/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-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-bf4350c [2020-09-16 14:08:04,891 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-16 14:08:04,895 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-16 14:08:04,938 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-16 14:08:04,938 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-16 14:08:04,941 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-16 14:08:04,946 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-16 14:08:04,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-16 14:08:04,954 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-16 14:08:04,958 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-16 14:08:04,959 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-16 14:08:04,960 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-16 14:08:04,960 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-16 14:08:04,964 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-16 14:08:04,965 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-16 14:08:04,971 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-16 14:08:04,972 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-16 14:08:04,974 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-16 14:08:04,976 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-16 14:08:04,978 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-16 14:08:04,980 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-16 14:08:04,981 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-16 14:08:04,982 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-16 14:08:04,983 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-16 14:08:04,986 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-16 14:08:05,003 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-16 14:08:05,004 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-16 14:08:05,005 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-16 14:08:05,006 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-16 14:08:05,007 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-16 14:08:05,007 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-16 14:08:05,008 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-16 14:08:05,008 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-16 14:08:05,008 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-16 14:08:05,009 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-16 14:08:05,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-16 14:08:05,013 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 [2020-09-16 14:08:05,039 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-16 14:08:05,040 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-16 14:08:05,041 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-16 14:08:05,042 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-16 14:08:05,042 INFO L138 SettingsManager]: * Use SBE=true [2020-09-16 14:08:05,042 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-16 14:08:05,042 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-16 14:08:05,043 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-16 14:08:05,043 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-16 14:08:05,043 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-16 14:08:05,043 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-16 14:08:05,043 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-16 14:08:05,044 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-16 14:08:05,044 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-16 14:08:05,044 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-16 14:08:05,044 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-16 14:08:05,044 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-16 14:08:05,045 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-16 14:08:05,045 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-16 14:08:05,045 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-16 14:08:05,045 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-16 14:08:05,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-16 14:08:05,046 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-16 14:08:05,046 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-16 14:08:05,046 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-16 14:08:05,047 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-16 14:08:05,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-16 14:08:05,047 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-16 14:08:05,047 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-16 14:08:05,047 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-16 14:08:05,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-16 14:08:05,524 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-16 14:08:05,528 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-16 14:08:05,530 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-16 14:08:05,530 INFO L275 PluginConnector]: CDTParser initialized [2020-09-16 14:08:05,532 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2020-09-16 14:08:05,629 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a82cea825/ca6dd3a19d4a4bdcafbded647368a442/FLAGc32db5943 [2020-09-16 14:08:06,273 INFO L306 CDTParser]: Found 1 translation units. [2020-09-16 14:08:06,274 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2020-09-16 14:08:06,293 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a82cea825/ca6dd3a19d4a4bdcafbded647368a442/FLAGc32db5943 [2020-09-16 14:08:06,539 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a82cea825/ca6dd3a19d4a4bdcafbded647368a442 [2020-09-16 14:08:06,554 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-16 14:08:06,563 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-16 14:08:06,564 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-16 14:08:06,564 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-16 14:08:06,568 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-16 14:08:06,570 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 02:08:06" (1/1) ... [2020-09-16 14:08:06,575 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a78f426 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:06, skipping insertion in model container [2020-09-16 14:08:06,575 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 02:08:06" (1/1) ... [2020-09-16 14:08:06,585 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-16 14:08:06,657 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-16 14:08:07,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-16 14:08:07,239 INFO L203 MainTranslator]: Completed pre-run [2020-09-16 14:08:07,302 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-16 14:08:07,383 INFO L208 MainTranslator]: Completed translation [2020-09-16 14:08:07,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:07 WrapperNode [2020-09-16 14:08:07,384 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-16 14:08:07,386 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-16 14:08:07,386 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-16 14:08:07,386 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-16 14:08:07,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:07" (1/1) ... [2020-09-16 14:08:07,424 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:07" (1/1) ... [2020-09-16 14:08:07,451 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-16 14:08:07,451 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-16 14:08:07,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-16 14:08:07,452 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-16 14:08:07,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:07" (1/1) ... [2020-09-16 14:08:07,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:07" (1/1) ... [2020-09-16 14:08:07,464 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:07" (1/1) ... [2020-09-16 14:08:07,465 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:07" (1/1) ... [2020-09-16 14:08:07,477 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:07" (1/1) ... [2020-09-16 14:08:07,483 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:07" (1/1) ... [2020-09-16 14:08:07,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:07" (1/1) ... [2020-09-16 14:08:07,489 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-16 14:08:07,490 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-16 14:08:07,490 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-16 14:08:07,490 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-16 14:08:07,491 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:07" (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 [2020-09-16 14:08:07,576 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-16 14:08:07,576 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-16 14:08:07,577 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-16 14:08:07,577 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-16 14:08:07,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-16 14:08:07,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-16 14:08:07,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-16 14:08:07,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-16 14:08:07,578 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-16 14:08:07,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-16 14:08:07,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-16 14:08:07,580 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-16 14:08:07,965 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-16 14:08:07,966 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-16 14:08:07,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 02:08:07 BoogieIcfgContainer [2020-09-16 14:08:07,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-16 14:08:07,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-16 14:08:07,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-16 14:08:07,976 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-16 14:08:07,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 02:08:06" (1/3) ... [2020-09-16 14:08:07,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e5ed36b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 02:08:07, skipping insertion in model container [2020-09-16 14:08:07,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:07" (2/3) ... [2020-09-16 14:08:07,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e5ed36b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 02:08:07, skipping insertion in model container [2020-09-16 14:08:07,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 02:08:07" (3/3) ... [2020-09-16 14:08:07,981 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2020-09-16 14:08:07,993 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-16 14:08:07,993 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-16 14:08:08,005 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-16 14:08:08,006 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-16 14:08:08,033 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,033 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,033 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,033 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,034 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,034 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,034 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,035 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,035 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,035 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,036 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,036 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,036 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,036 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,037 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,037 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,037 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,038 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,038 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,038 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,039 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,039 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,039 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,039 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,040 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,040 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,040 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,040 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,045 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,045 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,046 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,046 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,046 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,046 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,057 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,057 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,058 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,058 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,058 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,058 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,082 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-16 14:08:08,105 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-16 14:08:08,105 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-16 14:08:08,105 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-16 14:08:08,106 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-16 14:08:08,106 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-16 14:08:08,106 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-16 14:08:08,106 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-16 14:08:08,106 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-16 14:08:08,124 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-09-16 14:08:08,126 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-16 14:08:08,178 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-16 14:08:08,179 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-16 14:08:08,185 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-09-16 14:08:08,187 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-16 14:08:08,204 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-16 14:08:08,205 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-16 14:08:08,206 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-09-16 14:08:08,207 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-09-16 14:08:08,209 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-09-16 14:08:09,361 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-09-16 14:08:09,590 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-09-16 14:08:09,590 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-09-16 14:08:09,595 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-16 14:08:09,609 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-16 14:08:09,612 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-16 14:08:09,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-16 14:08:09,621 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:09,623 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-16 14:08:09,623 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:09,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:09,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-09-16 14:08:09,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:09,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170838324] [2020-09-16 14:08:09,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:09,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:09,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:09,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170838324] [2020-09-16 14:08:09,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 14:08:09,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-16 14:08:09,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975883452] [2020-09-16 14:08:09,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-16 14:08:09,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:09,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-16 14:08:09,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-16 14:08:09,960 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-16 14:08:10,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:10,044 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-09-16 14:08:10,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-16 14:08:10,047 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-16 14:08:10,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:10,063 INFO L225 Difference]: With dead ends: 75 [2020-09-16 14:08:10,064 INFO L226 Difference]: Without dead ends: 42 [2020-09-16 14:08:10,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-16 14:08:10,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-16 14:08:10,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-16 14:08:10,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-16 14:08:10,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-09-16 14:08:10,118 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-09-16 14:08:10,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:10,119 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-09-16 14:08:10,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-16 14:08:10,119 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-09-16 14:08:10,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-16 14:08:10,120 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:10,120 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:10,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-16 14:08:10,121 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:10,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:10,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-09-16 14:08:10,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:10,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708069999] [2020-09-16 14:08:10,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:10,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:10,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:10,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708069999] [2020-09-16 14:08:10,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 14:08:10,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-16 14:08:10,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561068270] [2020-09-16 14:08:10,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-16 14:08:10,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:10,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-16 14:08:10,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-16 14:08:10,236 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-09-16 14:08:10,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:10,271 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-09-16 14:08:10,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-16 14:08:10,271 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-16 14:08:10,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:10,273 INFO L225 Difference]: With dead ends: 56 [2020-09-16 14:08:10,273 INFO L226 Difference]: Without dead ends: 50 [2020-09-16 14:08:10,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-09-16 14:08:10,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-16 14:08:10,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-16 14:08:10,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-16 14:08:10,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-09-16 14:08:10,283 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-09-16 14:08:10,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:10,284 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-09-16 14:08:10,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-16 14:08:10,285 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-09-16 14:08:10,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-16 14:08:10,286 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:10,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:10,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-16 14:08:10,286 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:10,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:10,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-09-16 14:08:10,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:10,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434023972] [2020-09-16 14:08:10,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:10,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:10,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:10,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434023972] [2020-09-16 14:08:10,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 14:08:10,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-16 14:08:10,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86238599] [2020-09-16 14:08:10,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-16 14:08:10,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:10,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-16 14:08:10,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-16 14:08:10,444 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-09-16 14:08:10,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:10,529 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-09-16 14:08:10,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-16 14:08:10,529 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-16 14:08:10,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:10,531 INFO L225 Difference]: With dead ends: 78 [2020-09-16 14:08:10,531 INFO L226 Difference]: Without dead ends: 71 [2020-09-16 14:08:10,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-16 14:08:10,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-16 14:08:10,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-09-16 14:08:10,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-16 14:08:10,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-16 14:08:10,542 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-09-16 14:08:10,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:10,543 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-16 14:08:10,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-16 14:08:10,543 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-16 14:08:10,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-16 14:08:10,544 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:10,544 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:10,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-16 14:08:10,545 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:10,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:10,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-09-16 14:08:10,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:10,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500775432] [2020-09-16 14:08:10,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:10,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:10,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:10,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500775432] [2020-09-16 14:08:10,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 14:08:10,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-16 14:08:10,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482755354] [2020-09-16 14:08:10,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-16 14:08:10,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:10,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-16 14:08:10,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-16 14:08:10,661 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-09-16 14:08:10,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:10,766 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-16 14:08:10,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-16 14:08:10,767 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-16 14:08:10,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:10,768 INFO L225 Difference]: With dead ends: 54 [2020-09-16 14:08:10,769 INFO L226 Difference]: Without dead ends: 43 [2020-09-16 14:08:10,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-09-16 14:08:10,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-16 14:08:10,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-16 14:08:10,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-16 14:08:10,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-09-16 14:08:10,775 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-09-16 14:08:10,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:10,775 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-09-16 14:08:10,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-16 14:08:10,775 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-09-16 14:08:10,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-16 14:08:10,776 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:10,776 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:10,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-16 14:08:10,777 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:10,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:10,777 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-09-16 14:08:10,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:10,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198891464] [2020-09-16 14:08:10,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:10,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:10,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:10,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198891464] [2020-09-16 14:08:10,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 14:08:10,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-16 14:08:10,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820096633] [2020-09-16 14:08:10,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-16 14:08:10,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:10,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-16 14:08:10,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-16 14:08:10,903 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-09-16 14:08:10,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:10,999 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-09-16 14:08:11,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-16 14:08:11,000 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-16 14:08:11,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:11,002 INFO L225 Difference]: With dead ends: 57 [2020-09-16 14:08:11,002 INFO L226 Difference]: Without dead ends: 51 [2020-09-16 14:08:11,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-09-16 14:08:11,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-16 14:08:11,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-09-16 14:08:11,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-16 14:08:11,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-16 14:08:11,011 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-09-16 14:08:11,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:11,011 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-16 14:08:11,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-16 14:08:11,011 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-16 14:08:11,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 14:08:11,014 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:11,014 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:11,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-16 14:08:11,014 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:11,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:11,015 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-09-16 14:08:11,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:11,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685730997] [2020-09-16 14:08:11,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:11,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:11,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:11,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685730997] [2020-09-16 