO L93 Difference]: Finished difference Result 144 states and 347 transitions. [2020-04-17 14:34:08,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-04-17 14:34:08,645 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 14:34:08,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:08,646 INFO L225 Difference]: With dead ends: 144 [2020-04-17 14:34:08,646 INFO L226 Difference]: Without dead ends: 138 [2020-04-17 14:34:08,646 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1206, Invalid=2576, Unknown=0, NotChecked=0, Total=3782 [2020-04-17 14:34:08,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-04-17 14:34:08,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2020-04-17 14:34:08,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-04-17 14:34:08,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 245 transitions. [2020-04-17 14:34:08,649 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 245 transitions. Word has length 27 [2020-04-17 14:34:08,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:08,649 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 245 transitions. [2020-04-17 14:34:08,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:34:08,649 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 245 transitions. [2020-04-17 14:34:08,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:34:08,650 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:08,650 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:08,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:08,850 INFO L427 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:08,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:08,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1239365531, now seen corresponding path program 216 times [2020-04-17 14:34:08,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:08,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966224579] [2020-04-17 14:34:08,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:08,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:09,026 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:09,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966224579] [2020-04-17 14:34:09,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352600624] [2020-04-17 14:34:09,027 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:09,084 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-04-17 14:34:09,085 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:09,085 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:34:09,086 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:09,101 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:09,114 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:09,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:09,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 14:34:09,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650165613] [2020-04-17 14:34:09,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:34:09,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:09,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:34:09,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:34:09,115 INFO L87 Difference]: Start difference. First operand 94 states and 245 transitions. Second operand 24 states. [2020-04-17 14:34:10,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:10,131 INFO L93 Difference]: Finished difference Result 125 states and 303 transitions. [2020-04-17 14:34:10,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-04-17 14:34:10,131 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 14:34:10,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:10,132 INFO L225 Difference]: With dead ends: 125 [2020-04-17 14:34:10,132 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 14:34:10,132 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-04-17 14:34:10,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 14:34:10,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-04-17 14:34:10,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-04-17 14:34:10,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-04-17 14:34:10,135 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-04-17 14:34:10,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:10,135 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-04-17 14:34:10,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:34:10,135 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-04-17 14:34:10,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:10,136 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:10,136 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:10,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:10,336 INFO L427 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:10,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:10,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 217 times [2020-04-17 14:34:10,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:10,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853448618] [2020-04-17 14:34:10,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:10,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:10,601 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:10,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853448618] [2020-04-17 14:34:10,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792546963] [2020-04-17 14:34:10,602 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 14:34:10,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:10,658 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:34:10,659 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:10,666 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:10,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:10,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 14:34:10,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563953601] [2020-04-17 14:34:10,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:34:10,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:10,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:34:10,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:34:10,667 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 24 states. [2020-04-17 14:34:11,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:11,110 INFO L93 Difference]: Finished difference Result 144 states and 339 transitions. [2020-04-17 14:34:11,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 14:34:11,110 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 14:34:11,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:11,111 INFO L225 Difference]: With dead ends: 144 [2020-04-17 14:34:11,111 INFO L226 Difference]: Without dead ends: 138 [2020-04-17 14:34:11,111 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=603, Invalid=1377, Unknown=0, NotChecked=0, Total=1980 [2020-04-17 14:34:11,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-04-17 14:34:11,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 93. [2020-04-17 14:34:11,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-17 14:34:11,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-04-17 14:34:11,114 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-04-17 14:34:11,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:11,114 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-04-17 14:34:11,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:34:11,115 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-04-17 14:34:11,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:11,115 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:11,115 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:11,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:11,316 INFO L427 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:11,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:11,317 INFO L82 PathProgramCache]: Analyzing trace with hash 627867998, now seen corresponding path program 218 times [2020-04-17 14:34:11,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:11,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385295991] [2020-04-17 14:34:11,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:11,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:11,573 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:11,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385295991] [2020-04-17 14:34:11,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113640809] [2020-04-17 14:34:11,574 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 14:34:11,623 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:34:11,623 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:11,624 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:34:11,625 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:11,640 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:11,655 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:11,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:11,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 14:34:11,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750604468] [2020-04-17 14:34:11,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:34:11,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:11,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:34:11,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:34:11,656 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-04-17 14:34:12,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:12,148 INFO L93 Difference]: Finished difference Result 141 states and 333 transitions. [2020-04-17 14:34:12,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 14:34:12,149 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 14:34:12,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:12,149 INFO L225 Difference]: With dead ends: 141 [2020-04-17 14:34:12,150 INFO L226 Difference]: Without dead ends: 135 [2020-04-17 14:34:12,150 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=653, Invalid=1603, Unknown=0, NotChecked=0, Total=2256 [2020-04-17 14:34:12,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-04-17 14:34:12,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 92. [2020-04-17 14:34:12,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 14:34:12,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-04-17 14:34:12,152 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-04-17 14:34:12,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:12,153 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-04-17 14:34:12,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:34:12,153 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-04-17 14:34:12,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:12,153 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:12,153 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:12,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:12,354 INFO L427 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:12,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:12,355 INFO L82 PathProgramCache]: Analyzing trace with hash -556056612, now seen corresponding path program 219 times [2020-04-17 14:34:12,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:12,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101813544] [2020-04-17 14:34:12,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:12,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:12,599 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:12,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101813544] [2020-04-17 14:34:12,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762020879] [2020-04-17 14:34:12,599 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 14:34:12,657 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-04-17 14:34:12,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:12,659 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:34:12,660 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:12,668 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:12,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:12,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 14:34:12,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361547963] [2020-04-17 14:34:12,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:34:12,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:12,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:34:12,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:34:12,669 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-04-17 14:34:13,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:13,163 INFO L93 Difference]: Finished difference Result 138 states and 327 transitions. [2020-04-17 14:34:13,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 14:34:13,163 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 14:34:13,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:13,163 INFO L225 Difference]: With dead ends: 138 [2020-04-17 14:34:13,163 INFO L226 Difference]: Without dead ends: 132 [2020-04-17 14:34:13,164 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=608, Invalid=1554, Unknown=0, NotChecked=0, Total=2162 [2020-04-17 14:34:13,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-04-17 14:34:13,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 93. [2020-04-17 14:34:13,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-17 14:34:13,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-04-17 14:34:13,166 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-04-17 14:34:13,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:13,166 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-04-17 14:34:13,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:34:13,166 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-04-17 14:34:13,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:13,167 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:13,167 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:13,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:13,372 INFO L427 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:13,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:13,372 INFO L82 PathProgramCache]: Analyzing trace with hash -2104215232, now seen corresponding path program 220 times [2020-04-17 14:34:13,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:13,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218732218] [2020-04-17 14:34:13,373 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:13,622 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:13,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218732218] [2020-04-17 14:34:13,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075513567] [2020-04-17 14:34:13,623 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 14:34:13,672 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:34:13,672 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:13,674 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:34:13,674 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:13,690 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:13,698 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:13,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:13,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 14:34:13,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664830871] [2020-04-17 14:34:13,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:34:13,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:13,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:34:13,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:34:13,699 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-04-17 14:34:14,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:14,329 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-04-17 14:34:14,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 14:34:14,329 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 14:34:14,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:14,330 INFO L225 Difference]: With dead ends: 137 [2020-04-17 14:34:14,330 INFO L226 Difference]: Without dead ends: 131 [2020-04-17 14:34:14,330 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=665, Invalid=1785, Unknown=0, NotChecked=0, Total=2450 [2020-04-17 14:34:14,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-04-17 14:34:14,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 92. [2020-04-17 14:34:14,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 14:34:14,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-04-17 14:34:14,333 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-04-17 14:34:14,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:14,333 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-04-17 14:34:14,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:34:14,333 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-04-17 14:34:14,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:14,333 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:14,334 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:14,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:14,534 INFO L427 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:14,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:14,535 INFO L82 PathProgramCache]: Analyzing trace with hash 888962878, now seen corresponding path program 221 times [2020-04-17 14:34:14,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:14,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386026214] [2020-04-17 14:34:14,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:14,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:14,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386026214] [2020-04-17 14:34:14,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903754189] [2020-04-17 14:34:14,760 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 14:34:14,812 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-04-17 14:34:14,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:14,813 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:34:14,814 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:14,823 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:14,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:14,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 14:34:14,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221767586] [2020-04-17 14:34:14,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:34:14,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:14,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:34:14,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:34:14,824 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-04-17 14:34:15,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:15,391 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-04-17 14:34:15,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 14:34:15,392 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 14:34:15,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:15,392 INFO L225 Difference]: With dead ends: 134 [2020-04-17 14:34:15,392 INFO L226 Difference]: Without dead ends: 128 [2020-04-17 14:34:15,393 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=629, Invalid=1723, Unknown=0, NotChecked=0, Total=2352 [2020-04-17 14:34:15,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-04-17 14:34:15,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2020-04-17 14:34:15,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-17 14:34:15,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-04-17 14:34:15,395 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-04-17 14:34:15,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:15,396 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-04-17 14:34:15,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:34:15,396 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-04-17 14:34:15,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:15,397 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:15,397 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:15,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:15,600 INFO L427 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:15,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:15,600 INFO L82 PathProgramCache]: Analyzing trace with hash 78414242, now seen corresponding path program 222 times [2020-04-17 14:34:15,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:15,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733541822] [2020-04-17 14:34:15,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:15,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:15,828 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:15,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733541822] [2020-04-17 14:34:15,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030978496] [2020-04-17 14:34:15,828 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 14:34:15,881 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-04-17 14:34:15,881 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:15,882 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:34:15,882 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:15,899 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:15,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:15,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 14:34:15,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419935054] [2020-04-17 14:34:15,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:34:15,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:15,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:34:15,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:34:15,909 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-04-17 14:34:16,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:16,590 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-04-17 14:34:16,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 14:34:16,590 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 14:34:16,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:16,591 INFO L225 Difference]: With dead ends: 133 [2020-04-17 14:34:16,591 INFO L226 Difference]: Without dead ends: 127 [2020-04-17 14:34:16,592 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=693, Invalid=1959, Unknown=0, NotChecked=0, Total=2652 [2020-04-17 14:34:16,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-04-17 14:34:16,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 92. [2020-04-17 14:34:16,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 14:34:16,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-04-17 14:34:16,594 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-04-17 14:34:16,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:16,594 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-04-17 14:34:16,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:34:16,595 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-04-17 14:34:16,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:16,595 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:16,595 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:16,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:16,798 INFO L427 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:16,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:16,799 INFO L82 PathProgramCache]: Analyzing trace with hash 130690848, now seen corresponding path program 223 times [2020-04-17 14:34:16,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:16,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013444659] [2020-04-17 14:34:16,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:17,019 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:17,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013444659] [2020-04-17 14:34:17,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382996258] [2020-04-17 14:34:17,020 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 14:34:17,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:17,068 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:34:17,069 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:17,078 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:17,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:17,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 14:34:17,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104642786] [2020-04-17 14:34:17,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:34:17,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:17,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:34:17,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:34:17,079 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-04-17 14:34:17,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:17,683 INFO L93 Difference]: Finished difference Result 130 states and 311 transitions. [2020-04-17 14:34:17,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 14:34:17,683 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 14:34:17,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:17,684 INFO L225 Difference]: With dead ends: 130 [2020-04-17 14:34:17,684 INFO L226 Difference]: Without dead ends: 124 [2020-04-17 14:34:17,684 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=1884, Unknown=0, NotChecked=0, Total=2550 [2020-04-17 14:34:17,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-04-17 14:34:17,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 93. [2020-04-17 14:34:17,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-17 14:34:17,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-04-17 14:34:17,687 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-04-17 14:34:17,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:17,687 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-04-17 14:34:17,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:34:17,687 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-04-17 14:34:17,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:17,687 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:17,688 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:17,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:17,888 INFO L427 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:17,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:17,889 INFO L82 PathProgramCache]: Analyzing trace with hash 2006940292, now seen corresponding path program 224 times [2020-04-17 14:34:17,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:17,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21865326] [2020-04-17 14:34:17,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:17,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:18,148 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:18,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21865326] [2020-04-17 14:34:18,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070591896] [2020-04-17 14:34:18,148 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 14:34:18,194 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:34:18,195 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:18,196 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:34:18,197 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:18,216 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:18,227 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:18,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:18,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 14:34:18,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895079427] [2020-04-17 14:34:18,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:34:18,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:18,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:34:18,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:34:18,228 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-04-17 14:34:18,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:18,979 