14:08:11,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869083611] [2020-09-16 14:08:11,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:11,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:08:11,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:11,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-16 14:08:11,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:11,297 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:08:11,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:11,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:11,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-16 14:08:11,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387295787] [2020-09-16 14:08:11,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-16 14:08:11,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:11,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-16 14:08:11,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-16 14:08:11,330 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-09-16 14:08:11,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:11,448 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-09-16 14:08:11,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-16 14:08:11,449 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-16 14:08:11,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:11,450 INFO L225 Difference]: With dead ends: 48 [2020-09-16 14:08:11,450 INFO L226 Difference]: Without dead ends: 43 [2020-09-16 14:08:11,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-09-16 14:08:11,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-16 14:08:11,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-16 14:08:11,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-16 14:08:11,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-09-16 14:08:11,458 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-09-16 14:08:11,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:11,458 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-09-16 14:08:11,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-16 14:08:11,458 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-09-16 14:08:11,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 14:08:11,461 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:11,461 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:11,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-16 14:08:11,673 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:11,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:11,674 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-09-16 14:08:11,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:11,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107556595] [2020-09-16 14:08:11,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:11,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:11,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:11,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107556595] [2020-09-16 14:08:11,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393127525] [2020-09-16 14:08:11,777 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:11,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:08:11,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:11,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-16 14:08:11,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:11,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:11,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:11,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-16 14:08:11,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562438941] [2020-09-16 14:08:11,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-16 14:08:11,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:11,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-16 14:08:11,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-16 14:08:11,864 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-09-16 14:08:11,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:11,940 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-16 14:08:11,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-16 14:08:11,940 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-16 14:08:11,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:11,941 INFO L225 Difference]: With dead ends: 54 [2020-09-16 14:08:11,941 INFO L226 Difference]: Without dead ends: 48 [2020-09-16 14:08:11,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-09-16 14:08:11,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-16 14:08:11,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-09-16 14:08:11,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-16 14:08:11,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-09-16 14:08:11,947 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-09-16 14:08:11,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:11,947 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-09-16 14:08:11,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-16 14:08:11,948 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-09-16 14:08:11,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 14:08:11,949 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:11,949 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:12,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:12,162 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:12,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:12,163 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-09-16 14:08:12,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:12,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802042778] [2020-09-16 14:08:12,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:12,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:12,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:12,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802042778] [2020-09-16 14:08:12,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418214379] [2020-09-16 14:08:12,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:12,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 14:08:12,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:12,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-16 14:08:12,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:12,304 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:12,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:12,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:12,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-16 14:08:12,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482528874] [2020-09-16 14:08:12,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-16 14:08:12,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:12,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-16 14:08:12,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-16 14:08:12,319 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-09-16 14:08:12,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:12,463 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-09-16 14:08:12,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-16 14:08:12,463 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-16 14:08:12,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:12,464 INFO L225 Difference]: With dead ends: 58 [2020-09-16 14:08:12,464 INFO L226 Difference]: Without dead ends: 52 [2020-09-16 14:08:12,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-09-16 14:08:12,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-16 14:08:12,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-09-16 14:08:12,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-16 14:08:12,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-16 14:08:12,470 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-09-16 14:08:12,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:12,470 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-16 14:08:12,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-16 14:08:12,471 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-16 14:08:12,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 14:08:12,471 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:12,472 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:12,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:12,673 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:12,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:12,674 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-09-16 14:08:12,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:12,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75041822] [2020-09-16 14:08:12,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:12,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:12,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75041822] [2020-09-16 14:08:12,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22929938] [2020-09-16 14:08:12,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:12,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:12,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-16 14:08:12,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:12,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:12,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:12,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-16 14:08:12,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53967717] [2020-09-16 14:08:12,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-16 14:08:12,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:12,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-16 14:08:12,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-16 14:08:12,852 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-09-16 14:08:12,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:12,999 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-16 14:08:12,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 14:08:13,000 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-16 14:08:13,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:13,001 INFO L225 Difference]: With dead ends: 78 [2020-09-16 14:08:13,001 INFO L226 Difference]: Without dead ends: 72 [2020-09-16 14:08:13,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-09-16 14:08:13,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-16 14:08:13,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-09-16 14:08:13,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-16 14:08:13,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-09-16 14:08:13,010 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-09-16 14:08:13,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:13,010 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-09-16 14:08:13,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-16 14:08:13,011 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-09-16 14:08:13,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 14:08:13,011 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:13,012 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:13,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:13,226 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:13,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:13,227 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-09-16 14:08:13,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:13,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512463329] [2020-09-16 14:08:13,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:13,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:13,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:13,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512463329] [2020-09-16 14:08:13,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955580581] [2020-09-16 14:08:13,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:13,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:08:13,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:13,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 14:08:13,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:13,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:13,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:13,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-16 14:08:13,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170400406] [2020-09-16 14:08:13,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-16 14:08:13,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:13,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-16 14:08:13,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-16 14:08:13,386 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-09-16 14:08:13,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:13,583 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-09-16 14:08:13,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 14:08:13,584 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-16 14:08:13,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:13,585 INFO L225 Difference]: With dead ends: 62 [2020-09-16 14:08:13,585 INFO L226 Difference]: Without dead ends: 54 [2020-09-16 14:08:13,586 INFO L675 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 [2020-09-16 14:08:13,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-16 14:08:13,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-09-16 14:08:13,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-16 14:08:13,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-09-16 14:08:13,597 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-09-16 14:08:13,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:13,597 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-09-16 14:08:13,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-16 14:08:13,598 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-09-16 14:08:13,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 14:08:13,600 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:13,601 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:13,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-16 14:08:13,813 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:13,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:13,813 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-09-16 14:08:13,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:13,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043106841] [2020-09-16 14:08:13,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:13,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:13,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:13,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043106841] [2020-09-16 14:08:13,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967037560] [2020-09-16 14:08:13,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:13,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-16 14:08:13,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:13,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 14:08:13,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:13,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:13,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:13,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-16 14:08:13,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072199056] [2020-09-16 14:08:13,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-16 14:08:13,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:13,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-16 14:08:13,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-16 14:08:13,996 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-09-16 14:08:14,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:14,121 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-09-16 14:08:14,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-16 14:08:14,122 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-16 14:08:14,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:14,124 INFO L225 Difference]: With dead ends: 64 [2020-09-16 14:08:14,124 INFO L226 Difference]: Without dead ends: 58 [2020-09-16 14:08:14,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-16 14:08:14,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-16 14:08:14,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-09-16 14:08:14,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-16 14:08:14,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-09-16 14:08:14,137 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-09-16 14:08:14,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:14,137 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-09-16 14:08:14,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-16 14:08:14,137 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-09-16 14:08:14,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 14:08:14,142 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:14,142 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:14,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:14,344 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:14,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:14,344 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-09-16 14:08:14,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:14,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645372251] [2020-09-16 14:08:14,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:14,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:14,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:14,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645372251] [2020-09-16 14:08:14,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750917195] [2020-09-16 14:08:14,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:14,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:08:14,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:14,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 14:08:14,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:14,501 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:14,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:14,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:14,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-16 14:08:14,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986431488] [2020-09-16 14:08:14,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-16 14:08:14,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:14,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-16 14:08:14,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-16 14:08:14,522 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-09-16 14:08:14,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:14,712 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-09-16 14:08:14,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 14:08:14,713 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-16 14:08:14,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:14,714 INFO L225 Difference]: With dead ends: 61 [2020-09-16 14:08:14,714 INFO L226 Difference]: Without dead ends: 55 [2020-09-16 14:08:14,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-09-16 14:08:14,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-16 14:08:14,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-09-16 14:08:14,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-16 14:08:14,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-16 14:08:14,719 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-09-16 14:08:14,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:14,720 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-16 14:08:14,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-16 14:08:14,720 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-16 14:08:14,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 14:08:14,721 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:14,721 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:14,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:14,932 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:14,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:14,932 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-09-16 14:08:14,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:14,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082715223] [2020-09-16 14:08:14,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:14,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:15,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:15,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082715223] [2020-09-16 14:08:15,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683751282] [2020-09-16 14:08:15,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:15,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:08:15,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:15,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 14:08:15,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:15,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:15,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:15,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-16 14:08:15,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370824342] [2020-09-16 14:08:15,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-16 14:08:15,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:15,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-16 14:08:15,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-16 14:08:15,091 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-09-16 14:08:15,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:15,278 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-16 14:08:15,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 14:08:15,279 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-16 14:08:15,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:15,281 INFO L225 Difference]: With dead ends: 77 [2020-09-16 14:08:15,281 INFO L226 Difference]: Without dead ends: 71 [2020-09-16 14:08:15,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-09-16 14:08:15,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-16 14:08:15,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-09-16 14:08:15,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-16 14:08:15,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-09-16 14:08:15,287 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-09-16 14:08:15,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:15,287 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-09-16 14:08:15,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-16 14:08:15,288 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-09-16 14:08:15,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 14:08:15,288 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:15,289 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:15,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-16 14:08:15,502 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:15,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:15,503 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-09-16 14:08:15,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:15,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814041582] [2020-09-16 14:08:15,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:15,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:15,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:15,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814041582] [2020-09-16 14:08:15,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756554301] [2020-09-16 14:08:15,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:15,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 14:08:15,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:15,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 14:08:15,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:15,684 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:15,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:15,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:15,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-16 14:08:15,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913101944] [2020-09-16 14:08:15,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-16 14:08:15,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:15,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-16 14:08:15,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-16 14:08:15,698 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-09-16 14:08:15,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:15,928 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-09-16 14:08:15,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 14:08:15,929 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-16 14:08:15,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:15,929 INFO L225 Difference]: With dead ends: 58 [2020-09-16 14:08:15,929 INFO L226 Difference]: Without dead ends: 50 [2020-09-16 14:08:15,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-09-16 14:08:15,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-16 14:08:15,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-09-16 14:08:15,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-16 14:08:15,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-09-16 14:08:15,933 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-09-16 14:08:15,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:15,934 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-09-16 14:08:15,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-16 14:08:15,934 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-09-16 14:08:15,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 14:08:15,934 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:15,935 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:16,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:16,141 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:16,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:16,142 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-09-16 14:08:16,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:16,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526450789] [2020-09-16 14:08:16,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:16,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:16,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:16,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526450789] [2020-09-16 14:08:16,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704002169] [2020-09-16 14:08:16,214 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:16,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:16,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 14:08:16,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:16,285 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:08:16,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:16,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:16,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-16 14:08:16,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706489460] [2020-09-16 14:08:16,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-16 14:08:16,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:16,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-16 14:08:16,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-16 14:08:16,301 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-09-16 14:08:16,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:16,502 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-09-16 14:08:16,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 14:08:16,502 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-16 14:08:16,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:16,503 INFO L225 Difference]: With dead ends: 60 [2020-09-16 14:08:16,503 INFO L226 Difference]: Without dead ends: 55 [2020-09-16 14:08:16,504 INFO L675 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 [2020-09-16 14:08:16,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-16 14:08:16,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-09-16 14:08:16,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-16 14:08:16,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-16 