INFO L93 Difference]: Finished difference Result 129 states and 309 transitions. [2020-04-17 14:34:18,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-17 14:34:18,980 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 14:34:18,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:18,980 INFO L225 Difference]: With dead ends: 129 [2020-04-17 14:34:18,980 INFO L226 Difference]: Without dead ends: 123 [2020-04-17 14:34:18,981 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=737, Invalid=2125, Unknown=0, NotChecked=0, Total=2862 [2020-04-17 14:34:18,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-04-17 14:34:18,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 92. [2020-04-17 14:34:18,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 14:34:18,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-04-17 14:34:18,984 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-04-17 14:34:18,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:18,984 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-04-17 14:34:18,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:34:18,984 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-04-17 14:34:18,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:18,985 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:18,985 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:19,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:19,186 INFO L427 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:19,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:19,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1599705214, now seen corresponding path program 225 times [2020-04-17 14:34:19,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:19,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338313937] [2020-04-17 14:34:19,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:19,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:19,397 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:19,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338313937] [2020-04-17 14:34:19,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285093702] [2020-04-17 14:34:19,398 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 14:34:19,451 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-04-17 14:34:19,451 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:19,453 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:34:19,453 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:19,464 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:19,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:19,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 14:34:19,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514494099] [2020-04-17 14:34:19,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:34:19,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:19,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:34:19,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:34:19,466 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-04-17 14:34:20,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:20,142 INFO L93 Difference]: Finished difference Result 126 states and 303 transitions. [2020-04-17 14:34:20,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-04-17 14:34:20,142 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 14:34:20,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:20,143 INFO L225 Difference]: With dead ends: 126 [2020-04-17 14:34:20,143 INFO L226 Difference]: Without dead ends: 120 [2020-04-17 14:34:20,143 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=719, Invalid=2037, Unknown=0, NotChecked=0, Total=2756 [2020-04-17 14:34:20,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-04-17 14:34:20,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 93. [2020-04-17 14:34:20,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-17 14:34:20,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-04-17 14:34:20,146 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-04-17 14:34:20,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:20,146 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-04-17 14:34:20,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:34:20,146 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-04-17 14:34:20,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:20,146 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:20,146 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:20,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:20,347 INFO L427 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:20,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:20,348 INFO L82 PathProgramCache]: Analyzing trace with hash -614513690, now seen corresponding path program 226 times [2020-04-17 14:34:20,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:20,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373873788] [2020-04-17 14:34:20,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:20,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:20,562 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:20,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373873788] [2020-04-17 14:34:20,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216484792] [2020-04-17 14:34:20,563 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 14:34:20,610 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:34:20,611 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:20,612 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:34:20,612 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:20,628 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:20,650 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:20,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:20,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 14:34:20,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990053736] [2020-04-17 14:34:20,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:34:20,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:20,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:34:20,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:34:20,651 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-04-17 14:34:21,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:21,474 INFO L93 Difference]: Finished difference Result 125 states and 301 transitions. [2020-04-17 14:34:21,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-17 14:34:21,474 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 14:34:21,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:21,475 INFO L225 Difference]: With dead ends: 125 [2020-04-17 14:34:21,475 INFO L226 Difference]: Without dead ends: 119 [2020-04-17 14:34:21,476 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=797, Invalid=2283, Unknown=0, NotChecked=0, Total=3080 [2020-04-17 14:34:21,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-04-17 14:34:21,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2020-04-17 14:34:21,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 14:34:21,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-04-17 14:34:21,478 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-04-17 14:34:21,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:21,479 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-04-17 14:34:21,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:34:21,479 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-04-17 14:34:21,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:21,479 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:21,479 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:21,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:21,683 INFO L427 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:21,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:21,683 INFO L82 PathProgramCache]: Analyzing trace with hash 2063294564, now seen corresponding path program 227 times [2020-04-17 14:34:21,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:21,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094719026] [2020-04-17 14:34:21,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:21,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:21,884 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:21,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094719026] [2020-04-17 14:34:21,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010973524] [2020-04-17 14:34:21,885 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 14:34:21,944 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-04-17 14:34:21,944 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:21,945 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:34:21,945 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:21,956 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:21,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:21,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 14:34:21,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635877468] [2020-04-17 14:34:21,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:34:21,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:21,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:34:21,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:34:21,958 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-04-17 14:34:22,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:22,639 INFO L93 Difference]: Finished difference Result 122 states and 295 transitions. [2020-04-17 14:34:22,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 14:34:22,640 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 14:34:22,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:22,640 INFO L225 Difference]: With dead ends: 122 [2020-04-17 14:34:22,640 INFO L226 Difference]: Without dead ends: 116 [2020-04-17 14:34:22,641 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=788, Invalid=2182, Unknown=0, NotChecked=0, Total=2970 [2020-04-17 14:34:22,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-04-17 14:34:22,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2020-04-17 14:34:22,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-17 14:34:22,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-04-17 14:34:22,644 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-04-17 14:34:22,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:22,645 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-04-17 14:34:22,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:34:22,645 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-04-17 14:34:22,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:22,645 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:22,646 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:22,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:22,849 INFO L427 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:22,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:22,849 INFO L82 PathProgramCache]: Analyzing trace with hash -974783032, now seen corresponding path program 228 times [2020-04-17 14:34:22,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:22,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464597399] [2020-04-17 14:34:22,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:22,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:23,049 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:23,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464597399] [2020-04-17 14:34:23,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962259521] [2020-04-17 14:34:23,050 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 14:34:23,110 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-04-17 14:34:23,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:23,111 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:34:23,111 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:23,130 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:23,140 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:23,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:23,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 14:34:23,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270960917] [2020-04-17 14:34:23,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:34:23,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:23,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:34:23,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:34:23,141 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-04-17 14:34:24,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:24,030 INFO L93 Difference]: Finished difference Result 121 states and 293 transitions. [2020-04-17 14:34:24,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-04-17 14:34:24,031 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 14:34:24,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:24,031 INFO L225 Difference]: With dead ends: 121 [2020-04-17 14:34:24,032 INFO L226 Difference]: Without dead ends: 115 [2020-04-17 14:34:24,032 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=873, Invalid=2433, Unknown=0, NotChecked=0, Total=3306 [2020-04-17 14:34:24,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-04-17 14:34:24,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2020-04-17 14:34:24,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 14:34:24,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-04-17 14:34:24,034 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-04-17 14:34:24,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:24,035 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-04-17 14:34:24,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:34:24,035 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-04-17 14:34:24,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:24,035 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:24,035 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:24,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:24,236 INFO L427 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:24,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:24,236 INFO L82 PathProgramCache]: Analyzing trace with hash 641409478, now seen corresponding path program 229 times [2020-04-17 14:34:24,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:24,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637020374] [2020-04-17 14:34:24,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:24,439 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:24,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637020374] [2020-04-17 14:34:24,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539228710] [2020-04-17 14:34:24,440 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 14:34:24,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:24,490 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:34:24,490 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:24,503 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:24,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:24,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 14:34:24,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398811729] [2020-04-17 14:34:24,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:34:24,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:24,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:34:24,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:34:24,504 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-04-17 14:34:25,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:25,253 INFO L93 Difference]: Finished difference Result 118 states and 287 transitions. [2020-04-17 14:34:25,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-04-17 14:34:25,254 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 14:34:25,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:25,254 INFO L225 Difference]: With dead ends: 118 [2020-04-17 14:34:25,254 INFO L226 Difference]: Without dead ends: 112 [2020-04-17 14:34:25,255 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=873, Invalid=2319, Unknown=0, NotChecked=0, Total=3192 [2020-04-17 14:34:25,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-04-17 14:34:25,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2020-04-17 14:34:25,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-17 14:34:25,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-04-17 14:34:25,257 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-04-17 14:34:25,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:25,257 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-04-17 14:34:25,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:34:25,257 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-04-17 14:34:25,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:25,258 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:25,258 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:25,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:25,458 INFO L427 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:25,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:25,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1161152554, now seen corresponding path program 230 times [2020-04-17 14:34:25,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:25,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287973837] [2020-04-17 14:34:25,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:25,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:25,659 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:25,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287973837] [2020-04-17 14:34:25,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649897256] [2020-04-17 14:34:25,660 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 14:34:25,708 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:34:25,708 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:25,709 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:34:25,709 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:25,725 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:25,738 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:25,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:25,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 14:34:25,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145344590] [2020-04-17 14:34:25,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:34:25,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:25,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:34:25,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:34:25,739 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-04-17 14:34:26,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:26,711 INFO L93 Difference]: Finished difference Result 117 states and 285 transitions. [2020-04-17 14:34:26,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-04-17 14:34:26,711 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 14:34:26,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:26,712 INFO L225 Difference]: With dead ends: 117 [2020-04-17 14:34:26,712 INFO L226 Difference]: Without dead ends: 111 [2020-04-17 14:34:26,712 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=965, Invalid=2575, Unknown=0, NotChecked=0, Total=3540 [2020-04-17 14:34:26,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-04-17 14:34:26,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2020-04-17 14:34:26,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 14:34:26,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-04-17 14:34:26,714 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-04-17 14:34:26,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:26,715 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-04-17 14:34:26,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:34:26,715 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-04-17 14:34:26,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:26,715 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:26,715 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:26,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:26,916 INFO L427 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:26,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:26,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1478503512, now seen corresponding path program 231 times [2020-04-17 14:34:26,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:26,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756225315] [2020-04-17 14:34:26,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:26,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:27,111 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:27,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756225315] [2020-04-17 14:34:27,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387583444] [2020-04-17 14:34:27,112 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 14:34:27,167 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-04-17 14:34:27,167 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:27,168 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 31 conjunts are in the unsatisfiable core [2020-04-17 14:34:27,168 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:27,182 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:27,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:27,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 14:34:27,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451518607] [2020-04-17 14:34:27,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:34:27,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:27,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:34:27,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:34:27,183 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-04-17 14:34:27,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:27,977 INFO L93 Difference]: Finished difference Result 114 states and 279 transitions. [2020-04-17 14:34:27,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-17 14:34:27,977 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 14:34:27,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:27,978 INFO L225 Difference]: With dead ends: 114 [2020-04-17 14:34:27,978 INFO L226 Difference]: Without dead ends: 108 [2020-04-17 14:34:27,978 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=974, Invalid=2448, Unknown=0, NotChecked=0, Total=3422 [2020-04-17 14:34:27,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-04-17 14:34:27,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2020-04-17 14:34:27,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-17 14:34:27,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-04-17 14:34:27,981 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-04-17 14:34:27,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:27,981 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-04-17 14:34:27,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:34:27,981 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-04-17 14:34:27,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:27,981 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:27,981 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:28,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:28,182 INFO L427 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:28,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:28,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1096336140, now seen corresponding path program 232 times [2020-04-17 14:34:28,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:28,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646226258] [2020-04-17 14:34:28,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:28,375 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:28,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646226258] [2020-04-17 14:34:28,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839086898] [2020-04-17 14:34:28,375 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 14:34:28,423 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:34:28,423 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:28,424 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:34:28,425 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:28,442 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:28,453 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:28,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:28,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 14:34:28,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920706009] [2020-04-17 14:34:28,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:34:28,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:28,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:34:28,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:34:28,454 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-04-17 14:34:29,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:29,500 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-04-17 14:34:29,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-04-17 14:34:29,500 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 14:34:29,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:29,501 INFO L225 Difference]: With dead ends: 113 [2020-04-17 14:34:29,501 INFO L226 Difference]: Without dead ends: 107 [2020-04-17 14:34:29,501 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1073, Invalid=2709, Unknown=0, NotChecked=0, Total=3782 [2020-04-17 14:34:29,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-04-17 14:34:29,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 92. [2020-04-17 14:34:29,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 14:34:29,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-04-17 14:34:29,503 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-04-17 14:34:29,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:29,504 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-04-17 14:34:29,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:34:29,504 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-04-17 14:34:29,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:29,504 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:29,504 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:29,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:29,705 INFO L427 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:29,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:29,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1567331850, now seen corresponding path program 233 times [2020-04-17 14:34:29,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:29,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467560334] [2020-04-17 14:34:29,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:29,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:29,899 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:29,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467560334] [2020-04-17 14:34:29,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153278859] [2020-04-17 14:34:29,900 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 14:34:29,954 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-04-17 14:34:29,954 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:29,955 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:34:29,955 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:29,968 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:29,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:29,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 14:34:29,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683993420] [2020-04-17 14:34:29,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:34:29,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:29,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:34:29,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:34:29,969 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-04-17 14:34:30,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:30,839 INFO L93 Difference]: Finished difference Result 110 states and 271 transitions. [2020-04-17 14:34:30,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-04-17 14:34:30,840 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 14:34:30,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:30,840 INFO L225 Difference]: With dead ends: 110 [2020-04-17 14:34:30,840 INFO L226 Difference]: Without dead ends: 104 [2020-04-17 14:34:30,841 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1091, Invalid=2569, Unknown=0, NotChecked=0, Total=3660 [2020-04-17 14:34:30,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-04-17 14:34:30,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2020-04-17 14:34:30,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-17 14:34:30,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-04-17 14:34:30,843 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-04-17 14:34:30,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:30,843 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-04-17 14:34:30,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:34:30,844 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-04-17 14:34:30,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:30,844 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:30,844 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:31,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:31,045 INFO L427 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:31,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:31,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1583418990, now seen corresponding path program 234 times [2020-04-17 14:34:31,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:31,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403802131] [2020-04-17 14:34:31,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:31,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:31,232 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:31,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403802131] [2020-04-17 14:34:31,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405149734] [2020-04-17 14:34:31,233 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 14:34:31,290 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-04-17 14:34:31,290 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:31,291 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 29 conjunts are in the unsatisfiable core [2020-04-17 14:34:31,291 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:31,323 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:31,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:31,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 14:34:31,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147321459] [2020-04-17 14:34:31,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:34:31,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:31,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:34:31,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:34:31,324 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-04-17 14:34:32,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:32,328 INFO L93 Difference]: Finished difference Result 107 states and 265 transitions. [2020-04-17 14:34:32,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-04-17 14:34:32,328 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 14:34:32,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:32,329 INFO L225 Difference]: With dead ends: 107 [2020-04-17 14:34:32,329 INFO L226 Difference]: Without dead ends: 101 [2020-04-17 14:34:32,329 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1011, Invalid=2771, Unknown=0, NotChecked=0, Total=3782 [2020-04-17 14:34:32,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-04-17 14:34:32,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 92. [2020-04-17 14:34:32,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 14:34:32,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-04-17 14:34:32,331 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-04-17 14:34:32,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:32,332 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-04-17 14:34:32,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:34:32,332 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-04-17 14:34:32,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:32,332 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:32,332 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:32,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:32,533 INFO L427 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:32,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:32,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1583909100, now seen corresponding path program 235 times [2020-04-17 14:34:32,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:32,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151558252] [2020-04-17 14:34:32,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:32,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:32,726 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:32,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151558252] [2020-04-17 14:34:32,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357155167] [2020-04-17 14:34:32,726 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 14:34:32,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:32,774 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:34:32,775 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:32,789 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:32,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:32,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 14:34:32,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554056938] [2020-04-17 14:34:32,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:34:32,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:32,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:34:32,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:34:32,790 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-04-17 14:34:33,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:33,663 INFO L93 Difference]: Finished difference Result 125 states and 309 transitions. [2020-04-17 14:34:33,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-04-17 14:34:33,664 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 14:34:33,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:33,664 INFO L225 Difference]: With dead ends: 125 [2020-04-17 14:34:33,664 INFO L226 Difference]: Without dead ends: 119 [2020-04-17 14:34:33,665 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1224, Invalid=2682, Unknown=0, NotChecked=0, Total=3906 [2020-04-17 14:34:33,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-04-17 14:34:33,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 96. [2020-04-17 14:34:33,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-04-17 14:34:33,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 249 transitions. [2020-04-17 14:34:33,667 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 249 transitions. Word has length 28 [2020-04-17 14:34:33,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:33,667 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 249 transitions. [2020-04-17 14:34:33,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:34:33,668 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 249 transitions. [2020-04-17 14:34:33,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:33,668 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:33,668 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:33,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:33,869 INFO L427 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:33,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:33,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1583925840, now seen corresponding path program 236 times [2020-04-17 14:34:33,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:33,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317383096] [2020-04-17 14:34:33,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:33,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:34,054 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:34,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317383096] [2020-04-17 14:34:34,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958819895] [2020-04-17 14:34:34,055 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 14:34:34,102 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:34:34,103 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:34,104 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:34:34,105 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:34,137 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:34,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:34,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 14:34:34,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59025718] [2020-04-17 14:34:34,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:34:34,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:34,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:34:34,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:34:34,138 INFO L87 Difference]: Start difference. First operand 96 states and 249 transitions. Second operand 25 states. [2020-04-17 14:34:35,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:35,196 INFO L93 Difference]: Finished difference Result 104 states and 261 transitions. [2020-04-17 14:34:35,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-04-17 14:34:35,197 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 14:34:35,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:35,197 INFO L225 Difference]: With dead ends: 104 [2020-04-17 14:34:35,197 INFO L226 Difference]: Without dead ends: 96 [2020-04-17 14:34:35,198 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1121, Invalid=2911, Unknown=0, NotChecked=0, Total=4032 [2020-04-17 14:34:35,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-04-17 14:34:35,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 69. [2020-04-17 14:34:35,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 14:34:35,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 168 transitions. [2020-04-17 14:34:35,200 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 168 transitions. Word has length 28 [2020-04-17 14:34:35,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:35,200 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 168 transitions. [2020-04-17 14:34:35,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:34:35,200 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 168 transitions. [2020-04-17 14:34:35,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:35,200 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:35,200 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:35,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:35,401 INFO L427 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:35,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:35,402 INFO L82 PathProgramCache]: Analyzing trace with hash 234390510, now seen corresponding path program 237 times [2020-04-17 14:34:35,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:35,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494772312] [2020-04-17 14:34:35,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:35,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:35,591 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:35,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494772312] [2020-04-17 14:34:35,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955305487] [2020-04-17 14:34:35,592 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 14:34:35,648 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-04-17 14:34:35,648 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:35,650 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:34:35,650 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:35,668 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:35,682 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:35,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:35,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 14:34:35,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332146743] [2020-04-17 14:34:35,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:34:35,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:35,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:34:35,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:34:35,684 INFO L87 Difference]: Start difference. First operand 69 states and 168 transitions. Second operand 25 states. [2020-04-17 14:34:36,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:36,803 INFO L93 Difference]: Finished difference Result 124 states and 303 transitions. [2020-04-17 14:34:36,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-04-17 14:34:36,803 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 14:34:36,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:36,804 INFO L225 Difference]: With dead ends: 124 [2020-04-17 14:34:36,804 INFO L226 Difference]: Without dead ends: 119 [2020-04-17 14:34:36,804 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1390, Invalid=2900, Unknown=0, NotChecked=0, Total=4290 [2020-04-17 14:34:36,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-04-17 14:34:36,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 94. [2020-04-17 14:34:36,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-04-17 14:34:36,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 241 transitions. [2020-04-17 14:34:36,806 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 241 transitions. Word has length 28 [2020-04-17 14:34:36,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:36,807 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 241 transitions. [2020-04-17 14:34:36,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:34:36,807 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 241 transitions. [2020-04-17 14:34:36,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:34:36,807 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:36,807 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:37,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:37,008 INFO L427 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:37,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:37,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1857077091, now seen corresponding path program 238 times [2020-04-17 14:34:37,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:37,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127698077] [2020-04-17 14:34:37,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:37,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:37,210 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:37,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127698077] [2020-04-17 14:34:37,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924994776] [2020-04-17 14:34:37,210 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 14:34:37,265 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:34:37,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:37,266 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:34:37,267 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:37,283 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:37,299 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:37,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:37,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-04-17 14:34:37,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032851232] [2020-04-17 14:34:37,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:34:37,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:37,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:34:37,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:34:37,300 INFO L87 Difference]: Start difference. First operand 94 states and 241 transitions. Second operand 26 states. [2020-04-17 14:34:38,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:38,504 INFO L93 Difference]: Finished difference Result 102 states and 261 transitions. [2020-04-17 14:34:38,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-04-17 14:34:38,505 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-04-17 14:34:38,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:38,505 INFO L225 Difference]: With dead ends: 102 [2020-04-17 14:34:38,505 INFO L226 Difference]: Without dead ends: 97 [2020-04-17 14:34:38,506 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1409, Invalid=3013, Unknown=0, NotChecked=0, Total=4422 [2020-04-17 14:34:38,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-04-17 14:34:38,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2020-04-17 14:34:38,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-04-17 14:34:38,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 172 transitions. [2020-04-17 14:34:38,508 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 172 transitions. Word has length 29 [2020-04-17 14:34:38,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:38,508 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 172 transitions. [2020-04-17 14:34:38,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:34:38,508 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 172 transitions. [2020-04-17 14:34:38,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:34:38,509 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:38,509 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:38,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:38,712 INFO L427 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:38,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:38,713 INFO L82 PathProgramCache]: Analyzing trace with hash 65865102, now seen corresponding path program 239 times [2020-04-17 14:34:38,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:38,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807693952] [2020-04-17 14:34:38,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:38,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:39,144 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:39,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807693952] [2020-04-17 14:34:39,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668589199] [2020-04-17 14:34:39,145 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 14:34:39,203 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-04-17 14:34:39,203 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:39,205 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:34:39,206 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:39,212 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:39,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:39,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-04-17 14:34:39,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167266593] [2020-04-17 14:34:39,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:34:39,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:39,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:34:39,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:34:39,213 INFO L87 Difference]: Start difference. First operand 70 states and 172 transitions. Second operand 25 states. [2020-04-17 14:34:39,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:39,730 INFO L93 Difference]: Finished difference Result 108 states and 251 transitions. [2020-04-17 14:34:39,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 14:34:39,731 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-04-17 14:34:39,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:39,731 INFO L225 Difference]: With dead ends: 108 [2020-04-17 14:34:39,732 INFO L226 Difference]: Without dead ends: 102 [2020-04-17 14:34:39,732 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=663, Invalid=1407, Unknown=0, NotChecked=0, Total=2070 [2020-04-17 14:34:39,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-04-17 14:34:39,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 78. [2020-04-17 14:34:39,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-04-17 14:34:39,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 191 transitions. [2020-04-17 14:34:39,735 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 191 transitions. Word has length 29 [2020-04-17 14:34:39,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:39,736 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 191 transitions. [2020-04-17 14:34:39,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:34:39,736 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 191 transitions. [2020-04-17 14:34:39,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:34:39,736 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:39,736 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:39,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:39,939 INFO L427 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:39,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:39,940 INFO L82 PathProgramCache]: Analyzing trace with hash -972903182, now seen corresponding path program 240 times [2020-04-17 14:34:39,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:39,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612410568] [2020-04-17 14:34:39,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:39,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:40,220 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:40,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612410568] [2020-04-17 14:34:40,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636603551] [2020-04-17 14:34:40,221 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:40,281 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-04-17 14:34:40,281 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:40,282 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:34:40,283 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:40,300 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:40,308 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:40,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:40,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-04-17 14:34:40,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165234109] [2020-04-17 14:34:40,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:34:40,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:40,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:34:40,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:34:40,309 INFO L87 Difference]: Start difference. First operand 78 states and 191 transitions. Second operand 26 states. [2020-04-17 14:34:40,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:40,867 INFO L93 Difference]: Finished difference Result 130 states and 295 transitions. [2020-04-17 14:34:40,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 14:34:40,868 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-04-17 14:34:40,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:40,868 INFO L225 Difference]: With dead ends: 130 [2020-04-17 14:34:40,869 INFO L226 Difference]: Without dead ends: 124 [2020-04-17 14:34:40,869 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=672, Invalid=1584, Unknown=0, NotChecked=0, Total=2256 [2020-04-17 14:34:40,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-04-17 14:34:40,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 76. [2020-04-17 14:34:40,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-17 14:34:40,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 187 transitions. [2020-04-17 14:34:40,871 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 187 transitions. Word has length 29 [2020-04-17 14:34:40,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:40,871 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 187 transitions. [2020-04-17 14:34:40,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:34:40,872 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 187 transitions. [2020-04-17 14:34:40,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:34:40,872 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:40,872 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:41,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:41,073 INFO L427 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:41,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:41,074 INFO L82 PathProgramCache]: Analyzing trace with hash -558119952, now seen corresponding path program 241 times [2020-04-17 14:34:41,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:41,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871690884] [2020-04-17 14:34:41,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:41,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:41,332 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:41,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871690884] [2020-04-17 14:34:41,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698868619] [2020-04-17 14:34:41,333 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:41,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:41,386 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:34:41,386 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:41,396 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:41,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:41,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-04-17 14:34:41,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025446512] [2020-04-17 14:34:41,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:34:41,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:41,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:34:41,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:34:41,397 INFO L87 Difference]: Start difference. First operand 76 states and 187 transitions. Second operand 25 states. [2020-04-17 14:34:41,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:41,984 INFO L93 Difference]: Finished difference Result 131 states and 299 transitions. [2020-04-17 14:34:41,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 14:34:41,985 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-04-17 14:34:41,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:41,985 INFO L225 Difference]: With dead ends: 131 [2020-04-17 14:34:41,986 INFO L226 Difference]: Without dead ends: 125 [2020-04-17 14:34:41,986 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=674, Invalid=1678, Unknown=0, NotChecked=0, Total=2352 [2020-04-17 14:34:41,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-04-17 14:34:41,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 79. [2020-04-17 14:34:41,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-04-17 14:34:41,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 195 transitions. [2020-04-17 14:34:41,988 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 195 transitions. Word has length 29 [2020-04-17 14:34:41,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:41,989 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 195 transitions. [2020-04-17 14:34:41,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:34:41,989 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 195 transitions. [2020-04-17 14:34:41,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:34:41,989 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:41,989 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:42,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:42,190 INFO L427 