14:08:16,508 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-09-16 14:08:16,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:16,508 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-16 14:08:16,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-16 14:08:16,508 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-16 14:08:16,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 14:08:16,509 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:16,509 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:16,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-16 14:08:16,721 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:16,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:16,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-09-16 14:08:16,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:16,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027820808] [2020-09-16 14:08:16,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:16,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:16,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:16,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027820808] [2020-09-16 14:08:16,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254676983] [2020-09-16 14:08:16,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:16,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:08:16,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:16,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 14:08:16,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:16,883 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:08:16,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:16,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:16,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-16 14:08:16,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667133061] [2020-09-16 14:08:16,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-16 14:08:16,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:16,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-16 14:08:16,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-16 14:08:16,905 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-09-16 14:08:17,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:17,123 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-09-16 14:08:17,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 14:08:17,123 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-16 14:08:17,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:17,124 INFO L225 Difference]: With dead ends: 54 [2020-09-16 14:08:17,124 INFO L226 Difference]: Without dead ends: 49 [2020-09-16 14:08:17,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:08:17,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-16 14:08:17,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-09-16 14:08:17,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-16 14:08:17,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-09-16 14:08:17,128 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-09-16 14:08:17,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:17,131 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-09-16 14:08:17,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-16 14:08:17,131 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-09-16 14:08:17,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 14:08:17,132 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:17,132 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:17,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-16 14:08:17,333 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:17,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:17,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-09-16 14:08:17,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:17,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123272437] [2020-09-16 14:08:17,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:17,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:17,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:17,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123272437] [2020-09-16 14:08:17,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938047584] [2020-09-16 14:08:17,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:17,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 14:08:17,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:17,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 14:08:17,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:17,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:17,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:17,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-16 14:08:17,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935167410] [2020-09-16 14:08:17,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-16 14:08:17,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:17,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-16 14:08:17,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-09-16 14:08:17,523 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-09-16 14:08:17,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:17,648 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-09-16 14:08:17,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-16 14:08:17,649 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-16 14:08:17,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:17,649 INFO L225 Difference]: With dead ends: 60 [2020-09-16 14:08:17,650 INFO L226 Difference]: Without dead ends: 54 [2020-09-16 14:08:17,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-16 14:08:17,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-16 14:08:17,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-09-16 14:08:17,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-16 14:08:17,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-09-16 14:08:17,654 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-09-16 14:08:17,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:17,654 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-09-16 14:08:17,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-16 14:08:17,654 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-09-16 14:08:17,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 14:08:17,655 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:17,655 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:17,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-16 14:08:17,863 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:17,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:17,864 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-09-16 14:08:17,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:17,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319655675] [2020-09-16 14:08:17,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:17,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:17,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:17,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319655675] [2020-09-16 14:08:17,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161702772] [2020-09-16 14:08:17,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:18,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:08:18,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:18,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 14:08:18,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:18,025 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:18,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:18,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:18,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-16 14:08:18,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787650789] [2020-09-16 14:08:18,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-16 14:08:18,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:18,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-16 14:08:18,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-16 14:08:18,038 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-09-16 14:08:18,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:18,176 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-09-16 14:08:18,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 14:08:18,177 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-16 14:08:18,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:18,177 INFO L225 Difference]: With dead ends: 66 [2020-09-16 14:08:18,178 INFO L226 Difference]: Without dead ends: 60 [2020-09-16 14:08:18,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-09-16 14:08:18,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-16 14:08:18,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-09-16 14:08:18,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-16 14:08:18,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-16 14:08:18,181 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-09-16 14:08:18,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:18,181 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-16 14:08:18,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-16 14:08:18,181 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-16 14:08:18,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 14:08:18,182 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:18,182 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:18,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-16 14:08:18,391 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:18,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:18,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-09-16 14:08:18,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:18,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468867827] [2020-09-16 14:08:18,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:18,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:18,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:18,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468867827] [2020-09-16 14:08:18,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139369750] [2020-09-16 14:08:18,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:18,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 14:08:18,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:18,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 14:08:18,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:18,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:18,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:18,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-16 14:08:18,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351265639] [2020-09-16 14:08:18,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-16 14:08:18,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:18,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-16 14:08:18,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-16 14:08:18,542 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-09-16 14:08:18,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:18,748 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-09-16 14:08:18,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-16 14:08:18,749 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-16 14:08:18,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:18,749 INFO L225 Difference]: With dead ends: 67 [2020-09-16 14:08:18,750 INFO L226 Difference]: Without dead ends: 61 [2020-09-16 14:08:18,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:08:18,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-16 14:08:18,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-09-16 14:08:18,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-16 14:08:18,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-09-16 14:08:18,753 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-09-16 14:08:18,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:18,754 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-09-16 14:08:18,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-16 14:08:18,754 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-09-16 14:08:18,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 14:08:18,754 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:18,754 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:18,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:18,962 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:18,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:18,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-09-16 14:08:18,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:18,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136282251] [2020-09-16 14:08:18,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:18,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:19,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:19,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136282251] [2020-09-16 14:08:19,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995731612] [2020-09-16 14:08:19,046 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:19,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 14:08:19,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:19,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 14:08:19,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:19,130 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:19,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:19,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:19,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-16 14:08:19,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513972028] [2020-09-16 14:08:19,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-16 14:08:19,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:19,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-16 14:08:19,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-16 14:08:19,166 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-09-16 14:08:19,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:19,427 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-09-16 14:08:19,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 14:08:19,428 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-16 14:08:19,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:19,429 INFO L225 Difference]: With dead ends: 69 [2020-09-16 14:08:19,429 INFO L226 Difference]: Without dead ends: 63 [2020-09-16 14:08:19,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:08:19,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-16 14:08:19,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-09-16 14:08:19,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-16 14:08:19,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-16 14:08:19,432 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-09-16 14:08:19,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:19,432 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-16 14:08:19,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-16 14:08:19,433 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-16 14:08:19,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 14:08:19,436 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:19,436 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:19,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:19,643 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:19,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:19,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-09-16 14:08:19,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:19,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407506687] [2020-09-16 14:08:19,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:19,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:19,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:19,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407506687] [2020-09-16 14:08:19,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018177610] [2020-09-16 14:08:19,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:19,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:19,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 14:08:19,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:19,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:19,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:19,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-16 14:08:19,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092886832] [2020-09-16 14:08:19,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-16 14:08:19,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:19,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-16 14:08:19,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-16 14:08:19,781 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-09-16 14:08:19,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:19,992 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-16 14:08:19,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 14:08:19,994 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-16 14:08:19,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:19,995 INFO L225 Difference]: With dead ends: 88 [2020-09-16 14:08:19,995 INFO L226 Difference]: Without dead ends: 82 [2020-09-16 14:08:19,996 INFO L675 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 [2020-09-16 14:08:19,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-16 14:08:19,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-09-16 14:08:19,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-16 14:08:19,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-09-16 14:08:19,999 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-09-16 14:08:19,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:19,999 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-09-16 14:08:19,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-16 14:08:19,999 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-09-16 14:08:20,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 14:08:20,000 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:20,000 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:20,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:20,201 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:20,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:20,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-09-16 14:08:20,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:20,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359212281] [2020-09-16 14:08:20,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:20,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:20,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:20,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359212281] [2020-09-16 14:08:20,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754036643] [2020-09-16 14:08:20,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:20,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:08:20,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:20,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 14:08:20,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:20,376 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:20,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:20,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:20,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-16 14:08:20,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429234911] [2020-09-16 14:08:20,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-16 14:08:20,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:20,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-16 14:08:20,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-16 14:08:20,390 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-09-16 14:08:20,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:20,682 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-09-16 14:08:20,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 14:08:20,683 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-16 14:08:20,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:20,683 INFO L225 Difference]: With dead ends: 69 [2020-09-16 14:08:20,683 INFO L226 Difference]: Without dead ends: 61 [2020-09-16 14:08:20,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-09-16 14:08:20,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-16 14:08:20,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-09-16 14:08:20,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-16 14:08:20,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-09-16 14:08:20,686 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-09-16 14:08:20,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:20,687 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-09-16 14:08:20,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-16 14:08:20,687 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-09-16 14:08:20,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:08:20,687 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:20,688 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:20,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-09-16 14:08:20,895 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:20,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:20,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-09-16 14:08:20,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:20,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544534894] [2020-09-16 14:08:20,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:20,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:20,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:20,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544534894] [2020-09-16 14:08:20,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653054514] [2020-09-16 14:08:20,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:21,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 14:08:21,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:21,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 14:08:21,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:21,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:21,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:21,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-16 14:08:21,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527745522] [2020-09-16 14:08:21,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-16 14:08:21,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:21,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-16 14:08:21,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-16 14:08:21,067 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-09-16 14:08:21,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:21,248 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-09-16 14:08:21,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 14:08:21,248 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-16 14:08:21,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:21,249 INFO L225 Difference]: With dead ends: 74 [2020-09-16 14:08:21,249 INFO L226 Difference]: Without dead ends: 68 [2020-09-16 14:08:21,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:08:21,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-16 14:08:21,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-09-16 14:08:21,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-16 14:08:21,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-16 14:08:21,253 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-16 14:08:21,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:21,253 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-16 14:08:21,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-16 14:08:21,253 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-16 14:08:21,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:08:21,254 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:21,254 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:21,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-16 14:08:21,464 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:21,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:21,465 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-09-16 14:08:21,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:21,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297880072] [2020-09-16 14:08:21,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:21,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:21,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:21,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297880072] [2020-09-16 14:08:21,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458691525] [2020-09-16 14:08:21,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:21,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:08:21,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:21,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 14:08:21,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:21,661 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:21,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:21,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:21,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-16 14:08:21,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041011882] [2020-09-16 14:08:21,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 14:08:21,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:21,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 14:08:21,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-16 14:08:21,673 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-16 14:08:21,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:21,909 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-09-16 14:08:21,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 14:08:21,909 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-16 14:08:21,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:21,910 INFO L225 Difference]: With dead ends: 71 [2020-09-16 14:08:21,910 INFO L226 Difference]: Without dead ends: 65 [2020-09-16 14:08:21,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-09-16 14:08:21,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-16 14:08:21,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-09-16 14:08:21,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-16 14:08:21,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-16 14:08:21,914 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-16 14:08:21,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:21,915 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-16 14:08:21,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 14:08:21,915 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-16 14:08:21,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:08:21,915 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:21,916 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:22,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-16 14:08:22,123 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:22,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:22,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-09-16 14:08:22,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:22,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841023374] [2020-09-16 14:08:22,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:22,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:22,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:22,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841023374] [2020-09-16 14:08:22,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851391461] [2020-09-16 14:08:22,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:22,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 14:08:22,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:22,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 14:08:22,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:22,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:22,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:22,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-16 14:08:22,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024226675] [2020-09-16 