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:42,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:42,191 INFO L82 PathProgramCache]: Analyzing trace with hash 2015097940, now seen corresponding path program 242 times [2020-04-17 14:34:42,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:42,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723811214] [2020-04-17 14:34:42,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:42,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:42,467 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:42,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723811214] [2020-04-17 14:34:42,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348442451] [2020-04-17 14:34:42,467 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:42,521 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:34:42,521 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:42,522 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:34:42,522 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:42,540 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:42,551 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:42,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:42,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-04-17 14:34:42,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071891462] [2020-04-17 14:34:42,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:34:42,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:42,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:34:42,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:34:42,552 INFO L87 Difference]: Start difference. First operand 79 states and 195 transitions. Second operand 26 states. [2020-04-17 14:34:43,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:43,175 INFO L93 Difference]: Finished difference Result 149 states and 335 transitions. [2020-04-17 14:34:43,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 14:34:43,175 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-04-17 14:34:43,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:43,176 INFO L225 Difference]: With dead ends: 149 [2020-04-17 14:34:43,176 INFO L226 Difference]: Without dead ends: 143 [2020-04-17 14:34:43,176 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=712, Invalid=1838, Unknown=0, NotChecked=0, Total=2550 [2020-04-17 14:34:43,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-04-17 14:34:43,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 78. [2020-04-17 14:34:43,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-04-17 14:34:43,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 193 transitions. [2020-04-17 14:34:43,179 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 193 transitions. Word has length 29 [2020-04-17 14:34:43,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:43,179 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 193 transitions. [2020-04-17 14:34:43,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:34:43,179 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 193 transitions. [2020-04-17 14:34:43,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:34:43,180 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:43,180 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:43,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:43,381 INFO L427 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:43,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:43,381 INFO L82 PathProgramCache]: Analyzing trace with hash 831173330, now seen corresponding path program 243 times [2020-04-17 14:34:43,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:43,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999329157] [2020-04-17 14:34:43,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:43,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:43,630 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:43,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999329157] [2020-04-17 14:34:43,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057804567] [2020-04-17 14:34:43,631 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:43,700 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-04-17 14:34:43,700 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:43,701 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:34:43,702 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:43,711 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:43,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:43,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-04-17 14:34:43,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46491849] [2020-04-17 14:34:43,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:34:43,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:43,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:34:43,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:34:43,712 INFO L87 Difference]: Start difference. First operand 78 states and 193 transitions. Second operand 25 states. [2020-04-17 14:34:44,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:44,271 INFO L93 Difference]: Finished difference Result 149 states and 337 transitions. [2020-04-17 14:34:44,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 14:34:44,272 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-04-17 14:34:44,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:44,272 INFO L225 Difference]: With dead ends: 149 [2020-04-17 14:34:44,272 INFO L226 Difference]: Without dead ends: 143 [2020-04-17 14:34:44,273 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=728, Invalid=1924, Unknown=0, NotChecked=0, Total=2652 [2020-04-17 14:34:44,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-04-17 14:34:44,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 81. [2020-04-17 14:34:44,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 14:34:44,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 201 transitions. [2020-04-17 14:34:44,275 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 201 transitions. Word has length 29 [2020-04-17 14:34:44,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:44,275 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 201 transitions. [2020-04-17 14:34:44,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:34:44,275 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 201 transitions. [2020-04-17 14:34:44,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:34:44,276 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:44,276 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:44,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:44,476 INFO L427 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:44,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:44,477 INFO L82 PathProgramCache]: Analyzing trace with hash -716985290, now seen corresponding path program 244 times [2020-04-17 14:34:44,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:44,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200937193] [2020-04-17 14:34:44,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:44,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:44,742 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:44,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200937193] [2020-04-17 14:34:44,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155974334] [2020-04-17 14:34:44,743 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:44,796 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:34:44,796 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:44,797 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:34:44,798 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:44,814 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:44,823 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:44,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:44,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-04-17 14:34:44,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600995055] [2020-04-17 14:34:44,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:34:44,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:44,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:34:44,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:34:44,824 INFO L87 Difference]: Start difference. First operand 81 states and 201 transitions. Second operand 26 states. [2020-04-17 14:34:45,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:45,527 INFO L93 Difference]: Finished difference Result 146 states and 331 transitions. [2020-04-17 14:34:45,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 14:34:45,528 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-04-17 14:34:45,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:45,528 INFO L225 Difference]: With dead ends: 146 [2020-04-17 14:34:45,529 INFO L226 Difference]: Without dead ends: 140 [2020-04-17 14:34:45,529 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=731, Invalid=2025, Unknown=0, NotChecked=0, Total=2756 [2020-04-17 14:34:45,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-04-17 14:34:45,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 80. [2020-04-17 14:34:45,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 14:34:45,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 199 transitions. [2020-04-17 14:34:45,531 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 199 transitions. Word has length 29 [2020-04-17 14:34:45,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:45,532 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 199 transitions. [2020-04-17 14:34:45,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:34:45,532 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 199 transitions. [2020-04-17 14:34:45,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:34:45,532 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:45,532 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:45,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:45,733 INFO L427 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:45,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:45,734 INFO L82 PathProgramCache]: Analyzing trace with hash -2018774476, now seen corresponding path program 245 times [2020-04-17 14:34:45,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:45,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213491482] [2020-04-17 14:34:45,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:45,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:45,977 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:45,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213491482] [2020-04-17 14:34:45,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719276201] [2020-04-17 14:34:45,978 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:46,034 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-04-17 14:34:46,035 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:46,036 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:34:46,037 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:46,045 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:46,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:46,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-04-17 14:34:46,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099363097] [2020-04-17 14:34:46,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:34:46,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:46,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:34:46,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:34:46,046 INFO L87 Difference]: Start difference. First operand 80 states and 199 transitions. Second operand 25 states. [2020-04-17 14:34:46,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:46,715 INFO L93 Difference]: Finished difference Result 147 states and 335 transitions. [2020-04-17 14:34:46,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-04-17 14:34:46,715 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-04-17 14:34:46,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:46,716 INFO L225 Difference]: With dead ends: 147 [2020-04-17 14:34:46,716 INFO L226 Difference]: Without dead ends: 141 [2020-04-17 14:34:46,716 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=762, Invalid=2100, Unknown=0, NotChecked=0, Total=2862 [2020-04-17 14:34:46,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-04-17 14:34:46,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 83. [2020-04-17 14:34:46,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-04-17 14:34:46,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 207 transitions. [2020-04-17 14:34:46,718 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 207 transitions. Word has length 29 [2020-04-17 14:34:46,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:46,719 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 207 transitions. [2020-04-17 14:34:46,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:34:46,719 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 207 transitions. [2020-04-17 14:34:46,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:34:46,719 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:46,719 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:46,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:46,920 INFO L427 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:46,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:46,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1465644184, now seen corresponding path program 246 times [2020-04-17 14:34:46,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:46,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303895495] [2020-04-17 14:34:46,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:46,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:47,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303895495] [2020-04-17 14:34:47,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155212989] [2020-04-17 14:34:47,162 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:47,219 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-04-17 14:34:47,220 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:47,221 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:34:47,221 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:47,238 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:47,248 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:47,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:47,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-04-17 14:34:47,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331080824] [2020-04-17 14:34:47,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:34:47,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:47,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:34:47,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:34:47,249 INFO L87 Difference]: Start difference. First operand 83 states and 207 transitions. Second operand 26 states. [2020-04-17 14:34:48,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:48,026 INFO L93 Difference]: Finished difference Result 144 states and 329 transitions. [2020-04-17 14:34:48,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-17 14:34:48,026 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-04-17 14:34:48,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:48,027 INFO L225 Difference]: With dead ends: 144 [2020-04-17 14:34:48,027 INFO L226 Difference]: Without dead ends: 138 [2020-04-17 14:34:48,027 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=766, Invalid=2204, Unknown=0, NotChecked=0, Total=2970 [2020-04-17 14:34:48,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-04-17 14:34:48,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 82. [2020-04-17 14:34:48,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 14:34:48,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 205 transitions. [2020-04-17 14:34:48,029 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 205 transitions. Word has length 29 [2020-04-17 14:34:48,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:48,030 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 205 transitions. [2020-04-17 14:34:48,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:34:48,030 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 205 transitions. [2020-04-17 14:34:48,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:34:48,030 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:48,030 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:48,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:48,231 INFO L427 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:48,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:48,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1517920790, now seen corresponding path program 247 times [2020-04-17 14:34:48,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:48,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369732058] [2020-04-17 14:34:48,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:48,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:48,473 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:48,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369732058] [2020-04-17 14:34:48,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019589535] [2020-04-17 14:34:48,474 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:48,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:48,528 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:34:48,529 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:48,539 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:48,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:48,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-04-17 14:34:48,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032055397] [2020-04-17 14:34:48,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:34:48,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:48,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:34:48,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:34:48,540 INFO L87 Difference]: Start difference. First operand 82 states and 205 transitions. Second operand 25 states. [2020-04-17 14:34:49,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:49,261 INFO L93 Difference]: Finished difference Result 145 states and 333 transitions. [2020-04-17 14:34:49,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 14:34:49,262 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-04-17 14:34:49,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:49,262 INFO L225 Difference]: With dead ends: 145 [2020-04-17 14:34:49,263 INFO L226 Difference]: Without dead ends: 139 [2020-04-17 14:34:49,263 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=812, Invalid=2268, Unknown=0, NotChecked=0, Total=3080 [2020-04-17 14:34:49,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-04-17 14:34:49,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 85. [2020-04-17 14:34:49,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-04-17 14:34:49,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 213 transitions. [2020-04-17 14:34:49,265 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 213 transitions. Word has length 29 [2020-04-17 14:34:49,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:49,266 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 213 transitions. [2020-04-17 14:34:49,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:34:49,266 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 213 transitions. [2020-04-17 14:34:49,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:34:49,266 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:49,266 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:49,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:49,469 INFO L427 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:49,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:49,470 INFO L82 PathProgramCache]: Analyzing trace with hash -900797062, now seen corresponding path program 248 times [2020-04-17 14:34:49,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:49,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220168520] [2020-04-17 14:34:49,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:49,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:49,707 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:49,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220168520] [2020-04-17 14:34:49,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215902065] [2020-04-17 14:34:49,708 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:49,759 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:34:49,760 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:49,761 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:34:49,761 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:49,786 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:49,797 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:49,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:49,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-04-17 14:34:49,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500654439] [2020-04-17 14:34:49,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:34:49,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:49,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:34:49,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:34:49,799 INFO L87 Difference]: Start difference. First operand 85 states and 213 transitions. Second operand 26 states. [2020-04-17 14:34:50,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:50,612 INFO L93 Difference]: Finished difference Result 142 states and 327 transitions. [2020-04-17 14:34:50,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-17 14:34:50,612 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-04-17 14:34:50,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:50,613 INFO L225 Difference]: With dead ends: 142 [2020-04-17 14:34:50,613 INFO L226 Difference]: Without dead ends: 136 [2020-04-17 14:34:50,613 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=817, Invalid=2375, Unknown=0, NotChecked=0, Total=3192 [2020-04-17 14:34:50,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-04-17 14:34:50,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 84. [2020-04-17 14:34:50,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-04-17 14:34:50,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 211 transitions. [2020-04-17 14:34:50,616 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 211 transitions. Word has length 29 [2020-04-17 14:34:50,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:50,616 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 211 transitions. [2020-04-17 14:34:50,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:34:50,616 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 211 transitions. [2020-04-17 14:34:50,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:34:50,616 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:50,616 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:50,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:50,817 INFO L427 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:50,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:50,818 INFO L82 PathProgramCache]: Analyzing trace with hash -212475272, now seen corresponding path program 249 times [2020-04-17 14:34:50,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:50,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034248072] [2020-04-17 14:34:50,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:51,044 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:51,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034248072] [2020-04-17 14:34:51,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341921780] [2020-04-17 14:34:51,045 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:51,104 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-04-17 14:34:51,104 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:51,105 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:34:51,106 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:51,130 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:51,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:51,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-04-17 14:34:51,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370411338] [2020-04-17 14:34:51,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:34:51,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:51,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:34:51,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:34:51,131 INFO L87 Difference]: Start difference. First operand 84 states and 211 transitions. Second operand 25 states. [2020-04-17 14:34:51,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:51,879 INFO L93 Difference]: Finished difference Result 143 states and 331 transitions. [2020-04-17 14:34:51,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-04-17 14:34:51,879 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-04-17 14:34:51,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:51,880 INFO L225 Difference]: With dead ends: 143 [2020-04-17 14:34:51,880 INFO L226 Difference]: Without dead ends: 137 [2020-04-17 14:34:51,880 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=878, Invalid=2428, Unknown=0, NotChecked=0, Total=3306 [2020-04-17 14:34:51,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-04-17 14:34:51,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 87. [2020-04-17 14:34:51,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 14:34:51,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 219 transitions. [2020-04-17 14:34:51,883 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 219 transitions. Word has length 29 [2020-04-17 14:34:51,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:51,883 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 219 transitions. [2020-04-17 14:34:51,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:34:51,883 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 219 transitions. [2020-04-17 14:34:51,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:34:51,884 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:51,884 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:52,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:52,084 INFO L427 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:52,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:52,085 INFO L82 PathProgramCache]: Analyzing trace with hash 772716252, now seen corresponding path program 250 times [2020-04-17 14:34:52,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:52,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055375231] [2020-04-17 14:34:52,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:52,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:52,319 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:52,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055375231] [2020-04-17 14:34:52,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231292220] [2020-04-17 14:34:52,320 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:52,373 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:34:52,373 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:52,374 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:34:52,375 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:52,391 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:52,402 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:52,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:52,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-04-17 14:34:52,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747513840] [2020-04-17 