14:08:22,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-16 14:08:22,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:22,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-16 14:08:22,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-16 14:08:22,299 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-16 14:08:22,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:22,527 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-09-16 14:08:22,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-16 14:08:22,528 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-16 14:08:22,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:22,529 INFO L225 Difference]: With dead ends: 68 [2020-09-16 14:08:22,530 INFO L226 Difference]: Without dead ends: 62 [2020-09-16 14:08:22,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:08:22,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-16 14:08:22,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-09-16 14:08:22,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-16 14:08:22,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-16 14:08:22,534 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-16 14:08:22,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:22,534 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-16 14:08:22,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-16 14:08:22,534 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-16 14:08:22,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:08:22,535 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:22,535 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:22,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-09-16 14:08:22,745 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:22,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:22,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-09-16 14:08:22,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:22,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682331230] [2020-09-16 14:08:22,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:22,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:22,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:22,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682331230] [2020-09-16 14:08:22,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340518142] [2020-09-16 14:08:22,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:22,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 14:08:22,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:22,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 14:08:22,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:22,912 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:22,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:22,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:22,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-16 14:08:22,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190939131] [2020-09-16 14:08:22,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 14:08:22,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:22,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 14:08:22,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-16 14:08:22,925 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-16 14:08:23,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:23,237 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-09-16 14:08:23,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 14:08:23,238 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-16 14:08:23,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:23,239 INFO L225 Difference]: With dead ends: 67 [2020-09-16 14:08:23,239 INFO L226 Difference]: Without dead ends: 61 [2020-09-16 14:08:23,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-09-16 14:08:23,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-16 14:08:23,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-09-16 14:08:23,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-16 14:08:23,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-16 14:08:23,241 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-16 14:08:23,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:23,242 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-16 14:08:23,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 14:08:23,242 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-16 14:08:23,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:08:23,242 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:23,242 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:23,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-16 14:08:23,443 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:23,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:23,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-09-16 14:08:23,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:23,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542019032] [2020-09-16 14:08:23,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:23,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:23,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:23,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542019032] [2020-09-16 14:08:23,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604940866] [2020-09-16 14:08:23,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:23,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:23,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 14:08:23,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:23,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:23,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:23,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-16 14:08:23,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165816988] [2020-09-16 14:08:23,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-16 14:08:23,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:23,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-16 14:08:23,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-16 14:08:23,625 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-16 14:08:23,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:23,912 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-16 14:08:23,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 14:08:23,913 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-16 14:08:23,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:23,914 INFO L225 Difference]: With dead ends: 83 [2020-09-16 14:08:23,914 INFO L226 Difference]: Without dead ends: 77 [2020-09-16 14:08:23,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-09-16 14:08:23,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-16 14:08:23,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-09-16 14:08:23,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-16 14:08:23,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-09-16 14:08:23,918 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-09-16 14:08:23,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:23,918 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-09-16 14:08:23,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-16 14:08:23,918 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-09-16 14:08:23,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:08:23,919 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:23,919 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:24,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:24,123 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:24,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:24,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-09-16 14:08:24,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:24,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065061968] [2020-09-16 14:08:24,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:24,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:24,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:24,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065061968] [2020-09-16 14:08:24,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880397825] [2020-09-16 14:08:24,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:24,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:08:24,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:24,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 14:08:24,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:24,300 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:24,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:24,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:24,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-16 14:08:24,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043504772] [2020-09-16 14:08:24,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 14:08:24,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:24,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 14:08:24,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-16 14:08:24,317 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-09-16 14:08:24,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:24,684 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-09-16 14:08:24,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 14:08:24,684 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-16 14:08:24,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:24,685 INFO L225 Difference]: With dead ends: 64 [2020-09-16 14:08:24,685 INFO L226 Difference]: Without dead ends: 56 [2020-09-16 14:08:24,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-09-16 14:08:24,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-16 14:08:24,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2020-09-16 14:08:24,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-16 14:08:24,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-09-16 14:08:24,688 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-09-16 14:08:24,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:24,688 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-09-16 14:08:24,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 14:08:24,688 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-09-16 14:08:24,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:08:24,689 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:24,689 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:24,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-16 14:08:24,898 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:24,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:24,898 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-09-16 14:08:24,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:24,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959515393] [2020-09-16 14:08:24,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:24,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:24,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:24,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959515393] [2020-09-16 14:08:24,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274925776] [2020-09-16 14:08:24,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:25,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 14:08:25,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:25,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 14:08:25,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:25,060 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:08:25,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:25,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:25,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-16 14:08:25,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365289818] [2020-09-16 14:08:25,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 14:08:25,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:25,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 14:08:25,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-16 14:08:25,082 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-09-16 14:08:25,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:25,371 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-09-16 14:08:25,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 14:08:25,372 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-16 14:08:25,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:25,373 INFO L225 Difference]: With dead ends: 68 [2020-09-16 14:08:25,373 INFO L226 Difference]: Without dead ends: 63 [2020-09-16 14:08:25,374 INFO L675 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 [2020-09-16 14:08:25,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-16 14:08:25,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-09-16 14:08:25,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-16 14:08:25,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-16 14:08:25,377 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-09-16 14:08:25,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:25,377 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-16 14:08:25,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 14:08:25,377 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-16 14:08:25,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:08:25,378 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:25,378 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:25,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-16 14:08:25,580 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:25,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:25,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-09-16 14:08:25,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:25,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252803233] [2020-09-16 14:08:25,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:25,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:25,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:25,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252803233] [2020-09-16 14:08:25,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527608484] [2020-09-16 14:08:25,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:25,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:08:25,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:25,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:08:25,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:25,759 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:08:25,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:25,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:25,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-16 14:08:25,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50523889] [2020-09-16 14:08:25,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-16 14:08:25,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:25,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-16 14:08:25,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-16 14:08:25,774 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-09-16 14:08:26,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:26,160 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-09-16 14:08:26,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 14:08:26,160 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-16 14:08:26,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:26,161 INFO L225 Difference]: With dead ends: 60 [2020-09-16 14:08:26,161 INFO L226 Difference]: Without dead ends: 55 [2020-09-16 14:08:26,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-09-16 14:08:26,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-16 14:08:26,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-09-16 14:08:26,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-16 14:08:26,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-09-16 14:08:26,165 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-09-16 14:08:26,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:26,166 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-09-16 14:08:26,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-16 14:08:26,166 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-09-16 14:08:26,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:08:26,166 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:26,166 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:26,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:26,375 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:26,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:26,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-09-16 14:08:26,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:26,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296684405] [2020-09-16 14:08:26,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:26,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:26,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:26,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296684405] [2020-09-16 14:08:26,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89582211] [2020-09-16 14:08:26,478 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:26,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-16 14:08:26,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:26,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:08:26,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:26,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:26,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:26,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-16 14:08:26,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897231692] [2020-09-16 14:08:26,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 14:08:26,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:26,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 14:08:26,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-16 14:08:26,558 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-09-16 14:08:26,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:26,699 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-09-16 14:08:26,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 14:08:26,700 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-16 14:08:26,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:26,701 INFO L225 Difference]: With dead ends: 66 [2020-09-16 14:08:26,701 INFO L226 Difference]: Without dead ends: 60 [2020-09-16 14:08:26,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-09-16 14:08:26,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-16 14:08:26,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-09-16 14:08:26,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-16 14:08:26,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-09-16 14:08:26,704 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-09-16 14:08:26,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:26,704 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-09-16 14:08:26,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 14:08:26,704 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-09-16 14:08:26,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:08:26,705 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:26,705 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:26,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:26,913 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:26,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:26,914 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-09-16 14:08:26,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:26,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680589942] [2020-09-16 14:08:26,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:26,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:27,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:27,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680589942] [2020-09-16 14:08:27,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809960790] [2020-09-16 14:08:27,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:27,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-16 14:08:27,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:27,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:08:27,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:27,108 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:27,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:27,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:27,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-16 14:08:27,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024380595] [2020-09-16 14:08:27,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-16 14:08:27,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:27,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-16 14:08:27,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-16 14:08:27,137 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-09-16 14:08:27,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:27,394 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-09-16 14:08:27,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 14:08:27,394 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-16 14:08:27,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:27,395 INFO L225 Difference]: With dead ends: 74 [2020-09-16 14:08:27,396 INFO L226 Difference]: Without dead ends: 68 [2020-09-16 14:08:27,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-09-16 14:08:27,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-16 14:08:27,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-09-16 14:08:27,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-16 14:08:27,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-09-16 14:08:27,400 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-09-16 14:08:27,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:27,401 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-09-16 14:08:27,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-16 14:08:27,401 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-09-16 14:08:27,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:08:27,402 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:27,402 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:27,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-16 14:08:27,613 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:27,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:27,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-09-16 14:08:27,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:27,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530709831] [2020-09-16 14:08:27,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:27,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:27,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:27,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530709831] [2020-09-16 14:08:27,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725775131] [2020-09-16 14:08:27,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:27,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:27,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:08:27,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:27,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:27,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:27,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-16 14:08:27,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402989077] [2020-09-16 14:08:27,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 14:08:27,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:27,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 14:08:27,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-16 14:08:27,798 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-09-16 14:08:28,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:28,034 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-09-16 14:08:28,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 14:08:28,035 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-16 14:08:28,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:28,036 INFO L225 Difference]: With dead ends: 75 [2020-09-16 14:08:28,036 INFO L226 Difference]: Without dead ends: 69 [2020-09-16 14:08:28,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-09-16 14:08:28,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-16 14:08:28,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-09-16 14:08:28,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-16 14:08:28,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-16 14:08:28,040 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-09-16 14:08:28,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:28,040 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-16 14:08:28,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 14:08:28,041 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-16 14:08:28,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:08:28,041 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:28,041 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:28,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:28,250 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:28,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:28,251 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-09-16 14:08:28,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:28,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089089617] [2020-09-16 14:08:28,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:28,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:28,376 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:28,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089089617] [2020-09-16 14:08:28,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640360276] [2020-09-16 14:08:28,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:28,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:08:28,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:28,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:08:28,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:28,514 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:28,532 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:28,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:28,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-16 14:08:28,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457931601] [2020-09-16 14:08:28,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-16 14:08:28,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:28,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-16 14:08:28,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-16 14:08:28,539 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-09-16 14:08:28,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:28,870 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-09-16 14:08:28,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 14:08:28,871 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-16 14:08:28,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:28,872 INFO L225 Difference]: With dead ends: 79 [2020-09-16 14:08:28,872 INFO L226 Difference]: Without dead ends: 73 [2020-09-16 14:08:28,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-09-16 14:08:28,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-16 14:08:28,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-09-16 14:08:28,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-16 14:08:28,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-16 14:08:28,877 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-09-16 14:08:28,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:28,877 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-16 14:08:28,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-16 14:08:28,877 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-16 14:08:28,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:08:28,878 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:28,878 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:29,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-16 14:08:29,091 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:29,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:29,092 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-09-16 14:08:29,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:29,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738834747] [2020-09-16 14:08:29,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:29,221 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:29,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738834747] [2020-09-16 14:08:29,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305500869] [2020-09-16 14:08:29,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:29,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-16 14:08:29,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:29,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:08:29,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:29,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:29,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:29,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-16 14:08:29,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125427133] [2020-09-16 14:08:29,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 14:08:29,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:29,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 14:08:29,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-16 14:08:29,325 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-09-16 14:08:29,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:29,630 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-09-16 14:08:29,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 14:08:29,631 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-16 14:08:29,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:29,631 INFO L225 Difference]: With dead ends: 79 [2020-09-16 14:08:29,631 INFO L226 Difference]: Without dead ends: 73 [2020-09-16 14:08:29,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-09-16 14:08:29,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-16 14:08:29,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-09-16 14:08:29,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-16 14:08:29,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-09-16 14:08:29,634 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-09-16 14:08:29,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:29,635 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-09-16 14:08:29,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 14:08:29,635 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-09-16 14:08:29,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:08:29,635 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:29,636 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:29,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:29,845 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:29,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:29,846 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-09-16 14:08:29,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:29,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393356978] [2020-09-16 14:08:29,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:29,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:29,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393356978] [2020-09-16 14:08:29,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46192311] [2020-09-16 14:08:29,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:29,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:08:29,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:29,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:08:29,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:30,017 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:30,029 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:30,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:30,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-16 14:08:30,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868364036] [2020-09-16 14:08:30,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-16 14:08:30,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:30,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-16 14:08:30,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-16 14:08:30,030 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-09-16 14:08:30,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:30,406 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-09-16 14:08:30,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 14:08:30,407 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-16 14:08:30,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:30,408 INFO L225 Difference]: With dead ends: 76 [2020-09-16 14:08:30,408 INFO L226 Difference]: Without dead ends: 70 [2020-09-16 14:08:30,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-09-16 14:08:30,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-16 14:08:30,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-09-16 14:08:30,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-16 14:08:30,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-16 14:08:30,411 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-09-16 14:08:30,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:30,411 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-16 14:08:30,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-16 14:08:30,412 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-16 14:08:30,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:08:30,412 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:30,412 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:30,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-16 14:08:30,622 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:30,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:30,622 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-09-16 14:08:30,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:30,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862804637] [2020-09-16 14:08:30,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:30,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:30,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862804637] [2020-09-16 14:08:30,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499178493] [2020-09-16 14:08:30,712 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:30,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-16 14:08:30,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:30,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:08:30,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:30,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:30,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:30,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-16 14:08:30,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458207354] [2020-09-16 14:08:30,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 14:08:30,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:30,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 14:08:30,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-16 14:08:30,787 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-09-16 14:08:31,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:31,120 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-09-16 14:08:31,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 14:08:31,121 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-16 14:08:31,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:31,122 INFO L225 Difference]: With dead ends: 96 [2020-09-16 14:08:31,122 INFO L226 Difference]: Without dead ends: 90 [2020-09-16 14:08:31,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-09-16 14:08:31,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-16 14:08:31,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-09-16 14:08:31,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-16 14:08:31,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-09-16 14:08:31,126 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-09-16 14:08:31,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:31,126 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-09-16 14:08:31,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 14:08:31,126 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-09-16 14:08:31,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:08:31,127 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:31,127 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:31,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-16 14:08:31,337 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:31,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:31,337 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-09-16 14:08:31,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:31,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221368726] [2020-09-16 14:08:31,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:31,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:31,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:31,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221368726] [2020-09-16 14:08:31,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357493956] [2020-09-16 14:08:31,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:31,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-16 14:08:31,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:31,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:08:31,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:31,511 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:31,523 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:31,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:31,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-16 14:08:31,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418959500] [2020-09-16 14:08:31,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-16 14:08:31,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:31,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-16 14:08:31,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-16 14:08:31,525 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-09-16 14:08:31,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:31,984 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-09-16 14:08:31,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 14:08:31,985 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-16 14:08:31,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:31,987 INFO L225 Difference]: With dead ends: 77 [2020-09-16 14:08:31,987 INFO L226 Difference]: Without dead ends: 69 [2020-09-16 14:08:31,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-09-16 14:08:31,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-16 14:08:31,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-09-16 14:08:31,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-16 14:08:31,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-09-16 14:08:31,991 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-09-16 14:08:31,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:31,992 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-09-16 14:08:31,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-16 14:08:31,992 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-09-16 14:08:31,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-16 14:08:31,993 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:31,993 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:32,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-09-16 14:08:32,194 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:32,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:32,195 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-09-16 14:08:32,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:32,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046441580] [2020-09-16 14:08:32,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:32,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:32,344 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:32,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046441580] [2020-09-16 14:08:32,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43418358] [2020-09-16 14:08:32,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:32,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:32,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:08:32,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:32,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:32,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:32,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-16 14:08:32,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965330356] [2020-09-16 14:08:32,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-16 14:08:32,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:32,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-16 14:08:32,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-16 14:08:32,437 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-09-16 14:08:32,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:32,655 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-16 14:08:32,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-16 14:08:32,656 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-16 14:08:32,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:32,657 INFO L225 Difference]: With dead ends: 84 [2020-09-16 14:08:32,657 INFO L226 Difference]: Without dead ends: 78 [2020-09-16 14:08:32,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-16 14:08:32,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-16 14:08:32,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-09-16 14:08:32,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-16 14:08:32,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-16 14:08:32,660 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-16 14:08:32,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:32,661 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-16 14:08:32,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-16 14:08:32,661 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-16 14:08:32,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-16 14:08:32,662 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:32,662 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:32,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-16 14:08:32,863 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:32,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:32,863 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-09-16 14:08:32,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:32,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574431139] [2020-09-16 14:08:32,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:32,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:33,028 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:33,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574431139] [2020-09-16 14:08:33,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753344653] [2020-09-16 14:08:33,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:33,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:08:33,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:33,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:08:33,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:33,119 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:33,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:33,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:33,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-16 14:08:33,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241690260] [2020-09-16 14:08:33,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 14:08:33,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:33,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 14:08:33,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-16 14:08:33,138 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-16 14:08:33,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:33,484 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-09-16 14:08:33,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 14:08:33,485 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-16 14:08:33,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:33,486 INFO L225 Difference]: With dead ends: 81 [2020-09-16 14:08:33,486 INFO L226 Difference]: Without dead ends: 75 [2020-09-16 14:08:33,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-09-16 14:08:33,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-16 14:08:33,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-09-16 14:08:33,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-16 14:08:33,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-16 14:08:33,490 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-16 14:08:33,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:33,490 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-16 14:08:33,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 14:08:33,490 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-16 14:08:33,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-16 14:08:33,491 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:33,491 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:33,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-16 14:08:33,700 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:33,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:33,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-09-16 14:08:33,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:33,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951737604] [2020-09-16 14:08:33,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:33,813 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:33,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951737604] [2020-09-16 14:08:33,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482762402] [2020-09-16 14:08:33,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:33,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-16 14:08:33,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:33,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:08:33,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:33,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:33,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:33,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-16 14:08:33,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168764001] [2020-09-16 14:08:33,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-16 14:08:33,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:33,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-16 14:08:33,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-16 14:08:33,890 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-16 14:08:34,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:34,135 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-16 14:08:34,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 14:08:34,136 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-16 14:08:34,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:34,137 INFO L225 Difference]: With dead ends: 78 [2020-09-16 14:08:34,137 INFO L226 Difference]: Without dead ends: 72 [2020-09-16 14:08:34,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-09-16 14:08:34,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-16 14:08:34,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-09-16 14:08:34,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-16 14:08:34,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-16 14:08:34,142 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-16 14:08:34,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:34,142 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-16 14:08:34,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-16 14:08:34,143 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-16 14:08:34,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-16 14:08:34,143 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:34,144 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:34,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-09-16 14:08:34,355 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:34,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:34,356 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-09-16 14:08:34,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:34,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113106206] [2020-09-16 14:08:34,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:34,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:34,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:34,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113106206] [2020-09-16 14:08:34,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506458501] [2020-09-16 14:08:34,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:34,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:08:34,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:34,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:08:34,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:34,601 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:34,618 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:34,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:34,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-16 14:08:34,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332054993] [2020-09-16 14:08:34,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 14:08:34,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:34,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 14:08:34,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-16 14:08:34,621 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-16 14:08:35,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:35,050 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-16 14:08:35,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 14:08:35,051 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-16 14:08:35,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:35,052 INFO L225 Difference]: With dead ends: 77 [2020-09-16 14:08:35,052 INFO L226 Difference]: Without dead ends: 71 [2020-09-16 14:08:35,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-09-16 14:08:35,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-16 14:08:35,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-09-16 14:08:35,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-16 14:08:35,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-16 14:08:35,056 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-16 14:08:35,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:35,057 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-16 14:08:35,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 14:08:35,057 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-16 14:08:35,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-16 14:08:35,057 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:35,057 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:35,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-09-16 14:08:35,258 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:35,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:35,259 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-09-16 14:08:35,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:35,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66508976] [2020-09-16 14:08:35,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:35,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:35,362 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:35,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66508976] [2020-09-16 14:08:35,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283534238] [2020-09-16 14:08:35,363 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:35,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-16 14:08:35,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:35,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:08:35,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:35,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:35,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:35,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-16 14:08:35,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35990282] [2020-09-16 14:08:35,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-16 14:08:35,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:35,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-16 14:08:35,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-16 14:08:35,449 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-16 14:08:35,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:35,755 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-09-16 14:08:35,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 14:08:35,755 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-16 14:08:35,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:35,756 INFO L225 Difference]: With dead ends: 74 [2020-09-16 14:08:35,756 INFO L226 Difference]: Without dead ends: 68 [2020-09-16 14:08:35,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-09-16 14:08:35,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-16 14:08:35,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-09-16 14:08:35,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-16 14:08:35,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-16 14:08:35,764 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-16 14:08:35,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:35,764 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-16 14:08:35,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-16 14:08:35,765 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-16 14:08:35,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-16 14:08:35,765 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:35,765 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:35,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:35,974 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:35,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:35,975 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-09-16 14:08:35,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:35,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481467416] [2020-09-16 14:08:35,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:35,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:36,091 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:36,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481467416] [2020-09-16 14:08:36,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303755479] [2020-09-16 14:08:36,092 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:36,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-16 14:08:36,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:36,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:08:36,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:36,174 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:36,188 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:36,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:36,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-16 14:08:36,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165455958] [2020-09-16 14:08:36,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 14:08:36,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:36,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 14:08:36,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-16 14:08:36,189 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-16 14:08:36,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:36,628 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-09-16 14:08:36,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 14:08:36,629 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-16 14:08:36,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:36,630 INFO L225 Difference]: With dead ends: 73 [2020-09-16 14:08:36,630 INFO L226 Difference]: Without dead ends: 67 [2020-09-16 14:08:36,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-09-16 14:08:36,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-16 