14:34:52,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:34:52,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:52,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:34:52,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:34:52,403 INFO L87 Difference]: Start difference. First operand 87 states and 219 transitions. Second operand 26 states. [2020-04-17 14:34:53,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:53,273 INFO L93 Difference]: Finished difference Result 140 states and 325 transitions. [2020-04-17 14:34:53,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-04-17 14:34:53,273 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-04-17 14:34:53,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:53,274 INFO L225 Difference]: With dead ends: 140 [2020-04-17 14:34:53,274 INFO L226 Difference]: Without dead ends: 134 [2020-04-17 14:34:53,274 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=884, Invalid=2538, Unknown=0, NotChecked=0, Total=3422 [2020-04-17 14:34:53,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-04-17 14:34:53,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 86. [2020-04-17 14:34:53,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 14:34:53,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 217 transitions. [2020-04-17 14:34:53,277 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 217 transitions. Word has length 29 [2020-04-17 14:34:53,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:53,277 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 217 transitions. [2020-04-17 14:34:53,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:34:53,277 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 217 transitions. [2020-04-17 14:34:53,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:34:53,278 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:53,278 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:53,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:53,481 INFO L427 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:53,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:53,481 INFO L82 PathProgramCache]: Analyzing trace with hash -844442790, now seen corresponding path program 251 times [2020-04-17 14:34:53,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:53,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902163180] [2020-04-17 14:34:53,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:53,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:53,700 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:53,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902163180] [2020-04-17 14:34:53,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258883759] [2020-04-17 14:34:53,701 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:53,761 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-04-17 14:34:53,761 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:53,763 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:34:53,764 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:53,782 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:53,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:53,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-04-17 14:34:53,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3059702] [2020-04-17 14:34:53,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:34:53,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:53,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:34:53,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:34:53,783 INFO L87 Difference]: Start difference. First operand 86 states and 217 transitions. Second operand 25 states. [2020-04-17 14:34:54,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:54,584 INFO L93 Difference]: Finished difference Result 141 states and 329 transitions. [2020-04-17 14:34:54,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-17 14:34:54,584 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-04-17 14:34:54,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:54,585 INFO L225 Difference]: With dead ends: 141 [2020-04-17 14:34:54,585 INFO L226 Difference]: Without dead ends: 135 [2020-04-17 14:34:54,585 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=960, Invalid=2580, Unknown=0, NotChecked=0, Total=3540 [2020-04-17 14:34:54,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-04-17 14:34:54,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 89. [2020-04-17 14:34:54,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-04-17 14:34:54,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 225 transitions. [2020-04-17 14:34:54,588 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 225 transitions. Word has length 29 [2020-04-17 14:34:54,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:54,588 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 225 transitions. [2020-04-17 14:34:54,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:34:54,588 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 225 transitions. [2020-04-17 14:34:54,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:34:54,589 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:54,589 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:54,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:54,790 INFO L427 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:54,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:54,790 INFO L82 PathProgramCache]: Analyzing trace with hash 412446910, now seen corresponding path program 252 times [2020-04-17 14:34:54,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:54,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816053069] [2020-04-17 14:34:54,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:54,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:55,009 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:55,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816053069] [2020-04-17 14:34:55,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559442912] [2020-04-17 14:34:55,010 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:55,071 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-04-17 14:34:55,071 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:55,072 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:34:55,073 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:55,089 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:55,101 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:55,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:55,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-04-17 14:34:55,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630725076] [2020-04-17 14:34:55,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:34:55,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:55,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:34:55,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:34:55,102 INFO L87 Difference]: Start difference. First operand 89 states and 225 transitions. Second operand 26 states. [2020-04-17 14:34:56,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:56,090 INFO L93 Difference]: Finished difference Result 138 states and 323 transitions. [2020-04-17 14:34:56,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-04-17 14:34:56,090 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-04-17 14:34:56,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:56,091 INFO L225 Difference]: With dead ends: 138 [2020-04-17 14:34:56,091 INFO L226 Difference]: Without dead ends: 132 [2020-04-17 14:34:56,092 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=967, Invalid=2693, Unknown=0, NotChecked=0, Total=3660 [2020-04-17 14:34:56,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-04-17 14:34:56,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 88. [2020-04-17 14:34:56,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-04-17 14:34:56,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 223 transitions. [2020-04-17 14:34:56,095 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 223 transitions. Word has length 29 [2020-04-17 14:34:56,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:56,095 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 223 transitions. [2020-04-17 14:34:56,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:34:56,095 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 223 transitions. [2020-04-17 14:34:56,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:34:56,095 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:56,095 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:56,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:56,298 INFO L427 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:56,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:56,299 INFO L82 PathProgramCache]: Analyzing trace with hash 2028639420, now seen corresponding path program 253 times [2020-04-17 14:34:56,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:56,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904791587] [2020-04-17 14:34:56,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:56,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:56,515 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:56,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904791587] [2020-04-17 14:34:56,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715056994] [2020-04-17 14:34:56,515 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:56,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:56,573 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:34:56,573 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:56,589 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:56,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:56,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-04-17 14:34:56,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982302571] [2020-04-17 14:34:56,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:34:56,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:56,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:34:56,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:34:56,591 INFO L87 Difference]: Start difference. First operand 88 states and 223 transitions. Second operand 25 states. [2020-04-17 14:34:57,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:57,434 INFO L93 Difference]: Finished difference Result 139 states and 327 transitions. [2020-04-17 14:34:57,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-04-17 14:34:57,434 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-04-17 14:34:57,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:57,435 INFO L225 Difference]: With dead ends: 139 [2020-04-17 14:34:57,435 INFO L226 Difference]: Without dead ends: 133 [2020-04-17 14:34:57,436 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1058, Invalid=2724, Unknown=0, NotChecked=0, Total=3782 [2020-04-17 14:34:57,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-04-17 14:34:57,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 91. [2020-04-17 14:34:57,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-04-17 14:34:57,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 231 transitions. [2020-04-17 14:34:57,438 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 231 transitions. Word has length 29 [2020-04-17 14:34:57,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:57,438 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 231 transitions. [2020-04-17 14:34:57,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:34:57,438 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 231 transitions. [2020-04-17 14:34:57,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:34:57,438 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:57,438 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:57,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:57,642 INFO L427 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:57,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:57,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1746584800, now seen corresponding path program 254 times [2020-04-17 14:34:57,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:57,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264151572] [2020-04-17 14:34:57,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:57,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:57,860 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:57,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264151572] [2020-04-17 14:34:57,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175744605] [2020-04-17 14:34:57,860 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:57,916 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:34:57,916 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:57,917 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:34:57,918 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:57,934 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:57,947 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:57,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:57,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-04-17 14:34:57,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020114891] [2020-04-17 14:34:57,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:34:57,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:57,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:34:57,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:34:57,948 INFO L87 Difference]: Start difference. First operand 91 states and 231 transitions. Second operand 26 states. [2020-04-17 14:34:58,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:58,976 INFO L93 Difference]: Finished difference Result 136 states and 321 transitions. [2020-04-17 14:34:58,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-04-17 14:34:58,978 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-04-17 14:34:58,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:58,979 INFO L225 Difference]: With dead ends: 136 [2020-04-17 14:34:58,979 INFO L226 Difference]: Without dead ends: 130 [2020-04-17 14:34:58,979 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1066, Invalid=2840, Unknown=0, NotChecked=0, Total=3906 [2020-04-17 14:34:58,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-04-17 14:34:58,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 90. [2020-04-17 14:34:58,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-04-17 14:34:58,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 229 transitions. [2020-04-17 14:34:58,982 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 229 transitions. Word has length 29 [2020-04-17 14:34:58,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:58,982 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 229 transitions. [2020-04-17 14:34:58,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:34:58,982 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 229 transitions. [2020-04-17 14:34:58,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:34:58,982 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:58,983 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:59,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:59,186 INFO L427 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:59,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:59,186 INFO L82 PathProgramCache]: Analyzing trace with hash -91273570, now seen corresponding path program 255 times [2020-04-17 14:34:59,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:59,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128826405] [2020-04-17 14:34:59,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:59,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:59,403 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:59,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128826405] [2020-04-17 14:34:59,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385082204] [2020-04-17 14:34:59,404 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:59,460 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-04-17 14:34:59,460 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:59,461 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:34:59,462 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:59,482 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:59,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:59,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-04-17 14:34:59,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008717456] [2020-04-17 14:34:59,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:34:59,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:59,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:34:59,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:34:59,483 INFO L87 Difference]: Start difference. First operand 90 states and 229 transitions. Second operand 25 states. [2020-04-17 14:35:00,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:00,370 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-04-17 14:35:00,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-04-17 14:35:00,371 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-04-17 14:35:00,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:00,371 INFO L225 Difference]: With dead ends: 137 [2020-04-17 14:35:00,371 INFO L226 Difference]: Without dead ends: 131 [2020-04-17 14:35:00,372 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1172, Invalid=2860, Unknown=0, NotChecked=0, Total=4032 [2020-04-17 14:35:00,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-04-17 14:35:00,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2020-04-17 14:35:00,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-17 14:35:00,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-04-17 14:35:00,374 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 29 [2020-04-17 14:35:00,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:00,374 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-04-17 14:35:00,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:35:00,375 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-04-17 14:35:00,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:35:00,375 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:00,375 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:00,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:00,576 INFO L427 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:00,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:00,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1811401214, now seen corresponding path program 256 times [2020-04-17 14:35:00,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:00,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383266997] [2020-04-17 14:35:00,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:00,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:00,793 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:00,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383266997] [2020-04-17 14:35:00,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874833910] [2020-04-17 14:35:00,793 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:00,846 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:35:00,847 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:00,848 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:35:00,848 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:00,865 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:35:00,877 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:00,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:00,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-04-17 14:35:00,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737887271] [2020-04-17 14:35:00,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:35:00,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:00,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:35:00,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:35:00,878 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 26 states. [2020-04-17 14:35:02,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:02,002 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-04-17 14:35:02,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-04-17 14:35:02,003 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-04-17 14:35:02,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:02,003 INFO L225 Difference]: With dead ends: 134 [2020-04-17 14:35:02,003 INFO L226 Difference]: Without dead ends: 128 [2020-04-17 14:35:02,004 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1181, Invalid=2979, Unknown=0, NotChecked=0, Total=4160 [2020-04-17 14:35:02,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-04-17 14:35:02,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 92. [2020-04-17 14:35:02,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 14:35:02,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-04-17 14:35:02,006 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 29 [2020-04-17 14:35:02,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:02,006 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-04-17 14:35:02,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:35:02,006 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-04-17 14:35:02,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:35:02,007 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:02,007 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:02,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:02,207 INFO L427 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:02,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:02,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1340405504, now seen corresponding path program 257 times [2020-04-17 14:35:02,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:02,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398475488] [2020-04-17 14:35:02,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:02,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:02,420 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:02,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398475488] [2020-04-17 14:35:02,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114022473] [2020-04-17 14:35:02,421 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:02,479 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-04-17 14:35:02,480 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:02,481 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:35:02,482 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:02,496 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:02,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:02,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-04-17 14:35:02,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147201310] [2020-04-17 14:35:02,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:35:02,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:02,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:35:02,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:35:02,497 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 25 states. [2020-04-17 14:35:03,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:03,445 INFO L93 Difference]: Finished difference Result 135 states and 323 transitions. [2020-04-17 14:35:03,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-04-17 14:35:03,446 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-04-17 14:35:03,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:03,447 INFO L225 Difference]: With dead ends: 135 [2020-04-17 14:35:03,447 INFO L226 Difference]: Without dead ends: 129 [2020-04-17 14:35:03,447 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1302, Invalid=2988, Unknown=0, NotChecked=0, Total=4290 [2020-04-17 14:35:03,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-04-17 14:35:03,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 95. [2020-04-17 14:35:03,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-04-17 14:35:03,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 243 transitions. [2020-04-17 14:35:03,450 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 243 transitions. Word has length 29 [2020-04-17 14:35:03,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:03,451 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 243 transitions. [2020-04-17 14:35:03,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:35:03,451 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 243 transitions. [2020-04-17 14:35:03,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:35:03,451 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:03,451 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:03,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:03,655 INFO L427 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:03,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:03,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1324318364, now seen corresponding path program 258 times [2020-04-17 14:35:03,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:03,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41755699] [2020-04-17 14:35:03,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:03,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:03,876 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:03,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41755699] [2020-04-17 14:35:03,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115695082] [2020-04-17 14:35:03,877 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:03,940 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-04-17 14:35:03,940 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:03,942 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:35:03,943 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:03,961 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:35:03,974 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:03,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:03,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-04-17 14:35:03,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60733386] [2020-04-17 14:35:03,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:35:03,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:03,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:35:03,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:35:03,975 INFO L87 Difference]: Start difference. First operand 95 states and 243 transitions. Second operand 26 states. [2020-04-17 14:35:05,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:05,158 INFO L93 Difference]: Finished difference Result 132 states and 317 transitions. [2020-04-17 14:35:05,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-04-17 14:35:05,158 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-04-17 14:35:05,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:05,159 INFO L225 Difference]: With dead ends: 132 [2020-04-17 14:35:05,159 INFO L226 Difference]: Without dead ends: 126 [2020-04-17 14:35:05,159 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1312, Invalid=3110, Unknown=0, NotChecked=0, Total=4422 [2020-04-17 14:35:05,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-04-17 14:35:05,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 94. [2020-04-17 14:35:05,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-04-17 14:35:05,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 241 transitions. [2020-04-17 14:35:05,162 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 241 transitions. Word has length 29 [2020-04-17 14:35:05,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:05,162 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 241 transitions. [2020-04-17 14:35:05,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:35:05,162 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 241 transitions. [2020-04-17 14:35:05,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:35:05,163 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:05,163 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:05,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:05,363 INFO L427 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:05,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:05,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1323828254, now seen corresponding path program 259 times [2020-04-17 14:35:05,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:05,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633914522] [2020-04-17 14:35:05,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:05,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:05,566 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:05,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633914522] [2020-04-17 14:35:05,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780659709] [2020-04-17 14:35:05,567 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:05,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:05,623 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:35:05,624 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:05,646 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:05,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:05,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-04-17 14:35:05,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394785114] [2020-04-17 14:35:05,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:35:05,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:05,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:35:05,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:35:05,647 INFO L87 Difference]: Start difference. First operand 94 states and 241 transitions. Second operand 25 states. [2020-04-17 14:35:06,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:06,637 INFO L93 Difference]: Finished difference Result 152 states and 367 transitions. [2020-04-17 14:35:06,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-04-17 14:35:06,638 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-04-17 14:35:06,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:06,638 INFO L225 Difference]: With dead ends: 152 [2020-04-17 14:35:06,638 INFO L226 Difference]: Without dead ends: 146 [2020-04-17 14:35:06,639 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1448, Invalid=3108, Unknown=0, NotChecked=0, Total=4556 [2020-04-17 14:35:06,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-04-17 14:35:06,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2020-04-17 14:35:06,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-04-17 14:35:06,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 261 transitions. [2020-04-17 14:35:06,642 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 261 transitions. Word has length 29 [2020-04-17 14:35:06,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:06,642 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 261 transitions. [2020-04-17 14:35:06,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:35:06,642 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 261 transitions. [2020-04-17 14:35:06,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:35:06,643 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:06,643 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:06,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:06,846 INFO L427 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:06,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:06,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1323811514, now seen corresponding path program 260 times [2020-04-17 14:35:06,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:06,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195840383] [2020-04-17 14:35:06,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:06,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:07,051 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:07,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195840383] [2020-04-17 14:35:07,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521397097] [2020-04-17 14:35:07,052 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:07,105 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:35:07,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:07,107 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 26 conjunts are in the unsatisfiable core [2020-04-17 14:35:07,107 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:07,146 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:07,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:07,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-04-17 14:35:07,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819373643] [2020-04-17 14:35:07,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:35:07,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:07,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:35:07,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:35:07,147 INFO L87 Difference]: Start difference. First operand 100 states and 261 transitions. Second operand 26 states. [2020-04-17 14:35:08,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:08,266 INFO L93 Difference]: Finished difference Result 133 states and 323 transitions. [2020-04-17 14:35:08,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-04-17 14:35:08,267 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-04-17 14:35:08,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:08,267 INFO L225 Difference]: With dead ends: 133 [2020-04-17 14:35:08,268 INFO L226 Difference]: Without dead ends: 125 [2020-04-17 14:35:08,268 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1321, Invalid=3371, Unknown=0, NotChecked=0, Total=4692 [2020-04-17 14:35:08,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-04-17 14:35:08,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 97. [2020-04-17 14:35:08,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-04-17 14:35:08,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 249 transitions. [2020-04-17 14:35:08,271 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 249 transitions. Word has length 29 [2020-04-17 14:35:08,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:08,271 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 249 transitions. [2020-04-17 14:35:08,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:35:08,272 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 249 transitions. [2020-04-17 14:35:08,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-17 14:35:08,272 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:08,273 INFO L425 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:08,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:08,476 INFO L427 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:08,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:08,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1170458439, now seen corresponding path program 261 times [2020-04-17 14:35:08,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:08,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775067394] [2020-04-17 14:35:08,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:08,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:08,767 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:08,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775067394] [2020-04-17 14:35:08,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24949090] [2020-04-17 14:35:08,768 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:08,826 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-04-17 14:35:08,827 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:08,828 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-04-17 14:35:08,828 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:08,836 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:08,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:08,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-04-17 14:35:08,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174834481] [2020-04-17 14:35:08,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:35:08,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:08,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:35:08,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:35:08,837 INFO L87 Difference]: Start difference. First operand 97 states and 249 transitions. Second operand 26 states. [2020-04-17 14:35:09,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:09,355 INFO L93 Difference]: Finished difference Result 154 states and 363 transitions. [2020-04-17 14:35:09,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 14:35:09,356 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-04-17 14:35:09,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:09,356 INFO L225 Difference]: With dead ends: 154 [2020-04-17 14:35:09,357 INFO L226 Difference]: Without dead ends: 148 [2020-04-17 14:35:09,357 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=717, Invalid=1635, Unknown=0, NotChecked=0, Total=2352 [2020-04-17 14:35:09,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-04-17 14:35:09,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 99. [2020-04-17 14:35:09,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 14:35:09,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-04-17 14:35:09,360 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-04-17 14:35:09,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:09,360 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-04-17 14:35:09,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:35:09,360 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-04-17 14:35:09,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-17 14:35:09,361 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:09,361 INFO L425 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:09,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:09,561 INFO L427 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:09,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:09,562 INFO L82 PathProgramCache]: Analyzing trace with hash 2085740573, now seen corresponding path program 262 times [2020-04-17 14:35:09,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:09,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411674935] [2020-04-17 14:35:09,563 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:09,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:09,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411674935] [2020-04-17 14:35:09,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765099959] [2020-04-17 14:35:09,852 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:09,904 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:35:09,904 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:09,905 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-04-17 14:35:09,905 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:09,922 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:35:09,931 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:09,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:09,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-04-17 14:35:09,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40027715] [2020-04-17 14:35:09,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-04-17 14:35:09,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:09,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-04-17 14:35:09,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2020-04-17 14:35:09,933 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-04-17 14:35:10,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:10,601 INFO L93 Difference]: Finished difference Result 151 states and 357 transitions. [2020-04-17 14:35:10,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 14:35:10,602 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-04-17 14:35:10,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:10,602 INFO L225 Difference]: With dead ends: 151 [2020-04-17 14:35:10,602 INFO L226 Difference]: Without dead ends: 145 [2020-04-17 14:35:10,603 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=770, Invalid=1882, Unknown=0, NotChecked=0, Total=2652 [2020-04-17 14:35:10,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-04-17 14:35:10,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 98. [2020-04-17 14:35:10,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-04-17 14:35:10,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-04-17 14:35:10,605 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-04-17 14:35:10,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:10,605 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-04-17 14:35:10,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-04-17 14:35:10,605 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-04-17 14:35:10,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-17 14:35:10,606 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:10,606 INFO L425 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:10,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:10,806 INFO L427 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:10,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:10,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1794443493, now seen corresponding path program 263 times [2020-04-17 14:35:10,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:10,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242807809] [2020-04-17 14:35:10,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:10,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:11,094 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:11,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242807809] [2020-04-17 14:35:11,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968312824] [2020-04-17 14:35:11,095 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:11,154 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-04-17 14:35:11,154 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:11,155 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-04-17 14:35:11,156 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:11,164 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:11,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:11,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-04-17 14:35:11,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340890878] [2020-04-17 14:35:11,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:35:11,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:11,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:35:11,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:35:11,165 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-04-17 14:35:11,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:11,782 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-04-17 14:35:11,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 14:35:11,782 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-04-17 14:35:11,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:11,783 INFO L225 Difference]: With dead ends: 148 [2020-04-17 14:35:11,783 INFO L226 Difference]: Without dead ends: 142 [2020-04-17 14:35:11,784 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=720, Invalid=1830, Unknown=0, NotChecked=0, Total=2550 [2020-04-17 14:35:11,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-04-17 14:35:11,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 99. [2020-04-17 14:35:11,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 14:35:11,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-04-17 14:35:11,786 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-04-17 14:35:11,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:11,786 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-04-17 14:35:11,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:35:11,786 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-04-17 14:35:11,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-17 14:35:11,787 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:11,787 INFO L425 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:11,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:11,989 INFO L427 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:11,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:11,990 INFO L82 PathProgramCache]: Analyzing trace with hash 778774399, now seen corresponding path program 264 times [2020-04-17 14:35:11,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:11,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808462518] [2020-04-17 14:35:11,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:12,271 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:12,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808462518] [2020-04-17 14:35:12,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624320505] [2020-04-17 14:35:12,272 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:12,333 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-04-17 14:35:12,334 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:12,335 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-04-17 14:35:12,336 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:12,353 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:35:12,362 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:12,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:12,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-04-17 14:35:12,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670892091] [2020-04-17 14:35:12,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-04-17 14:35:12,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:12,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-04-17 14:35:12,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2020-04-17 14:35:12,363 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-04-17 14:35:13,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:13,084 INFO L93 Difference]: Finished difference Result 147 states and 349 transitions. [2020-04-17 14:35:13,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 14:35:13,085 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-04-17 14:35:13,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:13,085 INFO L225 Difference]: With dead ends: 147 [2020-04-17 14:35:13,086 INFO L226 Difference]: Without dead ends: 141 [2020-04-17 14:35:13,086 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=2082, Unknown=0, NotChecked=0, Total=2862 [2020-04-17 14:35:13,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-04-17 14:35:13,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 98. [2020-04-17 14:35:13,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-04-17 14:35:13,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-04-17 14:35:13,089 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-04-17 14:35:13,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:13,089 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-04-17 14:35:13,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-04-17 14:35:13,089 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-04-17 14:35:13,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-17 14:35:13,089 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:13,089 INFO L425 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:13,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:13,290 INFO L427 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:13,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:13,290 INFO L82 PathProgramCache]: Analyzing trace with hash -405150211, now seen corresponding path program 265 times [2020-04-17 14:35:13,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:13,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740948127] [2020-04-17 14:35:13,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:13,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:13,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740948127] [2020-04-17 14:35:13,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684576052] [2020-04-17 14:35:13,566 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:13,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:13,621 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-04-17 14:35:13,621 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:13,631 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:13,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:13,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-04-17 14:35:13,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779844129] [2020-04-17 14:35:13,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:35:13,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:13,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:35:13,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:35:13,632 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-04-17 14:35:14,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:14,294 INFO L93 Difference]: Finished difference Result 144 states and 343 transitions. [2020-04-17 14:35:14,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 14:35:14,294 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-04-17 14:35:14,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:14,295 INFO L225 Difference]: With dead ends: 144 [2020-04-17 14:35:14,295 INFO L226 Difference]: Without dead ends: 138 [2020-04-17 14:35:14,295 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=739, Invalid=2017, Unknown=0, NotChecked=0, Total=2756 [2020-04-17 14:35:14,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-04-17 14:35:14,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 99. [2020-04-17 14:35:14,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 14:35:14,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-04-17 14:35:14,298 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-04-17 14:35:14,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:14,298 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-04-17 14:35:14,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:35:14,298 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-04-17 14:35:14,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-17 14:35:14,298 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:14,298 INFO L425 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:14,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:14,499 INFO L427 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:14,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:14,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1953308831, now seen corresponding path program 266 times [2020-04-17 14:35:14,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:14,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314248992] [2020-04-17 14:35:14,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:14,775 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:14,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314248992] [2020-04-17 14:35:14,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94701684] [2020-04-17 14:35:14,775 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:14,828 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:35:14,828 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:14,829 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-04-17 14:35:14,829 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:14,848 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:35:14,856 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:14,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:14,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-04-17 14:35:14,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670252021] [2020-04-17 14:35:14,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-04-17 14:35:14,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:14,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-04-17 14:35:14,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2020-04-17 14:35:14,857 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-04-17 14:35:15,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:15,671 INFO L93 Difference]: Finished difference Result 143 states and 341 transitions. [2020-04-17 14:35:15,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-17 14:35:15,672 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-04-17 14:35:15,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:15,672 INFO L225 Difference]: With dead ends: 143 [2020-04-17 14:35:15,673 INFO L226 Difference]: Without dead ends: 137 [2020-04-17 14:35:15,673 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=806, Invalid=2274, Unknown=0, NotChecked=0, Total=3080 [2020-04-17 14:35:15,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-04-17 14:35:15,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 98. [2020-04-17 14:35:15,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-04-17 14:35:15,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-04-17 14:35:15,676 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-04-17 14:35:15,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:15,676 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-04-17 14:35:15,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-04-17 14:35:15,676 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-04-17 14:35:15,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-17 14:35:15,676 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:15,677 INFO L425 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:15,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:15,877 INFO L427 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:15,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:15,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1039869279, now seen corresponding path program 267 times [2020-04-17 14:35:15,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:15,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159437689] [2020-04-17 14:35:15,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:15,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:16,150 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:16,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159437689] [2020-04-17 14:35:16,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365669804] [2020-04-17 14:35:16,151 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:16,208 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-04-17 14:35:16,209 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:16,209 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-04-17 14:35:16,210 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:16,221 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:16,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:16,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-04-17 14:35:16,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779796203] [2020-04-17 14:35:16,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:35:16,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:16,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:35:16,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:35:16,222 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-04-17 14:35:16,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:16,925 INFO L93 Difference]: Finished difference Result 140 states and 335 transitions. [2020-04-17 14:35:16,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-04-17 14:35:16,925 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-04-17 14:35:16,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:16,926 INFO L225 Difference]: With dead ends: 140 [2020-04-17 14:35:16,926 INFO L226 Difference]: Without dead ends: 134 [2020-04-17 14:35:16,926 