14:08:36,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-09-16 14:08:36,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-16 14:08:36,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-16 14:08:36,634 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-16 14:08:36,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:36,634 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-16 14:08:36,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 14:08:36,635 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-16 14:08:36,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-16 14:08:36,635 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:36,635 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:36,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-16 14:08:36,836 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:36,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:36,836 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-09-16 14:08:36,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:36,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998893709] [2020-09-16 14:08:36,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:36,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:36,936 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:36,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998893709] [2020-09-16 14:08:36,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849908081] [2020-09-16 14:08:36,937 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:36,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:36,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:08:36,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:37,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:37,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:37,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-16 14:08:37,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493676326] [2020-09-16 14:08:37,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-16 14:08:37,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:37,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-16 14:08:37,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-16 14:08:37,005 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-16 14:08:37,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:37,366 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-16 14:08:37,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 14:08:37,371 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-16 14:08:37,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:37,372 INFO L225 Difference]: With dead ends: 89 [2020-09-16 14:08:37,372 INFO L226 Difference]: Without dead ends: 83 [2020-09-16 14:08:37,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-09-16 14:08:37,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-16 14:08:37,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-09-16 14:08:37,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-16 14:08:37,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-09-16 14:08:37,375 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-09-16 14:08:37,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:37,376 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-09-16 14:08:37,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-16 14:08:37,376 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-09-16 14:08:37,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-16 14:08:37,376 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:37,376 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:37,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:37,584 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:37,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:37,585 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-09-16 14:08:37,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:37,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918428960] [2020-09-16 14:08:37,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:37,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:37,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:37,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918428960] [2020-09-16 14:08:37,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464645708] [2020-09-16 14:08:37,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:37,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:08:37,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:37,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-16 14:08:37,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:37,770 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:37,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:37,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-16 14:08:37,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129547491] [2020-09-16 14:08:37,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 14:08:37,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:37,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 14:08:37,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-16 14:08:37,772 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-09-16 14:08:38,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:38,202 INFO L93 Difference]: Finished difference Result 68 states and 165 transitions. [2020-09-16 14:08:38,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 14:08:38,202 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-16 14:08:38,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:38,203 INFO L225 Difference]: With dead ends: 68 [2020-09-16 14:08:38,203 INFO L226 Difference]: Without dead ends: 60 [2020-09-16 14:08:38,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-09-16 14:08:38,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-16 14:08:38,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2020-09-16 14:08:38,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-16 14:08:38,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-09-16 14:08:38,209 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-09-16 14:08:38,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:38,210 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-09-16 14:08:38,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 14:08:38,212 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-09-16 14:08:38,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-16 14:08:38,212 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:38,212 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:38,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-09-16 14:08:38,421 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:38,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:38,421 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-09-16 14:08:38,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:38,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557412333] [2020-09-16 14:08:38,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:38,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:38,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:38,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557412333] [2020-09-16 14:08:38,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976823597] [2020-09-16 14:08:38,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:38,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-16 14:08:38,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:38,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:08:38,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:38,622 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:08:38,637 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:38,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:38,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-16 14:08:38,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010773189] [2020-09-16 14:08:38,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 14:08:38,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:38,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 14:08:38,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-16 14:08:38,639 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-09-16 14:08:39,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:39,108 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-09-16 14:08:39,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 14:08:39,108 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-16 14:08:39,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:39,109 INFO L225 Difference]: With dead ends: 76 [2020-09-16 14:08:39,110 INFO L226 Difference]: Without dead ends: 71 [2020-09-16 14:08:39,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-09-16 14:08:39,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-16 14:08:39,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-09-16 14:08:39,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-16 14:08:39,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-16 14:08:39,113 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-09-16 14:08:39,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:39,113 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-16 14:08:39,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 14:08:39,114 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-16 14:08:39,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-16 14:08:39,114 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:39,114 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:39,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:39,323 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:39,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:39,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-09-16 14:08:39,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:39,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94692812] [2020-09-16 14:08:39,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:39,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:39,430 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:39,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94692812] [2020-09-16 14:08:39,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984732312] [2020-09-16 14:08:39,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:39,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:08:39,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:39,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-16 14:08:39,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:39,499 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:08:39,509 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:39,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:39,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-16 14:08:39,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287697707] [2020-09-16 14:08:39,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-16 14:08:39,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:39,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-16 14:08:39,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-16 14:08:39,511 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-09-16 14:08:39,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:39,982 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-09-16 14:08:39,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 14:08:39,983 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-16 14:08:39,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:39,984 INFO L225 Difference]: With dead ends: 66 [2020-09-16 14:08:39,984 INFO L226 Difference]: Without dead ends: 61 [2020-09-16 14:08:39,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-09-16 14:08:39,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-16 14:08:39,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-09-16 14:08:39,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-16 14:08:39,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-16 14:08:39,987 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-09-16 14:08:39,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:39,988 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-16 14:08:39,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-16 14:08:39,988 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-16 14:08:39,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-16 14:08:39,988 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:39,989 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:40,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-09-16 14:08:40,192 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:40,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:40,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-09-16 14:08:40,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:40,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126238812] [2020-09-16 14:08:40,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:40,348 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:40,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126238812] [2020-09-16 14:08:40,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366532480] [2020-09-16 14:08:40,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:40,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-16 14:08:40,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:40,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-16 14:08:40,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:40,436 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:40,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:40,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-16 14:08:40,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379017954] [2020-09-16 14:08:40,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 14:08:40,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:40,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 14:08:40,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-16 14:08:40,440 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-09-16 14:08:40,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:40,673 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-09-16 14:08:40,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-16 14:08:40,674 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-16 14:08:40,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:40,675 INFO L225 Difference]: With dead ends: 72 [2020-09-16 14:08:40,675 INFO L226 Difference]: Without dead ends: 66 [2020-09-16 14:08:40,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-09-16 14:08:40,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-16 14:08:40,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-09-16 14:08:40,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-16 14:08:40,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-09-16 14:08:40,682 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-09-16 14:08:40,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:40,682 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-09-16 14:08:40,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 14:08:40,683 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-09-16 14:08:40,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-16 14:08:40,683 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:40,684 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:40,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-16 14:08:40,896 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:40,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:40,896 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-09-16 14:08:40,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:40,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736509622] [2020-09-16 14:08:40,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:40,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:41,029 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:41,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736509622] [2020-09-16 14:08:41,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140497908] [2020-09-16 14:08:41,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:41,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-16 14:08:41,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:41,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-16 14:08:41,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:41,135 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:41,147 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:41,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:41,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-16 14:08:41,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068284524] [2020-09-16 14:08:41,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-16 14:08:41,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:41,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-16 14:08:41,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-16 14:08:41,149 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-09-16 14:08:41,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:41,405 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-09-16 14:08:41,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 14:08:41,405 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-16 14:08:41,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:41,406 INFO L225 Difference]: With dead ends: 82 [2020-09-16 14:08:41,406 INFO L226 Difference]: Without dead ends: 76 [2020-09-16 14:08:41,407 INFO L675 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 [2020-09-16 14:08:41,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-16 14:08:41,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-09-16 14:08:41,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-16 14:08:41,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-09-16 14:08:41,409 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-09-16 14:08:41,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:41,409 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-09-16 14:08:41,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-16 14:08:41,410 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-09-16 14:08:41,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-16 14:08:41,413 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:41,413 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:41,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-09-16 14:08:41,614 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:41,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:41,615 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-09-16 14:08:41,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:41,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861727684] [2020-09-16 14:08:41,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:41,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:41,761 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:41,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861727684] [2020-09-16 14:08:41,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002749385] [2020-09-16 14:08:41,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:41,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:41,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-16 14:08:41,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:41,848 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:41,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:41,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-16 14:08:41,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143485148] [2020-09-16 14:08:41,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 14:08:41,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:41,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 14:08:41,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-09-16 14:08:41,850 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-09-16 14:08:42,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:42,127 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-09-16 14:08:42,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 14:08:42,128 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-16 14:08:42,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:42,129 INFO L225 Difference]: With dead ends: 83 [2020-09-16 14:08:42,129 INFO L226 Difference]: Without dead ends: 77 [2020-09-16 14:08:42,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-09-16 14:08:42,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-16 14:08:42,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-09-16 14:08:42,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-16 14:08:42,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-09-16 14:08:42,133 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-09-16 14:08:42,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:42,133 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-09-16 14:08:42,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 14:08:42,134 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-09-16 14:08:42,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-16 14:08:42,134 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:42,134 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:42,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-09-16 14:08:42,340 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:42,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:42,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-09-16 14:08:42,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:42,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488561037] [2020-09-16 14:08:42,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:42,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:42,475 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:42,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488561037] [2020-09-16 14:08:42,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635847692] [2020-09-16 14:08:42,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:42,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:08:42,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:42,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-16 14:08:42,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:42,561 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:42,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:42,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:42,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-16 14:08:42,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573245253] [2020-09-16 14:08:42,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-16 14:08:42,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:42,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-16 14:08:42,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-16 14:08:42,576 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-09-16 14:08:42,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:42,953 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-09-16 14:08:42,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 14:08:42,955 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-16 14:08:42,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:42,957 INFO L225 Difference]: With dead ends: 89 [2020-09-16 14:08:42,957 INFO L226 Difference]: Without dead ends: 83 [2020-09-16 14:08:42,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-09-16 14:08:42,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-16 14:08:42,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-09-16 14:08:42,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-16 14:08:42,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-09-16 14:08:42,960 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-09-16 14:08:42,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:42,960 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-09-16 14:08:42,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-16 14:08:42,961 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-09-16 14:08:42,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-16 14:08:42,961 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:42,961 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:43,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:43,162 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:43,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:43,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-09-16 14:08:43,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:43,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487170419] [2020-09-16 14:08:43,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:43,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:43,281 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:43,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487170419] [2020-09-16 14:08:43,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146845502] [2020-09-16 14:08:43,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:43,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-16 14:08:43,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:43,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-16 14:08:43,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:43,360 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:43,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:43,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-16 14:08:43,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765387276] [2020-09-16 14:08:43,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 14:08:43,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:43,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 14:08:43,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-09-16 14:08:43,361 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-09-16 14:08:43,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:43,740 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-09-16 14:08:43,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 14:08:43,740 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-16 14:08:43,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:43,741 INFO L225 Difference]: With dead ends: 89 [2020-09-16 14:08:43,741 INFO L226 Difference]: Without dead ends: 83 [2020-09-16 14:08:43,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-16 14:08:43,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-16 14:08:43,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-09-16 14:08:43,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-16 14:08:43,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-16 14:08:43,745 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-09-16 14:08:43,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:43,745 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-16 14:08:43,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 14:08:43,746 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-16 14:08:43,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-16 14:08:43,746 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:43,746 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:43,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:43,947 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:43,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:43,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-09-16 14:08:43,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:43,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599847666] [2020-09-16 14:08:43,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:43,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:44,087 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:44,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599847666] [2020-09-16 14:08:44,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585505998] [2020-09-16 14:08:44,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:44,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:08:44,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:44,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-16 14:08:44,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:44,158 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:44,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:44,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-16 14:08:44,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151274317] [2020-09-16 14:08:44,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-16 14:08:44,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:44,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-16 14:08:44,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-09-16 14:08:44,171 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-09-16 14:08:44,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:44,638 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-09-16 14:08:44,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 14:08:44,639 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-16 14:08:44,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:44,640 INFO L225 Difference]: With dead ends: 86 [2020-09-16 14:08:44,640 INFO L226 Difference]: Without dead ends: 80 [2020-09-16 14:08:44,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-09-16 14:08:44,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-16 14:08:44,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-09-16 14:08:44,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-16 14:08:44,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-16 14:08:44,644 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-09-16 14:08:44,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:44,644 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-16 14:08:44,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-16 14:08:44,644 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-16 14:08:44,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-16 14:08:44,645 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:44,645 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:44,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-09-16 14:08:44,846 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:44,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:44,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-09-16 14:08:44,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:44,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904024045] [2020-09-16 14:08:44,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:44,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:44,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:44,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904024045] [2020-09-16 14:08:44,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894069899] [2020-09-16 14:08:44,974 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:45,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-16 14:08:45,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:45,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-16 14:08:45,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:45,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:45,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:45,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-16 14:08:45,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959648293] [2020-09-16 14:08:45,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 14:08:45,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:45,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 14:08:45,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-16 14:08:45,046 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-09-16 14:08:45,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:45,454 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-09-16 14:08:45,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-16 14:08:45,455 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-16 14:08:45,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:45,456 INFO L225 Difference]: With dead ends: 87 [2020-09-16 14:08:45,456 INFO L226 Difference]: Without dead ends: 81 [2020-09-16 14:08:45,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-09-16 14:08:45,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-16 14:08:45,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-09-16 14:08:45,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-16 14:08:45,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-09-16 14:08:45,459 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-09-16 14:08:45,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:45,460 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-09-16 14:08:45,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 14:08:45,460 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-09-16 14:08:45,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-16 14:08:45,460 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:45,461 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:45,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:45,671 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:45,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:45,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-09-16 14:08:45,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:45,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464780335] [2020-09-16 14:08:45,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:45,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:45,782 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:45,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464780335] [2020-09-16 14:08:45,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580755007] [2020-09-16 14:08:45,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:45,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-16 14:08:45,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:45,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-16 14:08:45,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:45,875 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:45,908 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:45,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:45,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-16 14:08:45,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952897159] [2020-09-16 14:08:45,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-16 14:08:45,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:45,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-16 14:08:45,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-16 14:08:45,911 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-09-16 14:08:46,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:46,379 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-09-16 14:08:46,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-16 14:08:46,380 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-16 14:08:46,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:46,381 INFO L225 Difference]: With dead ends: 84 [2020-09-16 14:08:46,381 INFO L226 Difference]: Without dead ends: 78 [2020-09-16 14:08:46,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-09-16 14:08:46,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-16 14:08:46,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-09-16 14:08:46,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-16 14:08:46,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-16 14:08:46,385 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-09-16 14:08:46,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:46,385 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-16 14:08:46,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-16 14:08:46,386 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-16 14:08:46,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-16 14:08:46,386 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:46,386 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:46,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-16 14:08:46,593 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:46,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:46,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-09-16 14:08:46,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:46,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960990344] [2020-09-16 14:08:46,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:46,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:46,724 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:46,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960990344] [2020-09-16 14:08:46,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821549433] [2020-09-16 14:08:46,725 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:46,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:46,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-16 14:08:46,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:46,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:46,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:46,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-16 14:08:46,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325400073] [2020-09-16 14:08:46,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 14:08:46,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:46,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 14:08:46,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-16 14:08:46,804 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-09-16 14:08:47,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:47,256 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-16 14:08:47,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-16 14:08:47,256 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-16 14:08:47,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:47,257 INFO L225 Difference]: With dead ends: 104 [2020-09-16 14:08:47,257 INFO L226 Difference]: Without dead ends: 98 [2020-09-16 14:08:47,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-09-16 14:08:47,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-16 14:08:47,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-09-16 14:08:47,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-16 14:08:47,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-09-16 14:08:47,260 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-09-16 14:08:47,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:47,261 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-09-16 14:08:47,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 14:08:47,261 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-09-16 14:08:47,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-16 14:08:47,261 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:47,261 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:47,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-09-16 14:08:47,468 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:47,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:47,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-09-16 14:08:47,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:47,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353701979] [2020-09-16 14:08:47,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:47,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:47,576 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:47,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353701979] [2020-09-16 14:08:47,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747578054] [2020-09-16 14:08:47,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:47,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:08:47,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:47,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-16 14:08:47,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:47,662 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:47,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:47,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:47,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-16 14:08:47,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342520046] [2020-09-16 14:08:47,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-16 14:08:47,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:47,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-16 14:08:47,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-16 14:08:47,677 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-09-16 14:08:48,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:48,238 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-09-16 14:08:48,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-16 14:08:48,238 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-16 14:08:48,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:48,239 INFO L225 Difference]: With dead ends: 85 [2020-09-16 14:08:48,240 INFO L226 Difference]: Without dead ends: 77 [2020-09-16 14:08:48,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-09-16 14:08:48,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-16 14:08:48,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-09-16 14:08:48,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-16 14:08:48,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-09-16 14:08:48,243 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-09-16 14:08:48,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:48,244 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-09-16 14:08:48,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-16 14:08:48,244 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-09-16 14:08:48,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-16 14:08:48,245 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:48,245 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:48,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-09-16 14:08:48,456 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:48,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:48,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-09-16 14:08:48,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:48,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825673273] [2020-09-16 14:08:48,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:48,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:48,622 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:48,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825673273] [2020-09-16 14:08:48,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542178064] [2020-09-16 14:08:48,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:48,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-16 14:08:48,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:48,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-16 14:08:48,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:48,699 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:48,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:48,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-16 14:08:48,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876705271] [2020-09-16 14:08:48,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-16 14:08:48,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:48,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-16 14:08:48,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-16 14:08:48,701 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-09-16 14:08:48,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:48,927 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-09-16 14:08:48,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 14:08:48,928 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-16 14:08:48,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:48,929 INFO L225 Difference]: With dead ends: 94 [2020-09-16 14:08:48,929 INFO L226 Difference]: Without dead ends: 88 [2020-09-16 14:08:48,929 INFO L675 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 [2020-09-16 14:08:48,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-16 14:08:48,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-09-16 14:08:48,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-16 14:08:48,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-16 14:08:48,932 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-16 14:08:48,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:48,932 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-16 14:08:48,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-16 14:08:48,932 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-16 14:08:48,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-16 14:08:48,933 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:48,933 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:49,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-09-16 14:08:49,140 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:49,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:49,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-09-16 14:08:49,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:49,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253257755] [2020-09-16 14:08:49,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:49,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:49,325 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:49,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253257755] [2020-09-16 14:08:49,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638000174] [2020-09-16 14:08:49,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:49,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:08:49,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:49,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-16 14:08:49,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:49,412 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:49,424 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:49,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:49,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-16 14:08:49,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906181254] [2020-09-16 14:08:49,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 14:08:49,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:49,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 14:08:49,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-16 14:08:49,426 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-16 14:08:49,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:49,797 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-09-16 14:08:49,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 14:08:49,798 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-16 14:08:49,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:49,799 INFO L225 Difference]: With dead ends: 91 [2020-09-16 14:08:49,799 INFO L226 Difference]: Without dead ends: 85 [2020-09-16 14:08:49,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-16 14:08:49,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-16 14:08:49,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-09-16 14:08:49,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-16 14:08:49,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-16 14:08:49,801 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-16 14:08:49,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:49,801 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-16 14:08:49,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 14:08:49,802 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-16 14:08:49,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-16 14:08:49,802 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:49,802 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:50,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-09-16 14:08:50,012 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:50,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:50,012 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-09-16 14:08:50,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:50,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284553400] [2020-09-16 14:08:50,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:50,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:50,179 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:50,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284553400] [2020-09-16 14:08:50,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523012836] [2020-09-16 14:08:50,180 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:50,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-16 14:08:50,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:50,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-16 14:08:50,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:50,252 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:50,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:50,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-16 14:08:50,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422889471] [2020-09-16 14:08:50,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-16 14:08:50,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:50,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-16 14:08:50,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-16 14:08:50,254 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-16 14:08:50,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:50,585 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-16 14:08:50,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 14:08:50,586 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-16 14:08:50,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:50,587 INFO L225 Difference]: With dead ends: 88 [2020-09-16 14:08:50,587 INFO L226 Difference]: Without dead ends: 82 [2020-09-16 14:08:50,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-09-16 14:08:50,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-16 14:08:50,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-09-16 14:08:50,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-16 14:08:50,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-16 14:08:50,590 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-16 14:08:50,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:50,590 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-16 14:08:50,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-16 14:08:50,590 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-16 14:08:50,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-16 14:08:50,591 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:50,591 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:50,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:50,792 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:50,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:50,792 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-09-16 14:08:50,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:50,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911719772] [2020-09-16 14:08:50,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:50,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:50,925 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:50,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911719772] [2020-09-16 14:08:50,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116725936] [2020-09-16 14:08:50,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:50,984 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-16 14:08:50,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:50,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-16 14:08:50,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:51,008 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:51,022 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:51,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:51,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-16 14:08:51,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50605912] [2020-09-16 14:08:51,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 14:08:51,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:51,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 14:08:51,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-09-16 14:08:51,024 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-16 14:08:51,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:51,485 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-09-16 14:08:51,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 14:08:51,485 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-16 14:08:51,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:51,486 INFO L225 Difference]: With dead ends: 87 [2020-09-16 14:08:51,487 INFO L226 Difference]: Without dead ends: 81 [2020-09-16 14:08:51,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-09-16 14:08:51,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-16 14:08:51,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-09-16 14:08:51,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-16 14:08:51,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-16 14:08:51,490 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-16 14:08:51,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:51,490 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-16 14:08:51,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 14:08:51,490 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-16 14:08:51,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-16 14:08:51,490 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:51,490 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:51,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:51,691 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:51,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:51,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-09-16 14:08:51,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:51,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014147615] [2020-09-16 14:08:51,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:51,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:51,828 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:51,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014147615] [2020-09-16 14:08:51,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100801893] [2020-09-16 14:08:51,829 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:51,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:51,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-16 14:08:51,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:51,911 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:51,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:51,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-16 14:08:51,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234936307] [2020-09-16 14:08:51,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-16 14:08:51,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:51,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-16 14:08:51,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-16 14:08:51,912 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-16 14:08:52,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:52,319 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-09-16 14:08:52,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 14:08:52,320 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-16 14:08:52,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:52,320 INFO L225 Difference]: With dead ends: 84 [2020-09-16 14:08:52,321 INFO L226 Difference]: Without dead ends: 78 [2020-09-16 14:08:52,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-09-16 14:08:52,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-16 14:08:52,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-09-16 14:08:52,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-16 14:08:52,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-16 14:08:52,323 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-16 14:08:52,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:52,324 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-16 14:08:52,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-16 14:08:52,324 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-16 14:08:52,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-16 14:08:52,325 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:52,325 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:52,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-09-16 14:08:52,533 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:52,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:52,534 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-09-16 14:08:52,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:52,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220620116] [2020-09-16 14:08:52,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:52,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:52,672 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:52,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220620116] [2020-09-16 14:08:52,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329194315] [2020-09-16 14:08:52,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:52,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:08:52,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:52,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-16 14:08:52,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:52,753 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:52,766 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:52,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:52,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-16 14:08:52,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43484645] [2020-09-16 14:08:52,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 14:08:52,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:52,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 14:08:52,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-16 14:08:52,768 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-16 14:08:53,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:53,292 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-16 14:08:53,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-16 14:08:53,293 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-16 14:08:53,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:53,294 INFO L225 Difference]: With dead ends: 83 [2020-09-16 14:08:53,294 INFO L226 Difference]: Without dead ends: 77 [2020-09-16 14:08:53,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-09-16 14:08:53,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-16 14:08:53,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-09-16 14:08:53,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-16 14:08:53,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-16 14:08:53,298 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-16 14:08:53,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:53,298 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-16 14:08:53,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 14:08:53,298 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-16 14:08:53,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-16 14:08:53,299 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:53,299 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:53,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:53,500 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:53,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:53,501 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-09-16 14:08:53,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:53,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875095708] [2020-09-16 14:08:53,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:53,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875095708] [2020-09-16 14:08:53,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904930925] [2020-09-16 14:08:53,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:53,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-16 14:08:53,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:53,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-16 14:08:53,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:53,726 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:53,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:53,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-16 14:08:53,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897017086] [2020-09-16 14:08:53,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-16 14:08:53,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:53,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-16 14:08:53,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-16 14:08:53,729 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-16 14:08:54,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:54,185 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-09-16 14:08:54,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-16 14:08:54,185 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-16 14:08:54,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:54,186 INFO L225 Difference]: With dead ends: 80 [2020-09-16 14:08:54,186 INFO L226 Difference]: Without dead ends: 74 [2020-09-16 14:08:54,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-09-16 14:08:54,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-16 14:08:54,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-09-16 14:08:54,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-16 14:08:54,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-16 14:08:54,189 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-16 14:08:54,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:54,189 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-16 14:08:54,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-16 14:08:54,190 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-16 14:08:54,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-16 14:08:54,190 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:54,190 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:54,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-09-16 14:08:54,391 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:54,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:54,392 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-09-16 14:08:54,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:54,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489060710] [2020-09-16 14:08:54,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:54,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:54,525 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:54,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489060710] [2020-09-16 14:08:54,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749432472] [2020-09-16 14:08:54,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:54,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:08:54,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:54,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-16 14:08:54,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:54,622 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:54,639 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:54,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:54,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-16 14:08:54,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808873093] [2020-09-16 14:08:54,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 14:08:54,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:54,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 14:08:54,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-16 14:08:54,641 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-16 14:08:55,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:55,256 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-09-16 14:08:55,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-16 14:08:55,257 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-16 14:08:55,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:55,257 INFO L225 Difference]: With dead ends: 79 [2020-09-16 14:08:55,258 INFO L226 Difference]: Without dead ends: 73 [2020-09-16 14:08:55,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-09-16 14:08:55,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-16 14:08:55,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-09-16 14:08:55,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-16 14:08:55,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-16 14:08:55,261 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-16 14:08:55,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:55,261 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-16 14:08:55,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 14:08:55,262 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-16 14:08:55,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-16 14:08:55,262 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:55,262 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:55,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:55,464 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:55,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:55,465 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-09-16 14:08:55,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:55,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707886209] [2020-09-16 14:08:55,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:55,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:55,606 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:55,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707886209] [2020-09-16 14:08:55,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578503292] [2020-09-16 14:08:55,607 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:55,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-16 14:08:55,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:55,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-16 14:08:55,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:55,679 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:55,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:55,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-16 14:08:55,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926151452] [2020-09-16 14:08:55,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-16 14:08:55,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:55,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-16 14:08:55,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-16 14:08:55,681 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-16 14:08:56,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:56,170 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-09-16 14:08:56,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-16 14:08:56,171 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-16 14:08:56,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:56,172 INFO L225 Difference]: With dead ends: 95 [2020-09-16 14:08:56,172 INFO L226 Difference]: Without dead ends: 89 [2020-09-16 14:08:56,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-09-16 14:08:56,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-16 14:08:56,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-09-16 14:08:56,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-16 14:08:56,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-09-16 14:08:56,174 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-09-16 14:08:56,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:56,175 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-09-16 14:08:56,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-16 14:08:56,175 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-09-16 14:08:56,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-16 14:08:56,175 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:56,175 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:56,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-09-16 14:08:56,376 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:56,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:56,377 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-09-16 14:08:56,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:56,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616292445] [2020-09-16 14:08:56,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:56,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:56,519 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:56,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616292445] [2020-09-16 14:08:56,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825309194] [2020-09-16 14:08:56,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:56,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-16 14:08:56,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:56,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-16 14:08:56,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:56,605 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:56,619 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:56,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:56,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-16 14:08:56,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113380669] [2020-09-16 14:08:56,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 14:08:56,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:56,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 14:08:56,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-09-16 14:08:56,621 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-09-16 14:08:57,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:57,301 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-09-16 14:08:57,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-16 14:08:57,302 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-16 14:08:57,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:57,303 INFO L225 Difference]: With dead ends: 76 [2020-09-16 14:08:57,303 INFO L226 Difference]: Without dead ends: 68 [2020-09-16 14:08:57,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-09-16 14:08:57,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-16 14:08:57,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-09-16 14:08:57,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-16 14:08:57,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-09-16 14:08:57,306 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-09-16 14:08:57,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:57,306 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-09-16 14:08:57,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 14:08:57,307 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-09-16 14:08:57,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-16 14:08:57,307 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:57,307 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:57,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:57,517 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:57,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:57,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-09-16 14:08:57,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:57,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26474197] [2020-09-16 14:08:57,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:57,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:57,640 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:57,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26474197] [2020-09-16 14:08:57,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193006977] [2020-09-16 14:08:57,641 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:57,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:57,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-16 14:08:57,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:57,718 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:08:57,735 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:57,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:57,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-16 14:08:57,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181178706] [2020-09-16 14:08:57,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 14:08:57,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:57,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 14:08:57,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-16 14:08:57,737 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-09-16 14:08:58,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:58,354 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-09-16 14:08:58,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-16 14:08:58,355 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-16 14:08:58,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:58,356 INFO L225 Difference]: With dead ends: 84 [2020-09-16 14:08:58,356 INFO L226 Difference]: Without dead ends: 79 [2020-09-16 14:08:58,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-09-16 14:08:58,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-16 14:08:58,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-09-16 14:08:58,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-16 14:08:58,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-16 14:08:58,358 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-09-16 14:08:58,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:58,359 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-16 14:08:58,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 14:08:58,359 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-16 14:08:58,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-16 14:08:58,359 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:58,359 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:58,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-09-16 14:08:58,562 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:58,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:58,563 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-09-16 14:08:58,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:58,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027805878] [2020-09-16 14:08:58,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:58,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:58,700 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:58,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027805878] [2020-09-16 14:08:58,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728297375] [2020-09-16 14:08:58,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:58,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:08:58,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:58,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-16 14:08:58,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:58,787 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:58,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-16 14:08:58,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 10 [2020-09-16 14:08:58,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044017539] [2020-09-16 14:08:58,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-16 14:08:58,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:58,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-16 14:08:58,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-09-16 14:08:58,789 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 8 states. [2020-09-16 14:08:58,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:58,803 INFO L93 Difference]: Finished difference Result 151 states and 338 transitions. [2020-09-16 14:08:58,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-16 14:08:58,804 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-09-16 14:08:58,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:58,805 INFO L225 Difference]: With dead ends: 151 [2020-09-16 14:08:58,805 INFO L226 Difference]: Without dead ends: 50 [2020-09-16 14:08:58,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-09-16 14:08:58,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-16 14:08:58,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-09-16 14:08:58,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-16 14:08:58,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 100 transitions. [2020-09-16 14:08:58,807 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 100 transitions. Word has length 19 [2020-09-16 14:08:58,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:58,807 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 100 transitions. [2020-09-16 14:08:58,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-16 14:08:58,807 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 100 transitions. [2020-09-16 14:08:58,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-16 14:08:58,808 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:58,808 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:59,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-09-16 14:08:59,015 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:59,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:59,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-09-16 14:08:59,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:59,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248544185] [2020-09-16 14:08:59,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:59,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:59,086 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:59,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248544185] [2020-09-16 14:08:59,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136698755] [2020-09-16 14:08:59,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:59,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-16 14:08:59,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:59,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-16 14:08:59,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:59,155 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:59,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-16 14:08:59,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2020-09-16 14:08:59,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729426601] [2020-09-16 14:08:59,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-16 14:08:59,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:59,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-16 14:08:59,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-09-16 14:08:59,157 INFO L87 Difference]: Start difference. First operand 50 states and 100 transitions. Second operand 8 states. [2020-09-16 14:08:59,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:59,174 INFO L93 Difference]: Finished difference Result 86 states and 150 transitions. [2020-09-16 14:08:59,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-16 14:08:59,174 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-09-16 14:08:59,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:59,175 INFO L225 Difference]: With dead ends: 86 [2020-09-16 14:08:59,175 INFO L226 Difference]: Without dead ends: 0 [2020-09-16 14:08:59,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-09-16 14:08:59,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-16 14:08:59,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-16 14:08:59,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-16 14:08:59,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-16 14:08:59,176 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-09-16 14:08:59,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:59,176 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-16 14:08:59,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-16 14:08:59,177 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-16 14:08:59,177 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-16 14:08:59,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:59,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.09 02:08:59 BasicIcfg [2020-09-16 14:08:59,383 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-16 14:08:59,385 INFO L168 Benchmark]: Toolchain (without parser) took 52829.16 ms. Allocated memory was 135.8 MB in the beginning and 441.5 MB in the end (delta: 305.7 MB). Free memory was 96.1 MB in the beginning and 284.4 MB in the end (delta: -188.3 MB). Peak memory consumption was 117.3 MB. Max. memory is 7.1 GB. [2020-09-16 14:08:59,385 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 135.8 MB. Free memory was 116.1 MB in the beginning and 115.7 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-09-16 14:08:59,386 INFO L168 Benchmark]: CACSL2BoogieTranslator took 820.61 ms. Allocated memory was 135.8 MB in the beginning and 202.4 MB in the end (delta: 66.6 MB). Free memory was 95.7 MB in the beginning and 161.9 MB in the end (delta: -66.3 MB). Peak memory consumption was 24.7 MB. Max. memory is 7.1 GB. [2020-09-16 14:08:59,386 INFO L168 Benchmark]: Boogie Procedure Inliner took 65.34 ms. Allocated memory is still 202.4 MB. Free memory was 161.9 MB in the beginning and 159.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2020-09-16 14:08:59,386 INFO L168 Benchmark]: Boogie Preprocessor took 37.74 ms. Allocated memory is still 202.4 MB. Free memory was 159.9 MB in the beginning and 158.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 7.1 GB. [2020-09-16 14:08:59,387 INFO L168 Benchmark]: RCFGBuilder took 481.56 ms. Allocated memory is still 202.4 MB. Free memory was 158.8 MB in the beginning and 138.5 MB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. [2020-09-16 14:08:59,387 INFO L168 Benchmark]: TraceAbstraction took 51410.53 ms. Allocated memory was 202.4 MB in the beginning and 441.5 MB in the end (delta: 239.1 MB). Free memory was 137.4 MB in the beginning and 284.4 MB in the end (delta: -147.0 MB). Peak memory consumption was 92.1 MB. Max. memory is 7.1 GB. [2020-09-16 14:08:59,389 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 135.8 MB. Free memory was 116.1 MB in the beginning and 115.7 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 820.61 ms. Allocated memory was 135.8 MB in the beginning and 202.4 MB in the end (delta: 66.6 MB). Free memory was 95.7 MB in the beginning and 161.9 MB in the end (delta: -66.3 MB). Peak memory consumption was 24.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 65.34 ms. Allocated memory is still 202.4 MB. Free memory was 161.9 MB in the beginning and 159.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 37.74 ms. Allocated memory is still 202.4 MB. Free memory was 159.9 MB in the beginning and 158.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 481.56 ms. Allocated memory is still 202.4 MB. Free memory was 158.8 MB in the beginning and 138.5 MB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 51410.53 ms. Allocated memory was 202.4 MB in the beginning and 441.5 MB in the end (delta: 239.1 MB). Free memory was 137.4 MB in the beginning and 284.4 MB in the end (delta: -147.0 MB). Peak memory consumption was 92.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.4s, 57 ProgramPointsBefore, 20 ProgramPointsAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 486 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions - PositiveResult [Line: 703]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 51.2s, OverallIterations: 71, TraceHistogramMax: 6, AutomataDifference: 21.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.5s, HoareTripleCheckerStatistics: 1144 SDtfs, 3053 SDslu, 4481 SDs, 0 SdLazy, 4772 SolverSat, 2192 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2330 GetRequests, 841 SyntacticMatches, 64 SemanticMatches, 1425 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6870 ImplicationChecksByTransitivity, 19.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=67, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 71 MinimizatonAttempts, 1147 StatesRemovedByMinimization, 68 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 9.1s InterpolantComputationTime, 2056 NumberOfCodeBlocks, 2056 NumberOfCodeBlocksAsserted, 254 NumberOfCheckSat, 1919 ConstructedInterpolants, 0 QuantifiedInterpolants, 117675 SizeOfPredicates, 456 NumberOfNonLiveVariables, 6614 ConjunctsInSsa, 728 ConjunctsInUnsatCore, 137 InterpolantComputations, 7 PerfectInterpolantSequences, 82/1440 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...