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=774, Invalid=2196, Unknown=0, NotChecked=0, Total=2970 [2020-04-17 14:35:16,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-04-17 14:35:16,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 99. [2020-04-17 14:35:16,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 14:35:16,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-04-17 14:35:16,929 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-04-17 14:35:16,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:16,929 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-04-17 14:35:16,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:35:16,929 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-04-17 14:35:16,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-17 14:35:16,929 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:16,929 INFO L425 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:17,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:17,130 INFO L427 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:17,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:17,131 INFO L82 PathProgramCache]: Analyzing trace with hash 229320643, now seen corresponding path program 268 times [2020-04-17 14:35:17,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:17,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906298411] [2020-04-17 14:35:17,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:17,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:17,400 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:17,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906298411] [2020-04-17 14:35:17,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757566622] [2020-04-17 14:35:17,401 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:17,451 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:35:17,451 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:17,452 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-04-17 14:35:17,453 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:17,472 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:35:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:17,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:17,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-04-17 14:35:17,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162098956] [2020-04-17 14:35:17,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-04-17 14:35:17,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:17,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-04-17 14:35:17,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2020-04-17 14:35:17,483 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-04-17 14:35:18,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:18,356 INFO L93 Difference]: Finished difference Result 139 states and 333 transitions. [2020-04-17 14:35:18,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-17 14:35:18,356 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-04-17 14:35:18,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:18,357 INFO L225 Difference]: With dead ends: 139 [2020-04-17 14:35:18,357 INFO L226 Difference]: Without dead ends: 133 [2020-04-17 14:35:18,357 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=848, Invalid=2458, Unknown=0, NotChecked=0, Total=3306 [2020-04-17 14:35:18,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-04-17 14:35:18,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 98. [2020-04-17 14:35:18,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-04-17 14:35:18,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-04-17 14:35:18,359 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-04-17 14:35:18,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:18,360 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-04-17 14:35:18,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-04-17 14:35:18,360 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-04-17 14:35:18,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-17 14:35:18,360 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:18,360 INFO L425 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:18,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:18,561 INFO L427 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:18,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:18,562 INFO L82 PathProgramCache]: Analyzing trace with hash 281597249, now seen corresponding path program 269 times [2020-04-17 14:35:18,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:18,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853142716] [2020-04-17 14:35:18,563 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:18,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:18,835 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:18,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853142716] [2020-04-17 14:35:18,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219953046] [2020-04-17 14:35:18,835 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:18,896 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-04-17 14:35:18,897 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:18,898 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-04-17 14:35:18,899 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:18,929 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:18,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:18,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-04-17 14:35:18,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466097770] [2020-04-17 14:35:18,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:35:18,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:18,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:35:18,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:35:18,930 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-04-17 14:35:19,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:19,679 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-04-17 14:35:19,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 14:35:19,680 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-04-17 14:35:19,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:19,680 INFO L225 Difference]: With dead ends: 136 [2020-04-17 14:35:19,681 INFO L226 Difference]: Without dead ends: 130 [2020-04-17 14:35:19,681 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=825, Invalid=2367, Unknown=0, NotChecked=0, Total=3192 [2020-04-17 14:35:19,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-04-17 14:35:19,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 99. [2020-04-17 14:35:19,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 14:35:19,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-04-17 14:35:19,684 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-04-17 14:35:19,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:19,684 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-04-17 14:35:19,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:35:19,684 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-04-17 14:35:19,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-17 14:35:19,685 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:19,685 INFO L425 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:19,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:19,885 INFO L427 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:19,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:19,886 INFO L82 PathProgramCache]: Analyzing trace with hash -2137120603, now seen corresponding path program 270 times [2020-04-17 14:35:19,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:19,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146849334] [2020-04-17 14:35:19,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:19,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:20,152 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:20,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146849334] [2020-04-17 14:35:20,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443473801] [2020-04-17 14:35:20,153 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:20,214 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-04-17 14:35:20,215 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:20,215 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-04-17 14:35:20,216 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:20,236 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:35:20,245 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:20,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:20,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-04-17 14:35:20,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343815246] [2020-04-17 14:35:20,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-04-17 14:35:20,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:20,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-04-17 14:35:20,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2020-04-17 14:35:20,246 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-04-17 14:35:21,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:21,174 INFO L93 Difference]: Finished difference Result 135 states and 325 transitions. [2020-04-17 14:35:21,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-04-17 14:35:21,175 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-04-17 14:35:21,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:21,175 INFO L225 Difference]: With dead ends: 135 [2020-04-17 14:35:21,176 INFO L226 Difference]: Without dead ends: 129 [2020-04-17 14:35:21,176 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=906, Invalid=2634, Unknown=0, NotChecked=0, Total=3540 [2020-04-17 14:35:21,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-04-17 14:35:21,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 98. [2020-04-17 14:35:21,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-04-17 14:35:21,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-04-17 14:35:21,178 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-04-17 14:35:21,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:21,179 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-04-17 14:35:21,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-04-17 14:35:21,179 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-04-17 14:35:21,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-17 14:35:21,179 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:21,180 INFO L425 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:21,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:21,380 INFO L427 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:21,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:21,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1448798813, now seen corresponding path program 271 times [2020-04-17 14:35:21,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:21,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143415765] [2020-04-17 14:35:21,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:21,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:21,623 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:21,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143415765] [2020-04-17 14:35:21,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806389734] [2020-04-17 14:35:21,624 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:21,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:21,678 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-04-17 14:35:21,679 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:21,694 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:21,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:21,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-04-17 14:35:21,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554783377] [2020-04-17 14:35:21,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:35:21,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:21,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:35:21,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:35:21,695 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-04-17 14:35:22,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:22,504 INFO L93 Difference]: Finished difference Result 132 states and 319 transitions. [2020-04-17 14:35:22,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-04-17 14:35:22,505 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-04-17 14:35:22,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:22,505 INFO L225 Difference]: With dead ends: 132 [2020-04-17 14:35:22,505 INFO L226 Difference]: Without dead ends: 126 [2020-04-17 14:35:22,506 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=892, Invalid=2530, Unknown=0, NotChecked=0, Total=3422 [2020-04-17 14:35:22,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-04-17 14:35:22,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 99. [2020-04-17 14:35:22,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 14:35:22,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-04-17 14:35:22,508 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-04-17 14:35:22,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:22,509 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-04-17 14:35:22,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:35:22,509 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-04-17 14:35:22,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-17 14:35:22,509 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:22,509 INFO L425 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:22,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:22,710 INFO L427 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:22,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:22,711 INFO L82 PathProgramCache]: Analyzing trace with hash -463607289, now seen corresponding path program 272 times [2020-04-17 14:35:22,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:22,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898378200] [2020-04-17 14:35:22,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:22,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:22,961 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:22,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898378200] [2020-04-17 14:35:22,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648372750] [2020-04-17 14:35:22,962 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:23,015 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:35:23,016 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:23,017 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-04-17 14:35:23,017 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:23,034 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:35:23,045 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:23,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:23,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-04-17 14:35:23,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53068083] [2020-04-17 14:35:23,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-04-17 14:35:23,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:23,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-04-17 14:35:23,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2020-04-17 14:35:23,046 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-04-17 14:35:24,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:24,071 INFO L93 Difference]: Finished difference Result 131 states and 317 transitions. [2020-04-17 14:35:24,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-04-17 14:35:24,072 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-04-17 14:35:24,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:24,072 INFO L225 Difference]: With dead ends: 131 [2020-04-17 14:35:24,072 INFO L226 Difference]: Without dead ends: 125 [2020-04-17 14:35:24,073 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=980, Invalid=2802, Unknown=0, NotChecked=0, Total=3782 [2020-04-17 14:35:24,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-04-17 14:35:24,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 98. [2020-04-17 14:35:24,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-04-17 14:35:24,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-04-17 14:35:24,075 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-04-17 14:35:24,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:24,076 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-04-17 14:35:24,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-04-17 14:35:24,076 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-04-17 14:35:24,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-17 14:35:24,076 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:24,076 INFO L425 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:24,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:24,277 INFO L427 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:24,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:24,278 INFO L82 PathProgramCache]: Analyzing trace with hash -2080766331, now seen corresponding path program 273 times [2020-04-17 14:35:24,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:24,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933420974] [2020-04-17 14:35:24,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:24,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:24,532 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:24,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933420974] [2020-04-17 14:35:24,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516590913] [2020-04-17 14:35:24,532 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:24,593 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-04-17 14:35:24,593 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:24,594 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-04-17 14:35:24,595 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:24,608 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:24,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:24,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-04-17 14:35:24,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619795588] [2020-04-17 14:35:24,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:35:24,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:24,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:35:24,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:35:24,609 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-04-17 14:35:25,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:25,481 INFO L93 Difference]: Finished difference Result 128 states and 311 transitions. [2020-04-17 14:35:25,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-17 14:35:25,482 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-04-17 14:35:25,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:25,482 INFO L225 Difference]: With dead ends: 128 [2020-04-17 14:35:25,482 INFO L226 Difference]: Without dead ends: 122 [2020-04-17 14:35:25,483 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=975, Invalid=2685, Unknown=0, NotChecked=0, Total=3660 [2020-04-17 14:35:25,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-04-17 14:35:25,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 99. [2020-04-17 14:35:25,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 14:35:25,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-04-17 14:35:25,485 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-04-17 14:35:25,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:25,486 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-04-17 14:35:25,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:35:25,486 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-04-17 14:35:25,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-17 14:35:25,487 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:25,487 INFO L425 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:25,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:25,689 INFO L427 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:25,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:25,689 INFO L82 PathProgramCache]: Analyzing trace with hash -823876631, now seen corresponding path program 274 times [2020-04-17 14:35:25,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:25,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310567906] [2020-04-17 14:35:25,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:25,925 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:25,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310567906] [2020-04-17 14:35:25,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328545517] [2020-04-17 14:35:25,925 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:25,979 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:35:25,980 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:25,980 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-04-17 14:35:25,981 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:25,998 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:35:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:26,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:26,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-04-17 14:35:26,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749580382] [2020-04-17 14:35:26,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-04-17 14:35:26,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:26,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-04-17 14:35:26,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2020-04-17 14:35:26,010 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-04-17 14:35:27,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:27,088 INFO L93 Difference]: Finished difference Result 127 states and 309 transitions. [2020-04-17 14:35:27,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-04-17 14:35:27,089 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-04-17 14:35:27,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:27,089 INFO L225 Difference]: With dead ends: 127 [2020-04-17 14:35:27,090 INFO L226 Difference]: Without dead ends: 121 [2020-04-17 14:35:27,090 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1070, Invalid=2962, Unknown=0, NotChecked=0, Total=4032 [2020-04-17 14:35:27,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-04-17 14:35:27,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 98. [2020-04-17 14:35:27,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-04-17 14:35:27,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-04-17 14:35:27,092 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-04-17 14:35:27,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:27,093 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-04-17 14:35:27,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-04-17 14:35:27,093 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-04-17 14:35:27,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-17 14:35:27,093 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:27,094 INFO L425 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:27,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:27,294 INFO L427 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:27,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:27,295 INFO L82 PathProgramCache]: Analyzing trace with hash 792315879, now seen corresponding path program 275 times [2020-04-17 14:35:27,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:27,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706044119] [2020-04-17 14:35:27,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:27,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:27,518 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:27,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706044119] [2020-04-17 14:35:27,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367415505] [2020-04-17 14:35:27,519 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:27,577 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-04-17 14:35:27,577 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:27,578 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-04-17 14:35:27,578 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:27,591 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:27,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:27,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-04-17 14:35:27,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813058965] [2020-04-17 14:35:27,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:35:27,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:27,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:35:27,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:35:27,592 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-04-17 14:35:28,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:28,495 INFO L93 Difference]: Finished difference Result 124 states and 303 transitions. [2020-04-17 14:35:28,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-04-17 14:35:28,496 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-04-17 14:35:28,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:28,496 INFO L225 Difference]: With dead ends: 124 [2020-04-17 14:35:28,496 INFO L226 Difference]: Without dead ends: 118 [2020-04-17 14:35:28,497 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1074, Invalid=2832, Unknown=0, NotChecked=0, Total=3906 [2020-04-17 14:35:28,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-04-17 14:35:28,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 99. [2020-04-17 14:35:28,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 14:35:28,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-04-17 14:35:28,499 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-04-17 14:35:28,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:28,500 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-04-17 14:35:28,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:35:28,500 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-04-17 14:35:28,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-17 14:35:28,500 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:28,500 INFO L425 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:28,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:28,701 INFO L427 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:28,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:28,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1312058955, now seen corresponding path program 276 times [2020-04-17 14:35:28,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:28,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426037130] [2020-04-17 14:35:28,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:28,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:28,932 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:28,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426037130] [2020-04-17 14:35:28,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546711796] [2020-04-17 14:35:28,933 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:28,993 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-04-17 14:35:28,993 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:28,994 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-04-17 14:35:28,994 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:29,013 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:35:29,024 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:29,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:29,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-04-17 14:35:29,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047651710] [2020-04-17 14:35:29,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-04-17 14:35:29,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:29,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-04-17 14:35:29,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-04-17 14:35:29,025 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-04-17 14:35:30,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:30,193 INFO L93 Difference]: Finished difference Result 123 states and 301 transitions. [2020-04-17 14:35:30,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-04-17 14:35:30,193 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-04-17 14:35:30,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:30,194 INFO L225 Difference]: With dead ends: 123 [2020-04-17 14:35:30,194 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 14:35:30,195 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1176, Invalid=3114, Unknown=0, NotChecked=0, Total=4290 [2020-04-17 14:35:30,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 14:35:30,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-04-17 14:35:30,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-04-17 14:35:30,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-04-17 14:35:30,197 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-04-17 14:35:30,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:30,197 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-04-17 14:35:30,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-04-17 14:35:30,198 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-04-17 14:35:30,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-17 14:35:30,198 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:30,198 INFO L425 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:30,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:30,399 INFO L427 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:30,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:30,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1327597111, now seen corresponding path program 277 times [2020-04-17 14:35:30,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:30,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252494061] [2020-04-17 14:35:30,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:30,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:30,625 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:30,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252494061] [2020-04-17 14:35:30,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282800370] [2020-04-17 14:35:30,626 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:30,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:30,676 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-04-17 14:35:30,676 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:30,689 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:30,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:30,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-04-17 14:35:30,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140873576] [2020-04-17 14:35:30,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:35:30,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:30,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:35:30,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:35:30,691 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-04-17 14:35:31,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:31,658 INFO L93 Difference]: Finished difference Result 120 states and 295 transitions. [2020-04-17 14:35:31,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-04-17 14:35:31,659 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-04-17 14:35:31,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:31,659 INFO L225 Difference]: With dead ends: 120 [2020-04-17 14:35:31,659 INFO L226 Difference]: Without dead ends: 114 [2020-04-17 14:35:31,660 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1189, Invalid=2971, Unknown=0, NotChecked=0, Total=4160 [2020-04-17 14:35:31,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-04-17 14:35:31,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 99. [2020-04-17 14:35:31,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 14:35:31,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-04-17 14:35:31,662 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-04-17 14:35:31,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:31,662 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-04-17 14:35:31,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:35:31,663 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-04-17 14:35:31,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-17 14:35:31,663 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:31,663 INFO L425 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:31,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:31,864 INFO L427 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:31,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:31,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1247242541, now seen corresponding path program 278 times [2020-04-17 14:35:31,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:31,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173143954] [2020-04-17 14:35:31,865 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:31,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:32,087 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:32,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173143954] [2020-04-17 14:35:32,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039447643] [2020-04-17 14:35:32,087 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:32,139 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:35:32,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:32,141 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-04-17 14:35:32,141 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:32,164 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:35:32,177 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:32,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:32,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-04-17 14:35:32,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735478880] [2020-04-17 14:35:32,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-04-17 14:35:32,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:32,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-04-17 14:35:32,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2020-04-17 14:35:32,178 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-04-17 14:35:33,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:33,418 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-04-17 14:35:33,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-04-17 14:35:33,418 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-04-17 14:35:33,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:33,419 INFO L225 Difference]: With dead ends: 119 [2020-04-17 14:35:33,419 INFO L226 Difference]: Without dead ends: 113 [2020-04-17 14:35:33,419 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1298, Invalid=3258, Unknown=0, NotChecked=0, Total=4556 [2020-04-17 14:35:33,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-04-17 14:35:33,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 98. [2020-04-17 14:35:33,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-04-17 14:35:33,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-04-17 14:35:33,422 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-04-17 14:35:33,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:33,422 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-04-17 14:35:33,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-04-17 14:35:33,422 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-04-17 14:35:33,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-17 14:35:33,422 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:33,422 INFO L425 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:33,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:33,623 INFO L427 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:33,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:33,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1718238251, now seen corresponding path program 279 times [2020-04-17 14:35:33,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:33,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958614806] [2020-04-17 14:35:33,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:33,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:33,846 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:33,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958614806] [2020-04-17 14:35:33,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106459234] [2020-04-17 14:35:33,847 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:33,910 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-04-17 14:35:33,910 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:33,911 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-04-17 14:35:33,912 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:33,927 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:33,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:33,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-04-17 14:35:33,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451668826] [2020-04-17 14:35:33,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:35:33,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:33,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:35:33,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:35:33,928 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-04-17 14:35:34,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:34,933 INFO L93 Difference]: Finished difference Result 116 states and 287 transitions. [2020-04-17 14:35:34,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-04-17 14:35:34,934 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-04-17 14:35:34,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:34,934 INFO L225 Difference]: With dead ends: 116 [2020-04-17 14:35:34,934 INFO L226 Difference]: Without dead ends: 110 [2020-04-17 14:35:34,935 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1320, Invalid=3102, Unknown=0, NotChecked=0, Total=4422 [2020-04-17 14:35:34,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-04-17 14:35:34,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 99. [2020-04-17 14:35:34,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 14:35:34,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-04-17 14:35:34,937 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-04-17 14:35:34,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:34,937 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-04-17 14:35:34,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:35:34,938 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-04-17 14:35:34,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-17 14:35:34,938 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:34,938 INFO L425 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:35,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:35,139 INFO L427 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:35,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:35,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1734325391, now seen corresponding path program 280 times [2020-04-17 14:35:35,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:35,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716261832] [2020-04-17 14:35:35,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:35,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:35,352 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:35,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716261832] [2020-04-17 14:35:35,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393842213] [2020-04-17 14:35:35,353 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:35,406 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:35:35,407 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:35,408 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-04-17 14:35:35,408 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:35,427 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:35:35,440 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:35,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:35,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-04-17 14:35:35,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002506458] [2020-04-17 14:35:35,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-04-17 14:35:35,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:35,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-04-17 14:35:35,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2020-04-17 14:35:35,441 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-04-17 14:35:36,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:36,762 INFO L93 Difference]: Finished difference Result 115 states and 285 transitions. [2020-04-17 14:35:36,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-04-17 14:35:36,763 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-04-17 14:35:36,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:36,763 INFO L225 Difference]: With dead ends: 115 [2020-04-17 14:35:36,763 INFO L226 Difference]: Without dead ends: 109 [2020-04-17 14:35:36,764 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1436, Invalid=3394, Unknown=0, NotChecked=0, Total=4830 [2020-04-17 14:35:36,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-04-17 14:35:36,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 98. [2020-04-17 14:35:36,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-04-17 14:35:36,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-04-17 14:35:36,766 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-04-17 14:35:36,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:36,767 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-04-17 14:35:36,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-04-17 14:35:36,767 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-04-17 14:35:36,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-17 14:35:36,767 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:36,767 INFO L425 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:36,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:36,968 INFO L427 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:36,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:36,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1734815501, now seen corresponding path program 281 times [2020-04-17 14:35:36,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:36,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684003574] [2020-04-17 14:35:36,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:36,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:37,197 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:37,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684003574] [2020-04-17 14:35:37,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220219238] [2020-04-17 14:35:37,198 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:37,260 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-04-17 14:35:37,261 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:37,262 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-04-17 14:35:37,262 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:37,278 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:37,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:37,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-04-17 14:35:37,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654750564] [2020-04-17 14:35:37,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:35:37,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:37,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:35:37,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:35:37,279 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-04-17 14:35:38,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:38,325 INFO L93 Difference]: Finished difference Result 131 states and 325 transitions. [2020-04-17 14:35:38,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-04-17 14:35:38,325 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-04-17 14:35:38,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:38,326 INFO L225 Difference]: With dead ends: 131 [2020-04-17 14:35:38,326 INFO L226 Difference]: Without dead ends: 125 [2020-04-17 14:35:38,327 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1467, Invalid=3225, Unknown=0, NotChecked=0, Total=4692 [2020-04-17 14:35:38,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-04-17 14:35:38,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 102. [2020-04-17 14:35:38,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-04-17 14:35:38,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 265 transitions. [2020-04-17 14:35:38,329 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 265 transitions. Word has length 30 [2020-04-17 14:35:38,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:38,330 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 265 transitions. [2020-04-17 14:35:38,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:35:38,330 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 265 transitions. [2020-04-17 14:35:38,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-17 14:35:38,330 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:38,330 INFO L425 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:38,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:38,531 INFO L427 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:38,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:38,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1734832241, now seen corresponding path program 282 times [2020-04-17 14:35:38,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:38,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209474948] [2020-04-17 14:35:38,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:38,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:38,749 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:38,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209474948] [2020-04-17 14:35:38,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177442281] [2020-04-17 14:35:38,750 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:38,815 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-04-17 14:35:38,816 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:38,816 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-04-17 14:35:38,817 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:38,857 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:35:38,871 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:38,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:38,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-04-17 14:35:38,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012887119] [2020-04-17 14:35:38,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-04-17 14:35:38,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:38,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-04-17 14:35:38,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2020-04-17 14:35:38,872 INFO L87 Difference]: Start difference. First operand 102 states and 265 transitions. Second operand 27 states. [2020-04-17 14:35:40,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:40,207 INFO L93 Difference]: Finished difference Result 112 states and 281 transitions. [2020-04-17 14:35:40,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-04-17 14:35:40,208 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-04-17 14:35:40,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:40,208 INFO L225 Difference]: With dead ends: 112 [2020-04-17 14:35:40,209 INFO L226 Difference]: Without dead ends: 104 [2020-04-17 14:35:40,209 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1357 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1590, Invalid=3522, Unknown=0, NotChecked=0, Total=5112 [2020-04-17 14:35:40,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-04-17 14:35:40,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 73. [2020-04-17 14:35:40,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-04-17 14:35:40,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 178 transitions. [2020-04-17 14:35:40,211 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 178 transitions. Word has length 30 [2020-04-17 14:35:40,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:40,211 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 178 transitions. [2020-04-17 14:35:40,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-04-17 14:35:40,211 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 178 transitions. [2020-04-17 14:35:40,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-17 14:35:40,212 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:40,212 INFO L425 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:40,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:40,412 INFO L427 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:40,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:40,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1911532333, now seen corresponding path program 283 times [2020-04-17 14:35:40,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:40,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459656857] [2020-04-17 14:35:40,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:40,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:40,642 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:40,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459656857] [2020-04-17 14:35:40,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632625568] [2020-04-17 14:35:40,642 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:40,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:40,701 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-04-17 14:35:40,701 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:40,719 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:35:40,734 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:40,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:40,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-04-17 14:35:40,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87625114] [2020-04-17 14:35:40,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-04-17 14:35:40,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:40,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-04-17 14:35:40,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2020-04-17 14:35:40,735 INFO L87 Difference]: Start difference. First operand 73 states and 178 transitions. Second operand 27 states. Received shutdown request... [2020-04-17 14:35:41,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-04-17 14:35:42,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:42,101 WARN L544 AbstractCegarLoop]: Verification canceled [2020-04-17 14:35:42,106 WARN L228 ceAbstractionStarter]: Timeout [2020-04-17 14:35:42,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.04 02:35:42 BasicIcfg [2020-04-17 14:35:42,107 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-17 14:35:42,108 INFO L168 Benchmark]: Toolchain (without parser) took 286810.62 ms. Allocated memory was 137.9 MB in the beginning and 213.4 MB in the end (delta: 75.5 MB). Free memory was 101.0 MB in the beginning and 155.6 MB in the end (delta: -54.6 MB). Peak memory consumption was 20.9 MB. Max. memory is 7.1 GB. [2020-04-17 14:35:42,109 INFO L168 Benchmark]: CDTParser took 1.34 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-04-17 14:35:42,109 INFO L168 Benchmark]: CACSL2BoogieTranslator took 699.48 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 99.1 MB in the beginning and 159.3 MB in the end (delta: -60.2 MB). Peak memory consumption was 24.5 MB. Max. memory is 7.1 GB. [2020-04-17 14:35:42,110 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.08 ms. Allocated memory is still 201.9 MB. Free memory was 159.3 MB in the beginning and 157.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-04-17 14:35:42,110 INFO L168 Benchmark]: Boogie Preprocessor took 24.17 ms. Allocated memory is still 201.9 MB. Free memory was 157.2 MB in the beginning and 155.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-04-17 14:35:42,111 INFO L168 Benchmark]: RCFGBuilder took 400.46 ms. Allocated memory is still 201.9 MB. Free memory was 155.9 MB in the beginning and 135.4 MB in the end (delta: 20.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. [2020-04-17 14:35:42,111 INFO L168 Benchmark]: TraceAbstraction took 285602.95 ms. Allocated memory was 201.9 MB in the beginning and 213.4 MB in the end (delta: 11.5 MB). Free memory was 135.4 MB in the beginning and 155.6 MB in the end (delta: -20.2 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-04-17 14:35:42,114 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.34 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 699.48 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 99.1 MB in the beginning and 159.3 MB in the end (delta: -60.2 MB). Peak memory consumption was 24.5 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 57.08 ms. Allocated memory is still 201.9 MB. Free memory was 159.3 MB in the beginning and 157.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.17 ms. Allocated memory is still 201.9 MB. Free memory was 157.2 MB in the beginning and 155.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 400.46 ms. Allocated memory is still 201.9 MB. Free memory was 155.9 MB in the beginning and 135.4 MB in the end (delta: 20.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 285602.95 ms. Allocated memory was 201.9 MB in the beginning and 213.4 MB in the end (delta: 11.5 MB). Free memory was 135.4 MB in the beginning and 155.6 MB in the end (delta: -20.2 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.5s, 57 ProgramPointsBefore, 20 ProgramPointsAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 486 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 703]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 703). Cancelled while BasicCegarLoop was constructing difference of abstraction (73states) and FLOYD_HOARE automaton (currently 44 states, 27 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 69 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 285.4s, OverallIterations: 285, TraceHistogramMax: 11, AutomataDifference: 158.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.6s, HoareTripleCheckerStatistics: 4528 SDtfs, 16727 SDslu, 32967 SDs, 0 SdLazy, 35700 SolverSat, 21018 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 36.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17498 GetRequests, 5690 SyntacticMatches, 280 SemanticMatches, 11527 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129880 ImplicationChecksByTransitivity, 157.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=102occurred in iteration=283, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 284 MinimizatonAttempts, 7728 StatesRemovedByMinimization, 283 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.2s SsaConstructionTime, 6.5s SatisfiabilityAnalysisTime, 50.1s InterpolantComputationTime, 12844 NumberOfCodeBlocks, 12844 NumberOfCodeBlocksAsserted, 1593 NumberOfCheckSat, 12279 ConstructedInterpolants, 0 QuantifiedInterpolants, 1292821 SizeOfPredicates, 4174 NumberOfNonLiveVariables, 38720 ConjunctsInSsa, 5337 ConjunctsInUnsatCore, 565 InterpolantComputations, 5 PerfectInterpolantSequences, 0/30690 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown